Xs650 750 engine modification guide. 30 or Saturdays from 09.
Xs650 750 engine modification guide About Us; XS650 Club Constitution ; Historic & Club Bike Rego; XS History; Technical; Buy & Sell Menu Toggle. It is 2 3/4' deep, lowering the oil level to free the flywheels and primary gears from oil drag. Thread starter David M; Start date Dec 19, 2010; Tags engine how to remove D. 35mm 1986-1987 Honda TLR200, 1979-1981 Honda XL500S, 1979-1980 Honda XR500, 1976-1979 Yamaha RD400, 1978-1981 Yamaha SR500, 1977-1981 Yamaha XS650 Front Sprocket - 17T JTF568. Now I’m at the point of rebuilding the motor. The gas tank has been repainted (two stage) and hasn't yet had the clear coat buffed. Thanks. Jul 6, 2024. ARTICLE . 650 cc; Learner Approved; 10000 km I have a 80 xs650, has a PMA, pamco e advance, 4 cell antigravity (kick only), stock engine for now (after mobbing it awhile, it'll get built to a big bore engine). I possibly even spent more time researching it than actually doing it! Do your research and you will come out – 1974 Yamaha XS 650. Phyberoptic XS650 Addict. I was wondering what you guys are doing with the 750 kit, are you adding a cam? anything with the clutch? welded crank? larger capacity oil pump? any info is useful as in the Get yourself a manual, and also check out the FAQ section on Mikes for a rebuild guide. 650performance. Fresh build, only break in time on new engine build, almost everything on this build is brand new. Do you have any suggestions of what to look for? choppermania; Thread; Jul 13, 2023; carburator carburetor chopper; Replies: 6; Forum: The Garage; B. There is more than enough information on rebuilding the xs650 engine out there to do it. MANUFACTURER SPECIFICATIONS. For small engines with not a tremendous amount of horse power a 1" x 1/8" mild steel ERW tube should be fine. At the top of the page is the sump extension so the oil doesn't get sloshed around as much putting extra load on the The vintage Shell #1 cam works well on a 750 street engine and can be sourced from Hoos Racing. Your stock charging system WILL FAIL YOU at some point, and it is $$$$ to fix, and you'll likely have trouble again. Sold / Found strong top-end pull. Craig Weeks is an xs650 performance geek who The XS650 cases, clutch and transmission were designed for an engine that would make around 42 rear wheel horsepower (RWHP). 5 inch headpipes on my 750 kitted 75 and the bike runs great. " BlackRabbit18; Apr 5, 2024; The Garage; Replies 3 Views 386. The plan included the following. Both suggestions came from this thread. portion. Not too excited to pull the engine since summer is waning and I don't have a lot of time these days, but that tell tale metal-on-metal sound is killing me. No power lifting required, and your Wait a minute! I forgot about the TX750. This is my first time messing with an xs 650 and I am putting it in a frame I made. Exhaust discussion? Thread starter special-k; Start date Aug 6, 2017; S. Next Last. Craig Weeks' "XS 650/750 Engine Modification Guide. Motorcycle frames are made with both ERW tubing and DOM tubing. Thanks gentlemen. Nov 17, 2023 #1 But I must add the addition of fresh plugs and some octane booster to the 750's tool kit is always wise. Messages 2 Reaction score 0 Points 1 Location Nashville - Dallas. What's new. The 750 is amazing. Media. jccdkc; Jan 29, 2024; The Garage; Replies 2 Views 316. the thing to be real carefull about is not to enlargen the ports but to remove the casting marks and redefine the shape around the valve guide. CC1 Banned. The other factor with our beloved XS650's is that they do not have an oil filter as such. Experience has taught me that the latest engine version (of any given design) is not always the most desireable. TedBell; Jan 9, 2022 However, he already had two Champion framed XS's one a 700 the other a 750. Was discussing XS650 heads earlier. Rephase requires different ignition, which usually 650 Performance. The best parallel twin ever built. ENGINE SPECS Engine Type: 653 cc, air cooled, 2 – cylinders in line, 4-stroke Engine Bore and Stroke: 75 mm x 74 mm Valves 2 valves/cylinder Horsepower: 51 hp (38 kW) @ 7500 rpm Torque 50 Nm (36. I'm going to include it in the latest update of the engine modification guide that should be ready in the next week or so. I want it bad! On the XS650 the main issues are that you have to change the bearings on your rear wheel to 17mm to fit the SR axle. " Would love to buy it but I cant find a link anywhere. jerryxs650. The major limitation to developing horsepower in our beloved engines (developing hp is a different topic to actually reliably and effectively getting it to the rear wheel). As you have probably read, there is We do not offer this guide as the last word on XS650 carburetion; references online and in print that we've found valuable have been recommended, and we hope you find them useful. 750 and 880cc big bore engine kits The Yamaha XS650 responds extremely well to an increase in cubic capacity, the resultant increase in cubic capacity and compression ratio yield a much improved torque output at lower rpm. New media New comments Search XS650. It's time to vote for the bikes you want to see in the 2025 XS650 Calendar! Engine Tuning an XS650 engine for maximum performance. build engine O. Yamaha XS650 Cafe Racer modification By AN--BU Custom it has a great engine feel that is unique to the vertical twin. com? 650 Rider went offline for about a month at the beginning of 2010. Bigger choppers even use 1 3/8" x 1/8" walls. It's a pretty good trouble shooting guide made by Yamaha. I did my first oil change after about 100 miles, the new 750 engine. As I understand it, JASO MA-2 is applicable to our motorcycle. jpdevol. EBC This is a 1979 Yamaha xs 650 Special with plans of building a Chopper or Cafe Racer out of it, but I realized I just got too many irons in the fire already. ENGINE REASSEMBLY | FITTING THE CYLINDER HEAD COVER, AUTO-ADVANCE Cam chain stoppers and front guides changed Oil pump lost the pressure release valve Kick start gear has 25T (-1) Gearbox main shaft 1st gear has 13T (-1) Well, the engine was pulled from a '74 XS650. General Discussion . But you should conduct your research before posting numerous threads that have already been discussed. Reply. Well, it is a cool machine but there are problems. For Sale - 1980 xs 650 basket case / The XS650, in America and Worldwide has developed a cult following for good reason. Thread starter HOTEL71; Start date Jun 13, 2021; HOTEL71 XS650 Enthusiast. So I have four bikes 1972 Honda CB 350F 1973 Honda Cb 500F 1977 Yamaha XS650 and just this past weekend I bought a PRISTINE 1973 Honda CB 750, I mean not ONE spot of rust on it. That was a new frame and engine. Thread starter CC1; Start date Jul 16, 2021; C. Yamaha changed the BS 38 carbs several times over the years the 122. Thread starter FLEA; Start date Aug 4, 2015; Tags The GS650 was a FACTORY by Yamaha special edition. There is no need to go to 36 or 38mm carbs Im trying to find an exploded view of the XS650 drivetrain. How the Best Ever XS650/750 Engines were Built This is the race guide for The AMA race tuned 650/750 bikes High Ratio Primary gears. The perfect MC - XS-Almost. 5 pipes are all you need for the 750 engines. The engine failed but the frame, along with all its cycle parts could accommodate the xs650 engine. Houston, Texas. pkbell; Jul 6, 2024 Hi everyone, I recently purchased a 650 performance manual from the www. JASO is Japanese Automotive Standards Organization. Smedspeed for all your Yamaha XS650 requirements, Yamaha XS650 Engine rebuilds, Yamaha XS650 Rephased crank and camshafts, serving London, Surrey and beyond . Granted locating a light weight piston for a 750 could be difficult but not impossible as a piston This is a serious performance modification. Looks like it's actually decreasing HP throughout most of the usable rpm range and giving a 9hp peak increase at 7,700 rpm where the stock peaked at 7,000. Scroll down left side to XS/TX 650 Manuals Aug 77 to July 78 Production Date. Bottom of post #1 * CARB GUIDE; Post #7 Online manuals ThexsCafe Biker. Year 1977 Used Year:1977 Exterior Color:Black Make:Yamaha Engine Size (cc):650 bored to 750 Model:XS Reed type Positive crankcase ventilation Valve. Nov 24, 2024 You'll want to replace the front cam chain guide and if the motor has near 20K miles (or more A 650 is a great around town engine and can be pressed into highway duty but it feels strained in stock form at anything much above 60-65MPH There's a reason 650-750 twins have been so popular for so long. engine temps. Top end is apart and while the cam chain looks all clean and the guides look good I figure why not replace the chain while I have the motor apart. lbs) @ 6000 rpm . Please note: Directional terms (right/left, forward/back, above/below) refer to position from the perspective of the rider in the saddle. This short how to video covers Cam Chain & Tappet adjustment, Setting the Electronic Ignition and Balancing the CarbsPos XS650-2F 3N0 4F0-250101 1979 New Yamaha Black XS650G 3G0 3G0-000101 1980 Black Gold XS650SG 3G1 2F0-200101 1980 Cardinal Red, New Yamaha Black XS650H 4N9 4N9-000101 1981 Indigo Blue, New Ruby Red XS650SH 4M4 4M4-000101 1981 New Yamaha Black, Frost Silver XS650SJ 5V4 5V4-000101 1982 New Yamaha Black Warm engine, throttle wide open, no choke. " BlackRabbit18; Apr 5, 2024; The Garage; Replies 3 Rebuilt Yamaha XS650 engines. The bike is pretty complete except for missing throttle cables, and plastic tube grip slips on which you can see in pics. Yamaha XS 650 produced by AN-BU Custom Motors in Aichi Prefecture is one that is full of speed as its looks. Can anyone help me out Is the head on the 400 the same as the 650 just a smaller bore? Will a 650 head bolt on to the 400 block? I know the pistons and all that would have to chance too but can it be done. Thread starter Toro; Start date Nov 17, 2023; Tags seal kit Toro XS650 Member. We only use cookies to give you the best experience on our site. XS650 Guru. I rebuilt mine solely off of the information found online. 750 cc rephased engine, with all the usual tricks. Aussie club again and again scroll down about 3/4's of the way down the page. -2 means it’s safe for catalytic converters (I believe). We've tried to gather the most frequently-requested information into a single reference. I'd certainly be all over the bike if I came across it Enjoy XS650. This was before Mike's XS existed and most of the parts were OEM new old stock from dealers. Latest activity New posts New media New media Craig Weeks' "XS 650/750 Engine Modification Guide. Jan 19, 2011 #11 Wow, what timing The engine needs to be able to deal with ~roughly~ 60-odd HP, street use, pump gas. The pictures show the modification. The piston modification is a common mod, pioneered many years ago by Joe Minton in his highly regarded “Building a Here's another way of setting the mix screw: you find the engine's mix screw sweet spot as I described before. r. Like Mikes sells a 750 kit for the 650 would any of that work on Enjoy XS650. T. " BlackRabbit18; Apr 5, 2024; The Garage; Replies 3 Views 380. Modified limited production European Race Engine Cylinder Block has enlarged fins for improved cooling. Thread starter xs650-4-me; Start date Xs 650 with crf engine. " BlackRabbit18; Apr 5, 2024; The Garage; Replies 3 Views 387. 00 Copper Big Bore Head Gaskets. I assumed as much, but I was hoping that just maybe it might be less involved. In order to save the technical information that was here, XS650. It ran great until I dropped a valve in it. With twin Mikuni carbs, the XS1's 653cc engine delivered Repainted everything. BUT I cant figure out for the life of me, which is faster/stronger: the XS650 or the 750. Later model Standard tank filler caps that look like Special tank filler caps are different enough that they won't swap. com is dedicated to the Yamaha 650 twin motorcycles (XS-1, XS-2, TX650, and XS650) and to their owners who love to ride, restore, and customize them. We began by purchasing the Engine Modification Guide from Craig Weeks (a must have in my opinion) and searching the web, we began to develop our build plan. Messages 158 Reaction score 93 Points 28 Location Pasadena, MD 21122. Have a look at the Australian XS 650 club website it has a step by step guide to fitting a LC/RZ alternator. Further information on this is available from - Old Side Car Cross it is in French, however, google translate does a good job. Go. A small power increase has been noted during dyno tests and the crankcase vacuum helps prevent crankcase pressure When the Yamaha XS 650 was launched in October 1969 it had one of the most advanced reciprocating engines starting with the 1974 models, vibration damping modifications were made to the engine and handlebar mountings. The Garage . (people use diesel oil because it has higher levels of detergents similar to what all oils used to have decades ago) I have heard that 20/50 castrol is a good choice because it works on the engine, forks and even the chain Craig Weeks modification guide from 650 Central has solid information on setting up XS 650's for racing. Yamaha 750 twin. Spin-on Oil Filter Conversion. The Garage. The motor now is bone stock. There are many options for big bore engines, the easiest route is the 750 as it requires very little machining work. original chart kindly given to me from, (link), THE XS CAFE ** PDF. For professional rebuilt Yamaha XS650 engines, from 653 to 880 cc, we advise you to contact Jerry van der Heiden - www. It's good for up to about 64 - 65 RWHP in a well prepared engine with a decently ported head. As may be apparent from the lines of the XS750, it was the father of Yamaha's hugely popular Virago series, which continues production nearly twenty years since its introduction. Raise frame back on wheels and move it aside. The 24 complete running bikes with OU-72 engines were frantically assembled by borrowing mechanics from Yamaha’s snowmobile division. A couple of the wire colors in the guide are different, it helps if you have a color-coded wiring diagram of your year. net. 30 or Saturdays from 09. S. Material has been peer reviewed by Garage staff (thanks, y'all!), and is as accurate as we know how to make it. 5 XS650. Tour Guide; Travel Agent/Consultant; Waiting Staff; Information & Communication Technology yamaha xs650 750 kitted. The Heiden Tuning Pistons are fairly lightweight in comparison. EBC 7 Pack Clutch. what are the options for the pistons? who makes them? it's overkill, but for a racer, a great way to go. com receives a small share of sales from some links on this page, but direct donations have a much greater impact on keeping this site going. Specs: 750cc JE Pistons. Alternatively, you could machine the swingarm to take the XS650 axle. Reactions: arcticXS and gggGary. Valve hooks to engine top breather vent and allows expelled air out but reed prevents air re-entering quickly so a very small vacuum is created in the crankcase. Get his modification guide and study it The xs650 is a simple, fun engine to work on but it can't handle being modified for more than 70 horse power without eating itself. this referee at AHRMA says I can do "novice historic production heavy-weight" or "Sportsman 750" and it says xs650 in the sportsman section, but in the nhp heavy weight it says At that time I replaced the cam chain and most bearings. #KCEN11-8750. XS650. Design limitations are found in exhaust port shape and cross sectional area-too large. 440 lift,you want to match the port to the cam, you'll need to re profile the guide boss area though. I know that 270⁰ is a popular rephase for the xs650. If the compression values are acceptable, resist any temptation to mess with the engine. 020" drop, but I wouldn't take anything for granted. STOCK & MODIFIED XS650/750 CYLINDER HEADS A good basic engine setup for a XS street engine is a 750 kit, 34 or 36mm Mikuni flat slides, 9. triumph68 XS650 Enthusiast. Never been bored. I am posting a small This is a 270 Degree XS650 Rephased engine that I built for my own personal use – but it’s not coming to fruition as fast as I’d like, so Im willing to part with the engine. There should be heaps of Elsie parts still in the UK. Hmmm. And it works visually - even non-bikers recognise it as a proper motorbike. Drool. Yamaha xs 650 Custom Special. Pmd install on 82 xs650 Enjoy XS650. Also, the SR frame isn't all that great. reason I ask is I have a chance to pick up what the seller Forums. " - anyone actually read this? Looking for the Legendary Craig Weeks' "XS 650/750 Engine Modification Guide. I would like to make a "hot rod" xs 650 motor. However it is not yet a dedicated race engine, it has more in common with the street engine components than you would think. All XS650 enthusiasts are welcome regardless of where you are from or whether you are into XS650 choppers, bobbers, cafe racers, street 1977 Yamaha XS 1977 Yamaha XS 650 / 750 Cafe Racer Built by Greg Hageman of Doc's Chops. MA is the standard for a single unit engine with a wet clutch. 270 Degree HHB Crank . Jim Schmidt(Spelling) has been doing for years racing the Norton's. Loved the sewing machine sound of the 180⁰ honda twins. BIG carburation problems after If you read Craig Weeks's "XS/TX650 Engine Modification Guide" you'll see that closer clearances are specified; those figures are safe only with the use of premium rods (Carillo, Falicon, etc. When the Griz and I put together the carb guide, we simply didn't have all the info needed to do a definitive I. The rules specified that a certain number of bikes had to be sold to the general public to qualify as a production bike for the classification they were competing in. For ease of use, each major section below appears in a separate yamaha xs650 750 kitted. Question is has anyone rephased an xs650 engine to 180⁰? Could it be done or would you be fighting the engineering used to "engineer out " the primary vibrations of the 360⁰ twin. It predates JASO standards. . With OE pistons at 4th over you should be OK with a . what dose it cost to do a full engine rebuild 82 xs 650 I live in Connecticut. com receives a small share of sales from some links on this page, but direct donations have a much greater impact on keeping this site going Enjoy XS650. Yamalube 4-cycle oil or SAE 20W/40 type “SE” motor oil (from the manual) 20w50 or 20w40 should work fine too. nl All engines are (as) new from the inside and the outside. If you go to 800 cc or more then the 1. I will double check a manual from a Virago forum. Messages 52 Reaction score 1 Points 6 Cam Chain Guide Mod XS650 Top End Buildup Calculate engine displacement Rephasing an XS650 engine: "Rephasing, What is it?" Cylinder head torque pattern and specs: "Bad Head Torquing?" XS650 piston rings Overdrive 5th gear Flushing out an XS650 engine: "calling all engine guys" Splitting the crankcase Starter and big bore Power from 750cc big bore Upper View our full range of Yamaha XS650 Motorcycles online at bikesales. especially out of corners. Speedhut GPS Speedometer questions. D. Will it make your XS engine last forever? Composite head and base gasket set for our 750 Big Bore kits. The rules specified that a certain number of bikes I e-mailed Motolana and here is the info for their SR500 swingarm onto XS650 conversion. Tough durability, classic look and abundance of cheap parts make the XS650 the perfect platform to build a KILLER Yamaha xs650 hardtail or café racer. Found way to much aluminum fillings in the engine. Woodstock1976; Nov 2, 2024; The Enjoy XS650. Unrestricted and Free Come Join Us. Clutch Modification. This A well tuned XS650 - 750 will run smoother when the reciprocating mass of the rods small end is reduced along with addition of a longer rod like CR500. The starter motor fits underneath the XS650 engine, so I re-fit it now to save problems later. Additionally, the handlebars are 1st gen Vmax, the throttle twist grip is FZ1, the non stock clutch lever and perch is FZ1, and a shop manual with supplements is included. Model Yamaha XS 650 A 1974 Motorcycle Style: Standard . Pulled it all apart and the Allen bolts went through the hub just far enough to hit the basket. I have new cam chain, link, guide, bronze sealing washers, seals, gaskets, threebond 1184 (for head cover and head in front of engine in a few 1977 Yamaha XS650 and just this past weekend I bought a PRISTINE 1973 Honda CB 750, I mean not ONE spot of rust on it. ardcore hardtail modification. By continuing to use the site you are agreeing to our use of cookies. I bought it off of a guy I have purchoused several bikes from in the past, he purchoused it out of an estate. zrx1100. 30-13. on your 750 the parts diagram shows a brass threaded plug (#20). Engine removal - single handed. " BlackRabbit18; Apr 5, 2024; The Garage; Replies 3 Views 343. Thread starter Ccanady; Start date Jul 30, 2018; 1; 2; Next. New media New XS650. OBO plus shipping. Thread starter stunter6912; Start date Mar 20, 2014; Tags XS650. I have home built 1. Ccanady XS650 Addict. Sucks for almost dead batteries 2: Won't charge at idle The XS650 Garage Carburetor Guide Introduction This manual has been prepared by Grizld1 ( aka Dick Russell, Yamaha 650 Society Tech Advisor) and 5twins. I built s 90 degree rephrased XS650 I got the rephrased spline from Daryl Hutcheon out of Australia and Probe Engineering Inc supplied the XS650-90L Electronic Ignition. Haynes Manuals, part no. Messages 1,022 Reaction score 1,416 Points 163 Location the engine I am building will be a racer. Quick question: I need the engine number to title my bike in MN. Carb sync and tune guide. pdf), Text File (. This website is using cookies. Bikes & Bits; Merchandise; XS650 Builds Menu Toggle. are all of the yamaha xs 650 crankshafts the same ? if not what are the differences ? Forums. At the heart of the XS is a indestructible engine. New Champion copy Yamaha 750 Twin for sale. J. Messages 28 Reaction score 56 Points 13 Location Canada. Take readings at both spark plug holes a couple of times. Build. My XS650SJ service manual says to use Yamalube 20W40 or SAE 20W40 SE. With the 1100 running Mikuni carbs the difference is 1 size and the rear is the smaller. David M XS650 Enthusiast. Early tank gas taps are manual, not vacuum and they don't swap neither. General Discussion. The site is worth a read if you intend to go big - the French and European Side Car Cross builders really were the pioneers in big bore XS Yamaha's and Craig Weeks' "XS 650/750 Engine Modification Guide. Seventy-three percent of the I have an engine you might be interested in. $7,800. The stock XS650 charging system is terrible for many reasons. the 14 mm pipe to engine side! the 12 mm pipe to filter. All these cams like compression, but with today's fuel, I'd keep it under 10 - 1 and no more spark lead than about 34. special-k XS650 Member engine himself and after four hours on the dyno he saw larger torque and horsepower numbers than any prior Yamaha XS650/750 race engine had ever produced. Messages 21 Reaction score 36 Points 13 Location Washington. 00-14. Ride Safe. $73. This document provides information on periodic inspection and maintenance of a XS650E Yamaha XS 650 (H) 1981 Engine Tuning. I am also located on the Gold Coast and I am building up a 81 xs650 which is stock except for a pamco kit at the moment. For some reason I didn't replace the cam chain guide(or I lost the receipt--I try to save all of them and don't see a guide on any). New posts Craig Weeks' "XS 650/750 Engine Modification Guide. any XS650 tank after '73 will fit an '83. ×. Make sure the shafts rotate easily in their bearings before proceeding. Theirs is beautiful. mikuni,s, ascot exhaust(Not 2 into one proper twin system! great note. If you were a member of 650 Rider, you will XS650. And with ANY XS650 engine, a Hey Just wondering what the difference between the 750 and the 650 are, Or is there even a 750. If possible, what would XS650. I've always. Yamaha XS 650 Custom Special This DIY repair and service manual, covers 1970-1983 Yamaha 650, XS650 and TX650 Twin motorcycles. Messages 216 Reaction score 299 Points 63 Location Guthrie Everyone with an XS650 should do this swap. Yamaha made the crankcase mouths XS650. has anyone upgraded their pistons and cylinders from 650 to 750, i saw that they had a kit on MikesXs, just curious if there are any cons to this upgrade. With less than 10K on the bike, I might wind up replacing some serviceable parts, but getting in there is most of the work anyway. " BlackRabbit18; Apr 5, 2024; The Garage; Replies 3 Views 352. W. Latest engine stuntdouble Contract Killer. The New Cylinder Block has I even got my hands on a factory service manual to understand it better. Made in Taiwan, inferior product from all reports; as are a lot of Mikes XS parts; Don't go over 10. I assumed it was a '74 engine (similar outward appearance, non-linked carbs, etc) until we checked the numbers. (down position). The stock seat is in exceptional condition. While not a race bike, I want to be equipped with the best engine factory run in the XS650 lineup. Messages 239 Reaction score 5 Points 18 Location Hood River, OR. Messages 162 Reaction score 45 36 spoke 700 750 80s bobber chopper cognitomoto custom oldsc rare rear brake set up rear wheel spoked So I’m looking for a more modern setup or carburetors that will fit the XS 650. I put Mikes XS 750 kit on it and some other stuff. Post New Thread Motorcycle Related Discussion (Yamaha XS650, other makes and models, and anything else motorcycle related including tools and gear) XS650. Rewired the whole bike. , a Shell #1 cam, 1 3/4" TT exhaust pipes or the Jemco side pipes, electronic ignition, and a free-flowing head. XS650 Custom Builds; Unusual XS’s; Contact Us; Old Website; XS650 Club of Australia Main Menu. B '82 XS TCI ROTOR. Enjoy XS650. $9,500 . 341. Inlet ports could be smaller and would be better inclined The XS650, in America and Worldwide has developed a cult following for good reason. 1 mm o-ring Forks Drive Chain Engine Oil seals a research thread by the Guru 5twins has all? the seals with part numbers and decoding. Latest activity New posts New media New media comments. Powerful enough for the class of bike on offer, revs smoothly but you can feel there is an engine in there. Engine Seal Kit. Thread starter Wharfcreek; Start date Oct 13, 2014; Tags how to W. P. XS versus TX. However, it is not only the appearance but also the monster XS that has been pursued for monster speed. DO YOU HAVE A QUESTION? or +31 (0)88-8338344 (Only Thursday & Friday from 11. Share: Enjoy XS650. Latest activity New posts New media Craig Weeks' "XS 650/750 Engine Modification Guide. Wharfcreek Near 50 Yrs of Experience. I just went through my manual and find the variation in jet sze, and as to which is bigger, front or rear, varies with the Virago engine size. com? Consider making a donation to help support the site. the Aug to July is not set in stone, sometimes there can be a month either The man I bought it from said the frame is a 79 but said he wasn't sure about the engine. When Yamaha was in the middle of the dirt track wars in the '70s, the engines built for Kenny Roberts and others on the factory team (as well as the best privateer engines) were putting out right around 70 RWHP and Once the basic custom frame had the engine in, the front-end/bars on and the seat installed it became apparent that the boards wanted to be forward – way forward. This is the second xs650 turbo project I've seen and both are real head scratchers. WTF, I said. Anyone who is interested a set of these pipes can contact BUB Enterprises at 530-477-7490 for more "Other" carbs Petcocks; 78-84 late model vacuum petcock to tank seal . Anyone have one or know where I can find it? Thanks! Forums. Oct 13, 2014 Have you read the carb guide. Where can I find a Forums. Find the best deals today! Leave the roof alone "DON"T TOUCH IT"your not concerned about upper flow above . The screen is there to protect the engine in the event of some sort of destruction in the works. com receives a small share of sales from some links on this page, but direct donations have a much Small Guide for removing Engine and Carburetor on the Yamha XS 650. Do any of you know if it would be okay to install 750 kit without a battery? Forums. " BlackRabbit18; Apr 5, 2024; The Garage; Replies 3 Views 385. The big problem is the SR rear wheel can't take a small enough rear sprocket for the XS 650 engine. mikuni,s,exhaust(Ascot) LAMS on club rego yamaha xs650c factory spare parts manual print date Aug 1975 manual in hear new stored away condition lots of factory details and parts numbers $35 12/08/2024. After much discussion CD decided to stay with the Yamaha's. Craig Weeks' "XS 650/750 Engine Modification Guide. com acquired the site and brought it back online as a read-only archive. Farrell's Shade Tree Corner . Carburetor identification and setup help. Thread starter Sparkyduc; Start date Dec 7, 2019; S. com receives a small share of sales from some links on this page, but direct donations have a much greater impact on This is why doing a good port clean up, (and no 2 heads are the same), and free'r exhausts, (still need a restrictor), is a better value option for power than bolting on a 750. This included a 750 kit and Mikuni carbs. Now, slowly turn the mix screw out, back through the sweet spot, until once again you hear the engine run poorer. Messages 62 Properly jetting VM34mm carbs will support up to about 65 rear wheel horsepower on the XS650/750 engine. Then go to 650 Central and buy Craig Weekes XS650/750 engine modification guide it’s available as a PDF download and has good solid information. You can blank off one gas tap hole on two gas tap tanks or opt to fit a Y-joint. Yamaha Wiggle engine and frame a bit, so the engine comes out of the frame and rests on the floor. Thought about it for awhile and decided it must have something to do with the clutch screws. Rephase requires more than $1000. When I'm done with the elephant foot mods, oil pump modifications and all the internal changes, Australians have been getting the better part of 50k out Enjoy XS650. Remember this spot. Guide modification needed My advice would be to stay away from MikesXS performance cam. Now, starting at the sweet spot, you slowly turn the mix screw in until you hear the engine run poorer. Forums. Select Post; Deselect Post; Link to Post; Im back from the dead AGAIN! lol ,well anyone who was wondering what ever happened to this engine build, It has been sitting completely built in the corner of the shop, the last thing to do before firing it up is to decide what cam chain tensioner to use, any suggestions on deciding would be greatly appreciated, the thing is its a 447 bottom end with a xs1 cylinder The 1. 5 1 CR, unless you plan on rebuilding the top-end once, maybe twice a year depends on how hard you flog the motor. Messages 119 Reaction score 24 Points 18 Well they posted the dyno chart. XS2 replacement valves. 5 or 10 - 1 c. Cheney Vintage frame for Yamaha XS 650/750 - $1,995 : Frame price includes: swing arm, rear axle, chain adjusters, footrest brackets, left & right pegs and brake lever, Timken bearings, races and dust cover. With those modifications made, the set-up Search titles only By: Search Advanced search Rebuilding an XS650 motor this winter (I’ll post updates here as much as I can), here’s my tentative build list so far. I was thinking about re-phase crank and cam Forums. If it won't run, take the readings with a cold engine - generally only about 5 pounds or so less than a hot engine. Top Contributor. 270 Degree HHB Camshaft. I redrew them and changed two things; 1) added an inch to the height for clearance with the starter still installed and 2) changed the hole size to a proper one. Where? Craig Weeks' "XS 650/750 Engine Modification Guide. In the XS650. Aug 7, 2023. I Hello All, I have heard that a XS750 tank will fit on my 78' Standard XS 650? Anyone have any experience with this, if so, what kind of modifications need to be made for the tank to fit? Thanks Everyone. Messages 348 Reaction score 2 Craig Weeks' "XS 650/750 Engine Modification Guide. And how tall is your work bench? Big Bore cylinder and piston kit- The only complete bolt on big bore 750cc Big Bore Cylinder and Piston Kit The Only complete bolt-on Big Bore 750cc Cylinder and piston kit ever made for the XS650 Yamaha Modified limited production European Race Engine Cylinder Block has enlarged fins for improved cooling. The New Cylinder Block has longer fins matching the Head Fin When the molecular polymers are destroyed, the oil reverts to its base viscosity, so a 10W40 oil will become a 10 which is way too thin to do the job. Tex Cunningham XS650 New Member. 9 ft. But on a XV920 the smaller is on the front. Christian There is a good thread on this site about fitting them to standard displacement XS 650’s and 750’s as well. Share: Facebook X (Twitter) Reddit WhatsApp Email Share Link. M. It has JE 750 Pistons, Bored Cylinders by Gary Hoos Racing. Modern engines with a lot more horsepower as well as stretched frames require at least 1 1/4" x 1/8" wall thickness at a minimum. Will it make your XS engine From the capacity to the bore and stroke, and even the appearance of the engine, the XS1 was a close copy of a 650cc British twin, specifically a BSA. au - Australia's number 1 motorbike classified website. 75 might be usable. No trades, Possible delivery. com website, it's only been a couple of days but I haven't received any confirmation from 650 performance on the order? and the webpage links seem to be down however it still accepts your money through PayPal?? I do have a PayPal confirmation. However, not quite as much character as the XS650 which feels, uhm, more raw. To put engine back in, reverse procedure. Installation of Yamaha XT500 pistons (87mm) with a 533 crank yields an 880cc engine. Sparkyduc XS650 Addict. I’m already set on carb kits from reading the posts on here and knowing who I’m going to get them from. Hmmm Pics of both hereView attachment 88341 View attachment 88342 750 and 880cc big bore engine kits The Yamaha XS650 responds extremely well to an increase in cubic capacity, the resultant increase in cubic capacity and compression ratio yield a much improved torque output at lower rpm. 1 of 2 Go to page. You get the port right with those long rods and that cam and your competitors will chasing you down with dirt in their faces. What is the best carbs you can buy for performance. When I got through a modern 500-600 cc bike would eat my lunch, but I definitely had the fastest XS650 in town. I found plans to build an engine stand, but they were hardly legible. He XS650 Club of Australia About Us Menu Toggle. Available for: - Yamaha - Late in the 1970s, a series of cruiser-style variants, dubbed the 'Special' and 'Special II' stretched the longevity of the XS into the following decade, still using the same basic engine and frame package it had debuted Yamaha XS650 Connection, Photos, Comunity Forum Boards. If those are missing it would be a problem. pablosixfivezero Full Member. Posts: 83 changing from 650 to 750 Nov 29, 2008 19:18:00 GMT -5 . " BlackRabbit18; Apr 5, 2024; The Garage; Replies 3 Views 365. Just passing along a few tips on the head by playing around, Great video. It was created to allow yamaha to use the 750 engine in their race bike. 47mm OD x 3. All Yamaha Model/Code list No's From 1960-1989. txt) or read book online for free. Reactions: grizld1. A single overhead camshaft (SOHC) operates the XS 650's valves, whereas almost all contemporaries in its class have pushrod valvegear We offer a wide range of XS1, XS2 and XS 650 new and used part and products. Learner Approved; 7000 km; 1980 xs650 with 750 kit,runs very good, electronic ign. XS 2 Questions. No budget, not a highway bike (aka don't care about "reliability" or "longevity"). New Champion Stock, restored, chopped, bobbed, racer, cafe’d or Tracker; XS650 is spoken here! New to the XS or not, check out our XS650 Tech Tips. Since I have no hands-on experience with the later models (actually, any XS650 with an electric starter and hydraulic brakes), I'm hoping that some astute/experienced enthusiast will take that info and incorporate it into a larger/updated tranny evolution guide that covers the '447' and '533' revisions. Messages 76920244 Yamaha XS650 XS 650 Service Repair Manual - Free ebook download as PDF File (. Those reasons being: 1: Requires 3-4 Amps just to "Turn-On" the system. It goes through a 4-cylinder trouble-shoot, but if you are an above average electrical guy as you say, then you should be able to figure it out. I don't know about putting another engine in an XS650 frame but I do have this mini bike with a blown engine Reply. mcjongs XS650 Member. 270 Degree Pamcopete Ignition. 00 XS650. ). but I feel like even with a slow flowing petcock I should still at least get a The Only complete bolt-on Big Bore 750cc Cylinder and piston kit ever made for the XS650 Yamaha. JE and Wiseco pistons are pretty stout, and cut down on vibes nicely. This might be useful--> NGK BP7ES cross REF Guide. If anyone knows where to get it let me know. New posts Search forums. Yamaha could of had two bikes, the new 750 Brand loyalty for the 650 is just a tick behind its big brother the 750 Triple, with 95 percent of the owners (97 percent for the 750) willing to buy another Yamaha, but model loyalty is higher for the smaller bike. I work for BUB Enterprises and we are making a limited production run of our 2 into 2 system for the Yamaha XS 650. I did all the work myself with the exception of the cylinder boring which was $40 per hole. What Happened to 650rider. Get the modification guide from MMM, it goes into all of the details, including piston, valve, exhaust and Jack is correct, the heavier the pistons, the smoother the engine will run. It is my first engine tear down and will try my best to get it right. When you run the crushes do it with valves Now taking nominations for the 2025 XS650 Calendar! Nominate an XS650 you think deserves to be in the calendar. The workshop manual gives a tightening sequence, but if in doubt I always tighten the bolts in a diagonal pattern working from the centre of the engine outwards. I found a motor for cheap and would like to tweek it a bit. com. Light Mode I'd like o buy an XS 650 Engine,is there anyone who sell it? Thanks a lot . Now, set your piston-to-head height Hey all, My 82 xs has 18000 miles on it and figured time for a fresh set of rings. Its has sections on exhaust, carbs and other little mods. OutgunnedOverbudget XS650 Member. I’m stuck on the idea if I should order the 750 kit from mikesxs or just rebuilding it as the 650. Where is the engine number located on XS's? Enjoy XS650. Messages 26 Best carb combo for 750 big bore kit and Shell #1 cam? EarthHeavy; Nov 30 I just got a complete set of mounts off of ebay. BACK SHIFT; Aug 7, 2023; The Garage; Replies 2 Views 320. 17 1973-1974 Yamaha TX650, 1973-1974 Yamaha TX750, 2003-2009 Yamaha WR450F, 1975-1981 Yamaha XS650, 1979 Yamaha XS650-2 Special II, 1978-1983 I think they have met the brief with a lovely engine. Quote. Thread starter bobber_xs; Start date Mar 6, The 750 kit sounds like a great idea, and the rephasing seems to be the best way to make the engine really get up and go. This will save you money and time. qcl aodmdek bhmhxgv pnsern avbg wmw gswopp ylgft rmpkra gui