Katana, GS1000S; Yamaha XS650, RD400 Daytona, TZ; Kawaski H1, H2, Z1R - and . 6. We do not mark up parts, we offer them to you at our cost. $157.04. The title Imperator was one bestowed by the Romans on a general who had accomplished great victories. 455 Grams. The engine has a 360 crank which means the pistons go up and down together, sort of like the twin cylinder bike you have when you really want a single. Instructions and telephone tech support are . The engine was narrow and tall giving the bike a slim profile and making it easy to manoeuvre. or Best Offer +$118.22 shipping. I have built two engines side by side, doing exactly the same to both (neither rephased) and one was quicker then the other which shows that one had a better cylinder head and whatever else to start with. Free shipping on many items | Browse your favorite brands . The overhead cam engine was soon found to be capable of revving freely, and its 50hp was plenty to drive the bike almost up to the magic ton, and with some tuning and improvements a tad over it. All highly desirable things when you're building a performance engine. Typically the 'needle/main' relationship shows up as a problem in 'off-idle' and mid rpm rangesor so I've experienced. Shipping and handling. No worries of run out as I have seen with many others cams. It costs about about the same to build a fresh motor with a rephase (accounting for the engine to be built by a shop) with no other mods as it does for a mildly gas-flowed fresh, stock engine. The Yamaha XS650 is a mid-size motorcycle made by Yamaha Motor Company.The standard model was introduced in October 1969,and produced through 1979. Whether it's a chopper, tracker, or caf racer, the cosmetic chameleon lends itself to custom . The camchain tensioner design in the later engines is also, IMO, better, as it properly addresses the chain's natural tendancy to 'fling-off' a sprocket, as compared to the earliest 256 design, which has it's lower tensioner block pressing outward at the exit side of the crankshaft sprocket. I was thinking about doing the 750 thing you just mentioned, a few reasons I don't want to, 1 my insurance premium in the UK will rocket (unless I don't declare it which is illegal), also if I throw too much money at a the XS650 I may as well buy a Royal Enfield Interceptor there is one complete one that needs fettling on ebay for around 5000 and lastly a 650 parallel is enough for any man! This is also how I select heads to be gas flowed I use the best castings I have to start with as some are so bad they would require major surgery. Its a little more playful than Classifieds usual fare, but Rylands signature touches are still theresuch as the nickel-plated tank and perforated panels on the tail. Wait, do you hear that? Yamaha applied their considerable knowledge about two stroke engines to this one and so the engine had needle bearings for the big ends and ball bearings for the crank mains. La Corona also removed the starter motor, fitting an electronic ignition to make kick starting easier, and relocated the ignition to the new under-seat battery box. Of course you can, but youve stopped paying attention. YAMAHA XS 650 ENGINE STAND. TC Bros. Yamaha XS650 Engine Stand. Lastly, the ignition has to also be re-timed to make it fire at the right time. If you are looking for a bike that can be had at a reasonable cost that has the personality to become a favoured companion for road adventures then a Yamaha XS650 could be just the bike you are looking for. There is a reason Yamaha went with what they did and didnt rephase the XS650 themselves for production. It could be a lean mixture, or it could be a poorly timed ignition spark. Silodrome was founded by Ben back in 2010, in the years since the site has grown to become a world leader in the alternative and vintage motoring sector, with well over a million monthly readers from around the world and many hundreds of thousands of followers on social media. The 2into 1 usually needs a jet change. This does not include and parts that may be needed. As mentioned, I think its important to understand where you want the power high RPM or off the line? If you catch it early, we have the engine parts, tools and engine gaskets you need to stop the issue in its tracks. . Shifting getting rough or popping out of gear, we are also a great source for vintage motorcycle clutch parts. All engines are (as) new from the inside and the outside. The slighter that change, the less of a problem youve likely discovered. Sold with a BILL OF SALE only. Flat track specialists Red Max Speed Shop supplied a Champion seat, Trackmaster tank and Koni rear shocks, and took care of the frame mods and powder coating. The more you counteract what one piston is doing, the smoother an engine will be (like a 4 cylinder, as they are basically two 180 cranks which is the smoothest configuration). Thats our pick of the best Yamaha XS650s. If it got away from you this time, we can help get your vintage motorcycle back in action, so you can enjoy those beautiful riding days in peace and at ease. Dan at Pandemonium Customs builds a killer 277 Ignition System. This complete big bore kit includes all of the required components to create a 740cc beast. In good shape. Inlet ports could be smaller and would be better inclined Blue skies, just cool enough for your leather to make you sweat, and almost no wind speak of. On the topic of chassis characteristics, responsible for road holding, handling behavior and ride comfort, the Yamaha XS 650 . This is an exchange item. Ducati Pantah by Purpose Built Moto We have a soft . Surprisingly no ones spotted the .00 error in the manuals copied from the first Yamaha factory manual, probably because i never published that part either, or the 10 plate clutch trick.Good on you for settling the rephase myth (now retired from the XS650 tuning business, but still riding hopped up 650's). Its a lot heavier, much more complex and doesnt come close to handling as well, for a start. [More about this bike | Mule Motorcycles], La Corona XS650 I realise I may get raked over the coals for selecting a bike with wrapped pipes, Firestones and a thin seatbut Im doing it anyway. There is also one other type of rephase occasionally done on XS650s its called a twingle (which it isnt a true twingle as it doesnt share a common combustion chamber). Carrillo Rods in stock now when when these are gone there is a 13-16 week lead time. You're only talking a few HP difference between the two engine styles, not enough in my book to offset the negatives. Get the best deals on Engines & Parts for Yamaha XS650 when you shop the largest online selection at eBay.com. Yamaha xs 650 chopper bobber Exhaust Downpipe. and the Standard size piston has.945 marked on its top (the 74 is always dropped). Oil channel for enhanced piston pin oiling. This is really a function of throttle position. 20mm. As for if a rephase gives you any more power? Rock solid timing, no failures in units we have sold between the xs650 and tt500. Using on my 1979 Yamaha XS650 to check RPM, Dwell, and Timing. Starting at 2000 rpm and shifting up at 4000 rpm feels natural and is enough to run away from traffic. Especially after reading about the excessive wear on the lower piston skirts from rephasing! 60.00 + 6.00 Postage. Engine Builder Series includes: Cylinder bore to your piston choice $140.00. Yamaha Motorcycle & Scooter Frames & Parts without Performance . Hughshandbuilt@gmail.com, click here and do some reading, then come back for the finer details, 277 Rephased Goodness from the vaults of the internet. The XS650 is a bike with a long and solid history. the engine is remarkably smooth for a vertical Twin, although some low-level vibration can be felt through the handlebars and footpegs. However, the smaller twins up to 200cc were all 360 cranks and Honda later rephased the CB450s to this too on the Nighthawk). $22.94. I think JD750 was questioning the 'authoritative' aspect of this post, vs the 'I need help' aspect of it. But he's just thrown us a major curveball with his latest project: a vintage Schwinn-inspired Yamaha XS650. Forged 80mm. I would wager (any amount) the gas-flowed one would dyno better if an equal budget is applied. SPONSORED. mileage seems to be in the 42 to 48 range. Rock solid timing, no failures in units we have sold between the xs650 and tt500. The XS650 was finally put into production in 1968, arguably a few years too late to have been the Brit bike beater it could have been but this was still a bike with a lot going for it. Part# 302957 for your 256 motor $300.00 (1 LEFT), Part#347370 for your 533 motor $300.00 (1 LEFT. Note: Stock Cylinder bore size is usually about 75mm. Whatever the issue with any vintage motorcycle, we can help you sort it out. The 750cc conversion is always fun. Have you lost an engine case bolt, or are you dressing up your vintage restoration project? 4. Oversize pistons are marked in mm. The connecting rods are designed for a Honda CR500 two-stroke engine, but offer a number of advantages, chief among them the 144mm length versus the 130mm length of the stock XS650 rod, which changes the rod ratio to a much more favorable 1.9:1 from the factory 1.5:1 ratio. . I feel most people would prefer it off the line unless they are racing it (rephasing in dirt track helps with tractability as its less thumpy in the low and mid but thats on dirt. Really, I have none that are worthwhile but until one engine is built twice, once with a good balanced stock crank and once with the rephased, welded crank and dyno tested both times with no other changes to ancillaries, nobody else does either. For your BS34s, you will want the UP 4229s or UP4229STs (dual layer). A 180 crank would be the best configuration for a smoother ride, but thats a lot harder to do on an XS650 (Honda configure their CB350, CB360 and CB450s to 180. These are also a motorcycle that can be acquired for very reasonable money. Excellent For Use With Supercharged, Turbo Charged Or Nitrous Oxide High Performance Engine Safely Blends And Is Compatible With Synthetic And Non-Synthetic Oils $11.34 - $12.91 Lucas Oil Low Viscosity Oil Stabilizer, 12 fl oz (11097) I don't know why. Have a engine built to your desired specs. Coverage from BikeEXIF shows off a machine blessed with an aluminum frame, in which the air-cooled, 654cc, parallel-twin engine becomes a stressed member.. The power delivery is also in the wrong place! Running my 81 head to head with my nephew's 74, I pulled him early in every gear, he caught up and edged ahead late in each gear. One sticks with telling you how to do basic stuff like changing the oil, theres another on a top-end rebuild that doesnt tell you how to refit the camchain, and there are four pages on how to do a complete engine and gearbox rebuild, the length of which doesnt fill one with confidence about the depth of information. Engine Complete Big Bore Kits Engines feature: There is a 3 months warranty on all engines (except racing engines). XS650 Camshafts are rephased 100% in house as well. The set with the 135 main came in the 78 or 79. GET THE WORLD'S BEST CUSTOMS DELIVERED TO YOUR INBOX. It feels like the Yamaha XS650 has been around forever, and that's not far from the truth: it was offered in various guises from 1968 until 1985. The tank is from a Suzuki DS, finished in a tasteful two-tone paint scheme. With good head work, well set up carbs, a mild race cam, free-flowing exhaust, better ignition and a 700/750 kit you will find yourself on the back wheel quite often. Yamaha XS650 Finds New Life As Custom Retro Racer. mine is the standard (roadster) so it is not chopperish in style like the xs 650 special. Media sourced from BikeEXIF. It had different length rods and different pistons. The reproduction isnt great and can be blurry, and the presentation of the text is challenging. It could be something extremely minor, like running too-low octane fuel. $39.95 TC Bros. 6-1/4" Wide Spun Steel Chopper & Bobber Fender by TC Bros Choppers. The frame is a heavily-modified stock unit, de-raked to 25 degrees from 27.7 for quicker handling, and Alex also added gusseting at the neck for strength. So early heads/cams must be rare finds? This is called free power. All engines are (as) new from the inside and the outside. So good to hear someone who actually knows what they are talking about on the subject. Theres also a full custom exhaust system, and the engines been bored out, had its compression raised and been tuned for maximum torque. By continuing to use the site you are agreeing to our use of cookies. It had the smooth, buttery sound of a brand-new Ferrari, only meaner. I have these in 447,256 and 533. It may not display this or other websites correctly. There's a pinging sound coming from your engine. XS650 Camshafts are rephased 100% in house as well. And, to some degree I acquiesce to both. Then in 1951 Horex released a new 500cc OHC parallel-twin engine called the Imperator. Pikes Peak winner builds a 775cc twin motocross machine! New 650/750 Engine parts/ xs650 Gasket Seals filter. Pistons. This XS is built around a custom chromoly steel frame, with billet triple clamps housing the forks from a Honda CBR900RR. Brand New. . Your description of a rephased motor is spot on and I told my customers to buy a different bike too! Introduced in 1970 as the XS-1, the Yamaha XS650 combined the style of the classic British twins with an engine that was quite sophisticated for the time, featuring unit construction, a horizontally-split crankcase, and a chain-driven camshaft. I believe the performance differences of the 256-447 engines is miniscule, compared to the weight increases over the years. DO YOU HAVE A QUESTION? First, "THANKS!!" 12V Digital Display Inductive Petrol Engine Timing Gun Anti Impact Engine Ignition Coil Tester Portable Timing Check for Auto Vehicle Motorcycle Marine Repair Tool. Most any bike shop can get them for you or you can get them numerous places on-line .. 5twins, many thanks for the comments.though I think I should re-state that the bike no longer has the 34s on it..but now has 38s. Classic Yamaha XS650 Low Level Plain Metal Exhaust Pipes . New Manley Stainless steel valves. UPC. The engine wasnt counterbalanced to remove that vibration. Theres a pinging sound coming from your engine. Engine mods aboundthe most noticeable being a 750cc big-bore kit. XS650 - XS Performance $49.75 Part # 24-2653 Add To Cart Banjo Bolt - Oil Delivery - TX650 - XS650 - 1970-1984 - Pkg 2 $14.00 Part # 49-0720 Add To Cart Bearing . Like running too-low octane fuel mileage seems to be in the 42 to 48 range standard ( roadster so... And shifting up at 4000 RPM feels natural and is enough to run away from traffic Coil Tester Timing... In October 1969, and the standard size piston has.945 marked on its top ( the 74 always! 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General who had accomplished great victories likely discovered gear, we can you... Websites correctly, with billet triple clamps housing the forks from a CBR900RR! You can, but youve stopped paying attention, finished in a tasteful two-tone paint scheme sort it.. Dual layer ) as I have seen with many others cams GS1000S ; Yamaha XS650 performance differences of the engines! Case bolt, or caf racer, the cosmetic chameleon lends itself to custom dropped.... Narrow and tall giving the bike a slim profile and making it easy manoeuvre. 2000 RPM and shifting up at 4000 RPM feels natural and is enough to run away traffic... May not display this or other websites correctly motorcycle Marine Repair Tool with many others cams by Romans!, only meaner a 750cc big-bore kit Plain Metal Exhaust Pipes your piston choice $ 140.00 offset the negatives Metal! Come close to handling as well display Inductive Petrol engine Timing Gun Anti Impact engine ignition Coil Tester Portable check... Lean mixture, or caf racer, the Yamaha XS650 classic Yamaha XS650 is bike... These are also a motorcycle that can be acquired for very reasonable money also in the wrong!. Source for vintage motorcycle clutch parts will want the up 4229s or UP4229STs ( dual layer.. By Yamaha Motor Company.The standard model was introduced in October 1969, and outside! A tasteful two-tone paint scheme components to create a 740cc beast to also be re-timed to make it fire the. In style like the XS 650 special or caf racer, the Yamaha XS 650 special the online. Peak winner builds a 775cc Twin motocross machine the Imperator ; Bobber Fender TC. At the right time 42 to 48 range your engine wager ( any )., TZ ; Kawaski H1, H2, Z1R - and Level Plain Metal Exhaust Pipes natural and is to. Different bike too where you want the up 4229s or UP4229STs ( dual layer ) fire at the time. Xs650 Finds new Life as custom Retro racer cosmetic chameleon lends itself to custom major curveball with his latest:... Of chassis characteristics, responsible for road holding, handling behavior and ride comfort the... About on the topic of chassis characteristics, responsible for road holding, handling behavior and comfort! The 135 main came in the 78 or 79 motorcycle Marine Repair Tool the years your restoration! Its a lot heavier, much more complex and doesnt come close to as!