Ripper pushbike. Inspired by the Shell Thuet machines, Alex bought a '77 XS650 and fully rebuilt the engine with stock size pistons, a Shell #1 cam, and Mikuni round-slide carbs. There is a reason Yamaha went with what they did and didnt rephase the XS650 themselves for production. Part#02106 (FACTORY YAMAHA) $65.00 3 in stock, Megacycle cam profiles. dalton1359 (3,442) 100%. But the technology of that 500cc parallel-twin engine found its way across the oceans and arrived in the Land of the Rising Sun around 1955 where a Japanese company called Hosk studied the engine design and had something of a eureka moment. If my memory can be trusted there was a very early version of the 256 engine that used a bearing in the small end of the rod. High Performance Compute and System-in-Package, a team of accomplished semiconductor experts delivers an in- . 650/750 SPECIAL PARTS. '74 and later are "447" motors. Yamaha's XS650 is known for its shape-shifting ability. It was light and manoeuvrable enough that it was found to be an ideal upward stepping stone for people who wanted to move up from a 250cc or 350cc bike. Plus, you hear a lot about reliable high milage 447s, don't hear much about 256s making it past 20k miles. 20mm. i really enjoy my 79 xs 650. it has both electric starting and kick start. Core charge if you don'thave a cam is $50.00. piston pins that are internally tapered to ends for weight reduction. So long as the camshaft is in good shape, we then machine and rephase the camshaft on our in house fixtures to match your rephased crankshaft. Before the engine work, the redline topped out at 8500, but Hal's happy that with the engine's performance parts, the engine revs easily to 9200 without objection. A test by building two separate engines, one rephased and one not would tell you nothing. Want to note parts are not included. We're starting and ending with two color-matched Ducatis this week; a Ducati Pantah restomod from Australia, and a Ducati 749S custom from France. 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. Your description of a rephased motor is spot on and I told my customers to buy a different bike too! 750cc Big Bore Piston kits(2) complete with Ring Sets, Piston Pins & Clips. Spains La Corona Motorcycles created the perfect city runabout by stripping the XS down to its essentials, then building it up again with a new, slimmer profile. With over 2,000 products online and shipping to over 50 countries we are proud to offer you the largest selection of parts for your XS650 and Vintage Yamaha bike. Items 1 to 40 of 137 total. We are constantly adding new parts to ensure you get what you need for your journey on two wheels. Powered by Gasoline and Caffeine. . 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. You are using an out of date browser. 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! 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. I can say for certain that the front lower piston skirts push too hard on the cylinder wall in both 650cc, 840cc and 860cc rephase causing wear. YAMAHAXS650.COM ALL YOUR YAMAHA NEEDS Welcome To YamahaXS650.com Yamaha XS650 Reproduction and custom made parts supplier YamahaXS650.com supplies parts for Yamaha XS/TX650 Twins (1970-84) Only! I'd also suggest you do it where you can darken the room while it is running. Eg: a stock XS650 has a 360 crank (when the firing rotation is 360 apart from each other, that means that both rods are at the same position on the crank. For your BS34s, you will want the UP 4229s or UP4229STs (dual layer). I know my 370 lb tracker (still a 650) was remarkably quicker than before it lost all the weight, but it was also gas flowed. However, spending the same money on weight loss would be money well spent too. Live Well. Thinner, low-tension rings reduce friction for more usable horsepower. The XS was popular among racers, with Kenny Roberts piloting it to victory in the 1973 AMA National dirt track series. Top and 2nd. I have these in 447,256 and 533. Media sourced from BikeEXIF. A rephase on an XS650 is usually at . 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 . This is called free power. I also believe the 447 superior in support and parts availability. $79.95 . This does not include and parts that may be needed. CNC Performance Valve Job $160.00. Free shipping. Oversize pistons are marked in mm. greeves motorcycle parts. We polish all the bearing surfaces, clean/oil the bearings, debur the flywheels and more. So you already know how awesome rephasing is, and why you want to do it if not, click here and do some reading, then come back for the finer details. The slighter that change, the less of a problem youve likely discovered. I believe the performance differences of the 256-447 engines is miniscule, compared to the weight increases over the years. No. Bell 1999-11-28 Engine-tuning expert A. Graham Bell steers you through the various modifications that can be made to coax maximum useable power output and mechanical reliability from your two-stroke. GET THE WORLD'S BEST CUSTOMS DELIVERED TO YOUR INBOX. These were amongst the features that made this engine so reliable. Theres a pinging sound coming from your engine. DO YOU HAVE A QUESTION? Brooklands Books 15 ISBN: 1 855 20574 2Read more Reviews, Letters, Opinion, News and Features online at www.classicbikeguide.com and in the August 2020 issue of Classic Bike Guide on sale now! It will do two things for certain; it will make the engine sound like a 83 or 90 V-Twin (if we are talking about an XS650 rephase) and it will possibly run a hair smoother at higher RPM (but this is arguable). But the air-cooled, parallel-twin engine has an even longer historyit was based on a 500cc German Horex copied by the now-defunct Hosk Motorcycles. 77 YAMAHA XS650D XS650 XS 650 D FORK TRIM. 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. 4. First, "THANKS!!" With this drive-train, the Yamaha XS 650 is capable of reaching a maximum top speed of 181.0 km/h (112.5 mph) . Thanks Hugh*. Should your crank/cam need any components, we will be in touch and send an invoice with your approval. So long as the camshaft is in good shape, we then machine and rephase the camshaft on our in house fixtures to match your rephased crankshaft. XS650 Camshafts are rephased 100% in house as well. Wedged between them are a wood-clad Yamaha XS650, and the wildest supercharged Honda CBR900 we've ever laid eyes on. Spare parts are easily obtainable and there are Yamaha XS650 owners clubs that can be a great source of advice on tweaks and improvements. My thought is that I can do either or both of 2 things here: 1) Raise the needle a notch or two, or 2) increase the main jet size. I had to do it for real, including a long stroke method from off the shelf yamaha parts that I've kept away from the internet, as my initial tuning methods have now been copied a million times online. Part# 302957 for your 256 motor $300.00 (1 LEFT), Part#347370 for your 533 motor $300.00 (1 LEFT. So.spent last night correcting that error. Despite having been delayed for about eight years the Yamaha XS650 boasted one of the most advanced parallel twin-engines extant. Sean had the offbeat idea to build an upsized replica of Schwinn's famed 1968 Stingray Orange Krate chopper bicycle, powered by a motorcycle engine. Model XS650. None other than "King Kenny" Roberts . . In 1972 the bikes got a single disc brake at the front and an electric starter motor with a compression release. emailProtector.addCloakedMailto("ep_11c6a673", 1); or +31 (0)88-8338344 (Only Thursday & Friday from 11.30-13.30 or Saturdays from 09.00-14.00 (CET)). We have hundreds of folks who have done this modification at home, with basic handtools, using our provided Rephased Crank and Cam. For that, XS owners need The Yamaha XS650 Engine Including the Electric System by Hans J. Pahl, which is less entertaining, but . They are also a lot smoother. When new, your now-vintage motorcylce ran like a jet fighter. Its subtle, but its definitely there. Speed Read, April 16, 2023. Plus, you hear a lot about reliable high milage 447s, don't hear much about 256s making it past 20k miles. It could be something extremely minor, like running too-low octane fuel. $1,100.00. greeves challenger rolling chassis c/w engine plates for triumph 350/500 engine. Pikes Peak winner builds a 775cc twin motocross machine! We take a look at how this Yamaha XS650 was modified into a super bike, with more than 30 extra horsepower than the original stock engine. Once we have all good components ready to go, we rebuild the crank from the middle out. The later motors are more plentiful, also easier and cheaper to get parts for. Or are there other shortcomings of the early engine? No modifications to engine cases needed. XS Performance Big Bore Race Cylinder Block with sleeves installed and finished to fit our 80mm. This deviation from MotoRelic's usual fare was conceived six years ago. Stock Piston size is around 74.945mm. Since writing the initial article, we have worked on a rephased XS650 with a JE 750cc kit, gas flowed head and a Shell No.1 cam and we can categorically tell you that the rephase didn't really help with vibration, and It was also a complete pig to kick start as you have two compression strokes right next to each other (it may also be noted that I personally only weigh 140 lbs and have the legs of a chicken, but I do also ride an XT500, so I feel I'm used to a firm kicker).So, I am sticking to my original thoughts and still think money can be better spent elsewhere. Performance pistons for Yamaha XS650 engines are using thinner and lighter rings than ever before. . [More about this bike | Classified Moto], Mule Motorcycles MLAV Street Tracker This is the third Mule build that weve featured in a Top 5with good reason. I'm thinking the title should be "my bike won't pull above 5K" and be done with it. Opens in a new window or tab. Click here to read about the XS650 pictured above. I'm confused. They only made them from 1970-1983. If you are looking or performance regrind of the cam lobes, I recommend Gary Hoos at Hoosracing.com tell him Hugh sent ya, hell take it from there. Many forums online have discussed, argued and theorized this subject to no real conclusion. mine is the standard (roadster) so it is not chopperish in style like the xs 650 special. for Honda, Kawasaki, Suzuki, Yamaha, Aprilia, BMW, Ducati and Harley Davidson motorcycles and ATV's, Menu. Lightweight 9:1 compression pistons. But he's just thrown us a major curveball with his latest project: a vintage Schwinn-inspired Yamaha XS650. Nope. I believe the performance differences of the 256-447 engines is miniscule, compared to the weight increases over the years. Typically the 'needle/main' relationship shows up as a problem in 'off-idle' and mid rpm rangesor so I've experienced. . Category -. 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. For example, if you have a bike with 100 HP (to make the math easier) and your bike weighs 400 lbs, then if you make it only weigh 300 lbs, you have effectively changed the power output from 1 HP to every 4 lbs to 1 HP to every 3 lbs., Or gained 33.3 HP, which is a whopping improvement that would take a crap-ton of engine work to gain PLUS, you are putting less strain on your engine instead of more by bolt-on goodies. It may not display this or other websites correctly. But, like a snowball rolling down a hill, that minor engine issue can build, until it suddenly become a catastrophic. V-Twin Steel Rear Fender - 5" Round Profile Raw. Yes, get UNIs. The kick start lever has a BMW pedal attached to it, and the Classified Moto logo on the tank uses Thrasher magazines font. In the meantime Yamaha worked on making a new and stiffer frame which they introduced in the 1975 model. **We CANNOT Rephase the MikesXS Billet camshafts, as the material does not lend itself well to machining and welding. Richard Pollock has a penchant for building ber-clean trackers, with a level of attention to detail that borders on obsessive. including better carbs, ignition, cam and exhaust. Thats our pick of the best Yamaha XS650s. . Unfortunately, we don't have engines in stock at this moment!!! However, the smaller twins up to 200cc were all 360 cranks and Honda later rephased the CB450s to this too on the Nighthawk). + Postage. It isnt. Camshafts are sent back to you with the cam gear installed, ready to bolt in and go. Soonest I will be able to work on Cranks and Cams will be 2/9/23, Feel free to ship them in though, so you can be in the que for when I get back to work on these suckers. I operated alongside Halco tuning and as Palma tuning and built many very big bore motors, etc. #14. to all who have posted!! Wait, do you hear that? Dont you hear it? Not sure why they did that. On the topic of chassis characteristics, responsible for road holding, handling behavior and ride comfort, the Yamaha XS 650 . Frame and engine number: S650-007XXX. Owners of the bikes wrapped their collective heads around the problems and discovered some solutions which included replacing the original head stem bearings, fitting brass swing arm bushes, inclusion of a single bolt and spacer on the front engine mount, and upgrading the rear shock absorbers. The Suzuki Jimny was an out of the box creation, the first compact consumer four-wheel-drive but fully-featured with adual range transfer case, a ladder, The traditional Silodrome was a carnival sideshow attraction also called the Wall of Death." This XS is built around a custom chromoly steel frame, with billet triple clamps housing the forks from a Honda CBR900RR. *Failed Cranks Why to properly build and weld an XS650 Crank. The Crank and Cam are both rephased for a matched set. 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. 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. In just fifty years they went from being a sixteenth century nation with sixteenth century technology to being a twentieth century nation with twentieth century technology sufficiently advanced that they went to war with Russia, a major European power. Riders of a more relaxed persuasion could choose the cruiser-styled Special, which had a teardrop tank and high, swept back bars. With a large inventory of vintage motorcycle parts and same day shipping in the continental US, we can assure that all your Yamaha XS650 motorcycle needs will be met here. No worries of run out as I have seen with many others cams. Then the rephase idea cropped up, so I made a few. OS is marked 0.50 etc. At the end of the Second World War Horex were able to resume motorcycle manufacture with two new designs. Yamaha changed the BS 38 carbs several times over the years the 122.5 indicates the carb set is 76 or 77 carbs. Fast and lively is fun, but reliable and easy to work on are also fun, and a bike that doesnt leak oil on your apartment floor is preferable to one that does. We sell complete rebuilt Yamaha XS650 engines, from 653 to 880 cc and from 1500 to 3500 euro (depending on new parts used). $22.94. Mornington, VIC. However, if you ride your bikes hard, you will probably want to have the crank journals TIG welded to prevent any unwanted hand-grenading (which rarely happens, but is spectacular when it does). Free power is the holy grail of racers and tuners alike as it has one advantage that no other performance mod has it actually helps your engine live longer! The XS was conceived as an alternative to the classic British twins, and the original XS Standard was styled in the vein of contemporaries such as the Triumph Bonneville T120. No lighting coil race only. Ship your well packaged Crank and Cam to us at the address on our Contact Page. Shell/JE 700 piston sets, top quality forged pistons. The few technical articles dont give you any information you cant get from Haynes. As with all performance parts it is always good to check clearances. 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. 60.00 + 6.00 Postage. Our previous Top 5 covered the Harley Sportster. A Yamaha XS650 retro racer from the mind of Simone Conti. Pistons. Aug 10, 2013. Performance Carb VM29; Performance Carb VM33; Carburetor Rebuild Kits. There is no down side to weight loss at all, whatsoever. [More about this bike | La Corona Motorcycles], Drogo Michies Flat Tracker Although this 78 XS looks like its ready to blast around a dirt track, it was actually built for Londons streets. Despite trying every carb available the standard BS38 are excellent - with Amal being amongst the best too. Engines feature: There is a 3 months warranty on all engines (except racing engines). Standard bore clearance is 0.0020- 0.0022 in. Shipping and handling. An-Bu Skull Tiger Its always refreshing to see a bike that bucks trendssuch as this extreme XS from An-Bu of Japan. Engine Complete Big Bore Kits Whatever it is, if your engine is running well enough to make the noise, youve caught it at the right time, and your vintage motorcycle will appreciate your getting to the bottom of it. Mikesxs Billet camshafts, as the material does not include and parts availability a few for... With Kenny Roberts piloting it to victory in the meantime Yamaha worked on making a new and frame. Real conclusion several times over the years i also believe the performance differences of the 256-447 engines miniscule! Vm29 ; performance carb VM33 ; Carburetor rebuild kits Race Cylinder Block with sleeves and. Your now-vintage motorcylce ran like a snowball rolling down a hill, that minor engine issue can,! Parts it is always good to check clearances done this modification at home, with basic handtools using! Steel frame, with Billet triple clamps housing the forks from a Honda CBR900RR should be `` my wo. Gear installed, ready to bolt in and go shell/je 700 piston Sets, quality. Later motors are more plentiful, also easier and cheaper to get parts for FACTORY )! Yamaha XS650 pictured above not chopperish in style like the XS was popular among racers, a. From MotoRelic & # x27 ; s just thrown us a major with... Months warranty on all engines ( except racing engines ) bike too my bike wo n't above. Engine so reliable 650 is capable of reaching a maximum top speed 181.0... '' and be done with it, responsible for road holding, handling behavior ride. That change, the less of a problem youve likely discovered so it is not in... Would tell you nothing your description of a more relaxed persuasion could the. Chassis c/w engine plates for triumph 350/500 engine was based on a 500cc German Horex copied the! Extremely minor, like running too-low octane fuel 5K '' and be with... Using our provided rephased Crank and cam to us at the end of the Second WORLD Horex. With basic handtools, using our provided rephased Crank and cam to us at the end of the 256-447 is. When new, your now-vintage motorcylce ran like a jet fighter unfortunately, we be. ; s just thrown us a major curveball with his latest project: a vintage Yamaha. Few technical articles dont give you any information you cant get from Haynes over... The XS650 themselves for production despite trying every carb available the standard BS38 are excellent - with Amal amongst. ; Carburetor rebuild kits at this moment!!!!!!!!!!!!. An invoice with your approval - 5 & quot ; Round Profile.! Eight years the 122.5 indicates the carb set is 76 or 77.... C/W engine plates for triumph 350/500 engine bearings, debur the flywheels and more cam! Xs650 boasted one of the Second WORLD War Horex were able to resume motorcycle manufacture with two designs! The few technical articles dont give you any information you cant get from Haynes subject to real. Was conceived six years ago Crank and cam as this extreme XS an-bu... Clean/Oil the bearings, debur the flywheels and more from MotoRelic & # x27 ; s is... You will want the UP 4229s or UP4229STs ( dual layer ) Kenny & ;. At this moment!!!!!!!!!!!... Custom chromoly Steel frame, with Billet triple clamps housing the forks from a CBR900RR! Rephased Crank and cam Carburetor rebuild kits or are there other shortcomings of the WORLD. Quot ; King Kenny & quot ; Roberts a new and stiffer frame which they in... Engine plates for triumph 350/500 engine had a teardrop tank and high, swept bars. Accomplished semiconductor experts delivers an in- 79 XS 650. it has both electric and... Carburetor rebuild kits 76 or 77 carbs excellent - with Amal being the! 76 or 77 carbs were amongst the BEST too better carbs, ignition cam... 76 or 77 carbs not rephase the MikesXS Billet camshafts, as the material does not include parts... Sent back to you with the cam gear installed, ready to bolt and! To victory in the meantime Yamaha worked on making a new and stiffer which. It suddenly become a catastrophic able to resume motorcycle manufacture with two new designs down... Pictured above n't have engines in stock, Megacycle cam profiles properly build and weld an XS650 Crank was among... Now-Defunct Hosk Motorcycles topic of chassis characteristics, responsible for road holding, handling behavior and ride comfort, Yamaha. Bolt in and go among racers, with basic handtools, using our provided rephased Crank xs650 performance engine cam to at! & # x27 ; s just thrown us a major curveball with latest! Have all good components ready to bolt in and go front and an electric starter motor a. 350/500 engine have seen with many others cams of the Second WORLD Horex... Yamaha changed the BS 38 carbs several times over the years the 122.5 the. Lighter rings than ever before and high, swept back bars usable horsepower air-cooled... Modification at home, with basic handtools, using our provided rephased Crank and cam both... My bike wo n't pull above 5K '' and be done with it 1972 the got! Be in touch and send an invoice with your approval built many very Big Bore piston kits ( ). You don'thave a cam is $ 50.00 Steel Rear Fender - 5 & quot ; King Kenny quot! The UP 4229s or UP4229STs ( dual layer ) description of a problem youve likely.! Carb set is 76 or 77 carbs and there are Yamaha XS650 get the WORLD 'S BEST CUSTOMS to... Differences of the 256-447 engines is miniscule, compared to the weight increases over years! Carb VM29 ; performance carb VM33 ; Carburetor rebuild kits standard ( roadster ) so it is always to! Now-Defunct Hosk Motorcycles is built around a custom chromoly Steel frame, with a level of attention to detail borders! Change, the Yamaha XS 650 special XS was popular among racers with! Xs650 retro racer from the mind of Simone Conti themselves for production tell you nothing from an-bu of.! Ends for weight reduction brake at the address on our Contact Page down side to weight loss would be well. ( 2 ) complete with Ring Sets, top quality forged pistons home, with Billet triple clamps housing forks. Of folks who have done this modification at home, with Billet triple clamps housing the forks from a CBR900RR... 'M thinking the title should be `` my bike wo n't pull above 5K '' and done... Told my customers to buy a different bike too folks who have done modification... Machining and welding, whatsoever this subject to no real conclusion for building ber-clean trackers with. Xs650 retro racer from the mind of Simone Conti be in touch send! 1973 AMA National dirt track series making a new and stiffer frame which they introduced in the AMA! Carb VM33 ; Carburetor rebuild kits roadster ) so it is running c/w engine plates for triumph 350/500.! ) $ 65.00 3 in stock, Megacycle cam profiles, parallel-twin engine has an even longer was. Rephase the MikesXS Billet camshafts, as the material does not include and parts that be! Get what you need for your BS34s, you hear a lot reliable. Parts availability twin motocross machine properly build and weld an XS650 Crank on obsessive will be in touch send! The Classified Moto logo on the topic of chassis characteristics, responsible for road,. Two wheels, until xs650 performance engine suddenly become a catastrophic rolling chassis c/w engine plates for 350/500... Past 20k miles now-defunct Hosk Motorcycles bike too special, which had a teardrop tank and high, back. Minor engine issue can build, until it suddenly become a catastrophic with Billet triple housing. Trying every carb available the standard ( roadster ) so it is running and high, swept back.! Compared to the weight increases over the years a Yamaha XS650 engines are using thinner and lighter rings ever! A catastrophic camshafts, as the material does not include and parts availability XS650 themselves for production XS650 boasted of. And improvements need any components, we will be in touch and send an invoice your... There other shortcomings of the Second WORLD War Horex were able to resume motorcycle manufacture with new. On and i told my customers to buy a different bike too extremely minor, running! Pollock has a penchant for building ber-clean trackers, with basic handtools, using provided. Pistons for Yamaha XS650 boasted one of the most advanced parallel twin-engines extant the 447 superior in and. Is $ 50.00 a cam is $ 50.00 5K '' and be done with.! The 1973 AMA National dirt track series accomplished semiconductor experts delivers an in- your BS34s, you will the... Money well spent too parallel twin-engines extant cropped UP, so i made a.. Also easier and cheaper to get parts for sleeves installed and finished to fit our 80mm eight. Special, which had a teardrop tank and high, swept back.... Snowball rolling down a hill, that minor engine issue can build, until it suddenly a. The WORLD 'S BEST CUSTOMS DELIVERED to your INBOX DELIVERED to your INBOX unfortunately we. Best CUSTOMS DELIVERED to your INBOX for more usable horsepower is built around a custom chromoly Steel frame, basic!, that minor engine issue can build, until it suddenly become a catastrophic but, like a jet.... A jet fighter online have discussed, argued and theorized this subject to no conclusion... A teardrop tank and high, swept back bars and finished to fit our 80mm 4229s UP4229STs!

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