Yamaha rd 350 ypvs engine tuning book

The 250 350 part is actually only about 6mm shorter than the top edge of the 500 kicker as in use it sits about 5mm above the 250 350 arm to allow for the oem washer and clip fixing, this means the majority of the 250 350 pivot arm is in use when fitting the 500 unit, this got me thinking about the mechanical strength of the joint and how much. I sold my rd 350 in order to purchase a new harley davidson fxe 1200. Originally it produces 4750 bhp all bhp figures on this site are rear wheel figures unless other is written, and with some simple modifications that i will describe on this site when i get the time you can raise that to 5565 bhp. Routine maintenance tuneup procedures engine, clutch and transmission repair cooling system fuel and exhaust emissions control ignition and electrical systems brakes, wheels and tires steering, suspension and final drive frame and bodywork wiring diagrams yamaha. Genuine yamaha rd250lc rd350lc rd350ypvs reflector 44985102. Yamaha debuted their breakthrough ypvs power valve system. The water jacket maintained a constant temperature and allowed the engine to be in a higher state of tune without loss of reliability.

Yamahas rz350 has a real place in the history books, heres what to look out for. Yamaha debuted their breakthrough ypvs power valve system that revolutionized the twostroke engine in the rd350 ypvs of 1983. Yamaha power reed kit rd350 ypvs motorcycleatv boyesen 732. Yamaha rd 350 dyno modified rd350 yamaha top 12 modified yamaha rd 350 2019 latest this video will show you the best of modified and customized yamaha rd 350s. Gallery, model history, stories, specifications, guest book, links and art work. Yamaha rz350, rd350lc motorcycle history, classics. With ratios optimized for racing, this gearbox will make for a large improvement in acceleration and top speed on the track. Do not start to widen the intake and exhaust port at first. A total of 43 parts lists are found for the rd350lc 1982 4l0 europe 214l0300e1. Its a great bike and like the rd350, it can still evoke the classic yamaha cult feeling that the rd had. This reduces the ignition advance required to get complete combustion, which reduces the powerrobbing part of the engine cycle just like we wanted. However, yamaha added liquid cooling and made other modifications in porting and exhaust. Yamaha rd350 ypvs bottom end engine parts, rd350 ypvs.

If you mill inlets and outlets of the barrel, absolutely used eye and respiratory protection. On the oem ypvs and lc engines there is a thermostat housing setup built into the top of the oem head, and the outlet from that exits straight up. Integrated ypvs and loads of power in a lightweight package the rz350 packed a serious punch against many of its bigger cc brothers. Only needed on high horsepower engines a lock up clutch will prevent clutch slip at high horsepower. The procedures used to evaluate this engine can be applied to any 2 stroke engine you wish to evaluate. This site is dedicated to the twostroke twin cylinder 350 ypvs. I can still smell the exhaust fumes thirty years after i sold it. Its a fantastic looking bit of kit and has the performance to match as its a proven race winning bike in recent years. Result power boost is about 200 rpm earlier max 5% more power the extension of the outlet is often hailed as the most important measure. Yamaha rd350 ypvs is a motorcycle that yamaha made from 1983 to 1986. Front brakes ap lockheed race caliper with tz disk and stock yamaha cylinder. The yamaha rd s were so popular back in the 80s and as the article states were a sensational bike to ride.

With the engine back together i wanted to make sure the timing was correct, on the rd it. The tz dry clutch and gearbox fits in with little trouble. This bike will be used to compete in the post classic 750cc clubman class with crmc, and also various other trophy races the crmc put on throughout the season. Yamaha rd 350 lc ypvs 83 84 sbs front ceramic brake pads oe quality 550hf. Jan 30, 2012 the tzr 250 did carry on the embodiment of the early ypvs, but the miniature engine was a completely fresh design with more in common, parts wise, with the rd500lc than the 350 twin. Yamaha rd tzr dt 125 250 350 zweitakter twostroker twostroke tuning. Sep 23, 2010 yamaha rd 350 ypvs and yamaha rd 500 v4 together duration. Available to special order, a billet lock up clutch assembly, and outer casing for the yamaha ypvs 350. Honda cbf suzukie sv 650 honda vfr 750 yamaha rd 350 ypvs posted july 14, 2012 hi and i am trying to get a picture of the wrangler proam colours used it was blue and white with yellow decals. New model and coloring with only a little number of common parts with the old lc with new ypvs engine with thermostat, new exhaust bigger volume, new frame, new front fork air assisted, new rear suspension monocross instead of cantilever, new swinging arm, new slotted triple disc brake with rear disk instead of drum, new wheels with tubeless tires, new fuel reservoir, new seat. Quite simply the most fun one can have on the street. This yamaha boyesen motorcross power reed kit will fit all models rd 350 ypvs wsm 732 e please be advised that the reeds pictures are generic pictures and does not reflect actual set of reeds all kits include enough reed sets for one motor, order one kit for one motor.

The standard gearbox is fine with 3 tz 750 clutch springs thats all i do. This model was not officially sold in the us but was available in neighbouring canada. I thought id change the float needle valves and seats in both carbs and try to fix the vacuum tap, which. Yamaha rd 250 350 ypvs job lot dont need anymore so selling for just 101. Since as ever i wanted to do this engine right, i decided that i had to engineer a proper solution to get the outlet to run up at 90 degrees to how it was exworks, and it had to be done in a. After watching this, be sure to see my flyby vids the area in the upper cases where the transfer ports meet was protruding into the transfer ports by about an eight of an inch. Yamaha rd350lc 1982 4l0 europe 214l0300e1 parts lists and. Much more important are the measures below the piston. Pommie rejets his rd350lc and teaches us plug chops, timing and jetting plus fits dna filters. It was launched at the cologne motorcycle show as the nearest thing to a road going racer ever produced it had a paralleltwin twostroke engine with identical bore and stroke of its predecessor, the yamaha rd350lc. The end of japanese production in 1992 saw the type re hashed and manufactured in brazil, all parts still fit but as previously mentioned build quality leaves a. All engine development is done exclusively with tsr twostroke. Yamaha rd350 ypvs engine parts top end yamaha rd350ypvs engine parts bottom end.

A version of the engine without ypvs was used in yamahas banshee atv. Yamaha rd 350 for sale south africa enter your email address to receive alerts when we have new listings available for yamaha rd 350 for sale south africa. Yamaha rd 350 ypvs angelfire the yamaha rd 350 powervalve. Pommies yamaha rd350lc by tony wilding 2 years ago retro 80s to 2000s, custom, tech tips. This software packages may also be available on the internet as the first book is quite old. The yamaha rd350lc was a twostroke motorcycle produced by yamaha between 1980 and 1983 although it immediately succeeded the larger rd400, the rd350lc was powered by a smaller 347cc parallel twin twostroke engine which actually had the same bore and stroke as the older rd350 64 x 54mm. Hydroformed gibson stainless pipes with alloy toomey silencers. A worked example is provided for my old yamaha rz350 29k, 1985, which is almost identical to he yamaha rd350ypvs lcii 31k. It had a paralleltwin twostroke engine with identical bore and stroke of its.

The largest parts list footrest contains fiftyfour products for this rd350lc 1982 4l0 europe 214l0300e1. Tuning of an rd 250 350 twostroke engine 7386 tuning. Click the images for more technical information relating to your rd yamaha. Rd350lc 1982 4l0 europe 214l0300e1 section with fortythree other schematic pages. Five star customer service and parts delivered fast. Considerably more hitech than anything before, the powervalve won many a heart, and race too, in more modern times, as people flock to elsie ownership, it may lag behind in the desirability stakes, but the ypvs is still an attractive proposition for restoration. The chambers is the single most important thing when it comes to tuning the 2stroke engine. I only wish that yamaha had solved the plug fouling problem by equipping the rd 350 with a stronger ignition systemcoils. Front engine mount rubber damper to fit the yamaha rd350 lc and yamaha rd350 ypvs all years genuine yamaha part number 4l01531600 and 2gu1531600 these get hard with age, and usually get destroyed if you have your cases powder coated. The tzr 250 did carry on the embodiment of the early ypvs, but the miniature engine was a completely fresh design with more in common, parts wise, with the rd500lc than the 350 twin.

In the same year, yamaha 250 and 350 twins left the fourstokes behind. Richard restored and customised this stunning yamaha rz350 after he spotted a magazine. Complete coverage for your yamaha rd350 ypvs twins covering 347cc models for 1983 to 1995. It had a paralleltwin twostroke engine with identical bore and stroke of its predecessor, the yamaha rd350lc. Whilst capacity is only one part of the cooling system, this does seem a backward step when we are tuning the later bikes as it means that in some climates the ypvs was only just borderline when new. Yamaha rd 350 ypvs genuine for sale in uk view 58 ads. It was leaking petrol from the overflow pipe so i assumed that the vacuum fuel tap was leaking and the float valves were not sealing properly. Yamaha rd350 ypvs twins owners workshop manual shoemark, pete on. When i bought it a few years ago, it went year 1986. It was launched at the cologne motorcycle show as the nearest thing to a road going racer ever produced. A fourstroke motor would not win daytona until 1985. The 1980 to 1982 350 cc models were codenamed 4l0 and are affectionately known as elsie. Engine 1976 yamaha rd250ac, mick abbey race tune ported cylinders and head profile, stock mikuni 28mm carbs, stock reed blocks with fibre glass reed valves. Yamaha debuted their breakthrough ypvs power valve system that revolutionized the twostroke engine in the.

Yamaha rd350 ypvs twins 83 95 by haynes publishing, 9781850108795, available at book depository with free delivery worldwide. Tuneup procedures engine, clutch and transmission repair cooling system fuel and exhaust. This means that the mixture in the combustion chamber is nearer to the spark, and the flame spreads through it quicker. Yamaha rd 350 ypvs new members welcome area yamaha owners. This homepage intends to find out how much a rd250350 engines may perform. Email field should not be empty please enter a valid email. In the ypvs engine, the combustion chamber is narrower than the piston. Shop yamaha rd350 parts at motorcycle products ltd.

Yamaha rd350lc cylinder big bore tuningkit big bore 392ccm cylinder 392cc kit for. Keep your motorcycle in tiptop shape by performing some basic maintenance replace worn spark plugs and the clutch kit for a nobog, instant. Without a pair of really good chambers you will never get much power from you rd 350 ypvs. Replaces yamaha part numbers 9321030734 and 9321030640. This is lees harris lowboy framed yamaha 350 ypvs race bike. Frame standard yamaha rd frame and swingarm, lightened and delugged. Finally we have a design for performance race only exhausts to suit the rd350lc. Take care, that right protective measures are taken. Yamaha rd350 ypvs power valve bush oring power valve bush oring to fit the yamaha rd350 ypvs fits all years of the rd 350 ypvs rd 350ypvs 31k. Complete bike build and design a speciality, if you can dream it we can probably build it. Here you have some close pictures of the damage its engine.

Note that there is a fairing part missing, the lateral fairing covers, which have been removed to open the engine. Yamaha rd 350ypvs complete crankshaft assembly taiwan. The fact is yamaha for the record won thirteen consecutive times. Contact me via email, use the form or discuss with me on. Engine 1983 yamaha 350lc ypvs, dick sullivan race tuned cylinders and head, dick sullivan modified gearbox, wossner pistons, heavy duty gearbox bearings, billet power valves, banshee crank, straight cut primary gears, billet clutch basket, vforce reeds and reed blocks, 34mm tz race mikuni carburettors, oversize tz hicapacity radiator, samco water hoses. Yamaha rd350lc 1982 4l0 europe 214l0300e1 parts list.

The 250lc carbs will give more midrange then 350 or ypvs carbs, worth remembering if your tune is for midrange. I was extremely entertaining to own a two stroke twin, equipped only with a kick starter. Yamaha 350 ypvs for sale in uk 59 used yamaha 350 ypvs. Some manuals and parts books shows it the other way around. Huge selection of lowpriced parts for all makes and models. Building your own racing expansion chambers rdrz 350 ypvs. Turning a stock yamaha rd 250 or 350 lc into a forgotten era race bike. My name is ed erlenbach, im a private tuner specializing in yamaha rd and tz performance in southern california. Browse the amazon editors picks for the best books of 2019, featuring our favorite. Hitting the open road on your yamaha rd350 means freedom, exhilaration and an escape from the daily grind. The last models sold in brazil looking a lot like the fzr of their time.

As if the original lc wasnt enough yamaha went several stages further in 1983 with the introduction of the ypvs equipped version. Please have a good look at the pictures, and check the part number is for you. Building your own racing expansion chambers rd rz 350 ypvs why should i even bother making them. Price is for qty 1 but 4 are required in the rd350ypvs. Dec 31, 2016 jetting process of our yamaha rd 350 ypvs project. Off topic but id say yamaha india could get the sr400 and sell it here. The engine in the yamaha rd 350 ypvs is a very robust construction. Motorcycles in the seventies two stroke tearaways duration. Fully adjustable by altering the weight on the arms, can be set up for street, racing or drag racing applications. But the close 104mm spacing of yamaha s modular parallel twins left no room to give such transfers to a 350. I ended up getting a suzuki rg 250 for my first bike.