Yamaha rd 350 ypvs engine tuning book

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. Tuning of an rd 250 350 twostroke engine 7386 tuning. 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. Email field should not be empty please enter a valid email. Complete coverage for your yamaha rd350 ypvs twins covering 347cc models for 1983 to 1995. Here you have some close pictures of the damage its engine. Yamaha 350 ypvs for sale in uk 59 used yamaha 350 ypvs.

Pommie rejets his rd350lc and teaches us plug chops, timing and jetting plus fits dna filters. This model was not officially sold in the us but was available in neighbouring canada. A version of the engine without ypvs was used in yamahas banshee atv. Five star customer service and parts delivered fast. Click the images for more technical information relating to your rd yamaha. All engine development is done exclusively with tsr twostroke. It was launched at the cologne motorcycle show as the nearest thing to a road going racer ever produced. This reduces the ignition advance required to get complete combustion, which reduces the powerrobbing part of the engine cycle just like we wanted. 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. I thought id change the float needle valves and seats in both carbs and try to fix the vacuum tap, which. I can still smell the exhaust fumes thirty years after i sold it. Only needed on high horsepower engines a lock up clutch will prevent clutch slip at high horsepower. Yamaha rd 250 350 ypvs job lot dont need anymore so selling for just 101.

Browse the amazon editors picks for the best books of 2019, featuring our favorite. 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. Yamaha rd350lc 1982 4l0 europe 214l0300e1 parts lists and. I only wish that yamaha had solved the plug fouling problem by equipping the rd 350 with a stronger ignition systemcoils. Its a great bike and like the rd350, it can still evoke the classic yamaha cult feeling that the rd had.

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. I sold my rd 350 in order to purchase a new harley davidson fxe 1200. This software packages may also be available on the internet as the first book is quite old. The chambers is the single most important thing when it comes to tuning the 2stroke engine. Yamaha rd350 ypvs is a motorcycle that yamaha made from 1983 to 1986. The 250lc carbs will give more midrange then 350 or ypvs carbs, worth remembering if your tune is for midrange.

When i bought it a few years ago, it went year 1986. Tuneup procedures engine, clutch and transmission repair cooling system fuel and exhaust. Sep 23, 2010 yamaha rd 350 ypvs and yamaha rd 500 v4 together duration. In the same year, yamaha 250 and 350 twins left the fourstokes behind. Motorcycles in the seventies two stroke tearaways duration. Building your own racing expansion chambers rdrz 350 ypvs. Fully adjustable by altering the weight on the arms, can be set up for street, racing or drag racing applications.

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. Yamaha debuted their breakthrough ypvs power valve system that revolutionized the twostroke engine in the rd350 ypvs of 1983. Available to special order, a billet lock up clutch assembly, and outer casing for the yamaha ypvs 350. Quite simply the most fun one can have on the street. Yamaha rd 350 ypvs angelfire the yamaha rd 350 powervalve. 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.

A total of 43 parts lists are found for the rd350lc 1982 4l0 europe 214l0300e1. Yamaha rd350 ypvs bottom end engine parts, rd350 ypvs. 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. 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. Dec 31, 2016 jetting process of our yamaha rd 350 ypvs project. 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. The fact is yamaha for the record won thirteen consecutive times. Much more important are the measures below the piston. 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. Off topic but id say yamaha india could get the sr400 and sell it here. With the engine back together i wanted to make sure the timing was correct, on the rd it. Rd350lc 1982 4l0 europe 214l0300e1 section with fortythree other schematic pages. It had a paralleltwin twostroke engine with identical bore and stroke of its predecessor, the yamaha rd350lc. With ratios optimized for racing, this gearbox will make for a large improvement in acceleration and top speed on the track.

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. The tz dry clutch and gearbox fits in with little trouble. The largest parts list footrest contains fiftyfour products for this rd350lc 1982 4l0 europe 214l0300e1. Yamaha rd350 ypvs twins 83 95 by haynes publishing, 9781850108795, available at book depository with free delivery worldwide.

Yamaha rz350, rd350lc motorcycle history, classics. Yamaha rd350 ypvs engine parts top end yamaha rd350ypvs engine parts bottom end. Front brakes ap lockheed race caliper with tz disk and stock yamaha cylinder. 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. 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. As if the original lc wasnt enough yamaha went several stages further in 1983 with the introduction of the ypvs equipped version. Complete bike build and design a speciality, if you can dream it we can probably build it. A worked example is provided for my old yamaha rz350 29k, 1985, which is almost identical to he yamaha rd350ypvs lcii 31k. Some manuals and parts books shows it the other way around. 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. 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. Pommies yamaha rd350lc by tony wilding 2 years ago retro 80s to 2000s, custom, tech tips. Yamaha rd 350 ypvs new members welcome area yamaha owners.

Yamahas rz350 has a real place in the history books, heres what to look out for. 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. Hydroformed gibson stainless pipes with alloy toomey silencers. Yamaha rd350lc cylinder big bore tuningkit big bore 392ccm cylinder 392cc kit for.

Genuine yamaha rd250lc rd350lc rd350ypvs reflector 44985102. Richard restored and customised this stunning yamaha rz350 after he spotted a magazine. Yamaha rd 350 ypvs genuine for sale in uk view 58 ads. In the ypvs engine, the combustion chamber is narrower than the piston. Without a pair of really good chambers you will never get much power from you rd 350 ypvs. Turning a stock yamaha rd 250 or 350 lc into a forgotten era race bike. Building your own racing expansion chambers rd rz 350 ypvs why should i even bother making them. 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. It had a paralleltwin twostroke engine with identical bore and stroke of its. The last models sold in brazil looking a lot like the fzr of their time. Its a fantastic looking bit of kit and has the performance to match as its a proven race winning bike in recent years. Yamaha rd 350 lc ypvs 83 84 sbs front ceramic brake pads oe quality 550hf.

Gallery, model history, stories, specifications, guest book, links and art work. I was extremely entertaining to own a two stroke twin, equipped only with a kick starter. Yamaha rd350 ypvs twins owners workshop manual shoemark, pete on. This is lees harris lowboy framed yamaha 350 ypvs race bike. 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 1980 to 1982 350 cc models were codenamed 4l0 and are affectionately known as elsie. Hitting the open road on your yamaha rd350 means freedom, exhilaration and an escape from the daily grind. This homepage intends to find out how much a rd250350 engines may perform. 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. Integrated ypvs and loads of power in a lightweight package the rz350 packed a serious punch against many of its bigger cc brothers.

This site is dedicated to the twostroke twin cylinder 350 ypvs. 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. 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. A fourstroke motor would not win daytona until 1985. The engine in the yamaha rd 350 ypvs is a very robust construction. Huge selection of lowpriced parts for all makes and models. 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. The standard gearbox is fine with 3 tz 750 clutch springs thats all i do. Replaces yamaha part numbers 9321030734 and 9321030640. Yamaha power reed kit rd350 ypvs motorcycleatv boyesen 732. Do not start to widen the intake and exhaust port at first. Contact me via email, use the form or discuss with me on. Yamaha debuted their breakthrough ypvs power valve system.

The procedures used to evaluate this engine can be applied to any 2 stroke engine you wish to evaluate. Keep your motorcycle in tiptop shape by performing some basic maintenance replace worn spark plugs and the clutch kit for a nobog, instant. Shop yamaha rd350 parts at motorcycle products ltd. Finally we have a design for performance race only exhausts to suit the rd350lc. Yamaha debuted their breakthrough ypvs power valve system that revolutionized the twostroke engine in the. My name is ed erlenbach, im a private tuner specializing in yamaha rd and tz performance in southern california. But the close 104mm spacing of yamaha s modular parallel twins left no room to give such transfers to a 350. Frame standard yamaha rd frame and swingarm, lightened and delugged. If you mill inlets and outlets of the barrel, absolutely used eye and respiratory protection. This means that the mixture in the combustion chamber is nearer to the spark, and the flame spreads through it quicker.

The water jacket maintained a constant temperature and allowed the engine to be in a higher state of tune without loss of reliability. Yamaha rd 350ypvs complete crankshaft assembly taiwan. Note that there is a fairing part missing, the lateral fairing covers, which have been removed to open the engine. The yamaha rd s were so popular back in the 80s and as the article states were a sensational bike to ride. 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. Take care, that right protective measures are taken. I ended up getting a suzuki rg 250 for my first bike. 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. Price is for qty 1 but 4 are required in the rd350ypvs. Yamaha rd350lc 1982 4l0 europe 214l0300e1 parts list.