Ypvs engine tuning book

I have an excel book i use for shift schedules but only find it useful for when in lockup as when unlocked slip can vary depending on torque being produced which plays on engine rpm so it becomes a bit tricker to account for in excel. Much more important are the measures below the piston. Twostroke high performance engine design and tuning. Port timing intake, exhaust and scavenging is a very important factor that determines the characteristics of a 2stroke engine. Hey, we managed a first place trophy winners on 20th june 2019. Most ypvs models in standard trim benefits significantly from a small adjustment in the timing. 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. Learn about such topics as you can tune with confidence knowing that we have developed a safe, effective and repeatable process for you. Have a look at the following blueprint rebuild and phases. Engine management advanced tuning greg banish 9mb haynes definitive guide to car performance 32mb how to tune and modify automotive engine management systems hartmann 51mb.

The first street bikes with ypvs were the rzrd350 ypvs lc2onwards, and rzrd500 gp replica in 198384. This book is filled with pictures and drawings that i have seen on no other. This is the most comprehensive efi tuning and calibration book available and that is why it has sold in 36 countries worldwide and is used as the efi tuning text book by technical schools such as school of automotive machinists and studied by students at lincoln tech and. These are excellent resources on the basics of ecu operation and general engine tuning operation. But what about the mods that martin kieltsch suggests in his book. Yamaha debuted their breakthrough ypvs power valve system that revolutionized the twostroke engine in the. Engine 1983 yamaha 350lc ypvs, dick sullivan race tuned cylinders and head. This reduces the ignition advance required to get complete combustion, which reduces the powerrobbing part of the engine cycle just like we wanted. Note that, in some engines as found on the rz, the exhaust port is most generously radiused. Ypvs yamaha power valve system ypvs yamaha engines, yamaha power valve system. This valve is operated by means of a cable from a computerized mechanical control unit which detects the ignition frequency and determines the required turning angle of the valve. Ypvs engine rebuilder advice the rd lc crazy uk 2 stroke. Wilson performance your twostroke performance authority.

Yamaha engineers realized that by altering the height of the exhaust port they could effectively change the engine power delivery thereby having optimal power and torque across the entire rev range, so it was that the ypvs was born. This book explains how the efi system determines engine operation and how the calibrator can change the controlling parameters to optimize actual engine performance. Rd350 ypvs home tune the rd lc crazy uk 2 stroke forum. I will only be tuning engines and building cranks if it is part of the complete engine rebuild. May 19, 2017 while the original 250cc parallel twin was a retuned tzr250 with lower gearing, the truth is despite the wonders of ypvs broadening the powerband it was still a peaky engine with not a lot going on below 6000rpm. In this version sold from year 1983, the dry weight is and it is equipped with a twin, twostroke motor.

In this version sold from year 1984, the dry weight is and it is equipped with a twin, twostroke motor. I have now decided to cut down on the amount of work that i take on. While searching for some parts in my rz boxes i found that i dont have a rear ypvs caliper for this bike. Complete bike build and design a speciality, if you can dream it we can probably build it. Anyway what that means is that i am being forced to believe that i might have some sort of mental parts book for these bikes.

It is a pure tuning guide, using hp tuners tuning hardware and software. 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. American motorcyclistyamaha rd350 ypvs twinsthe cumulative book. It was the first massproduction bike to use now commonplace monoshock rear suspension and in racing it instantly became the production racer of choice. John and i worked for the same corporation and i found a 500 triple kawasaki for him at a reasonable price. Rd421 ypvs engine high flow tune destined for a lambretta though you guys would enjoy. By don lasota gm efi tuning guide for hp tuners software. Earn money by sharing your favorite books through our affiliate program. We have books for ford tuning as well as the hp tuners, gm ultimate tuning guide. Tuning engines can be a mysterious art, all engines need a precise balance of fuel, air, and timing in order to reach their true performance potential. The yamaha rd 350 lc ypvs model is a classic bike manufactured by yamaha. A standard ypvs is a64mm bore with 54mm stroke, ivetaken it to a 78mm bore. Manualforthcoming booksbmw gstwostroke performance tuningrace techs. Feb, 2004 jeff hartman is the author of how to tune and modify engine management systems, fuel injection.

In the ypvs engine, the combustion chamber is narrower than the piston. Build a powerful and reliable engine the first time without wasting money on incompatible components or modifications that dont work. Crmc ypvs engine rebuild clutch basket damaged and drive gearpiston failed damaged cylinder and bent crank rod i will be stripping the crank out and the rest. Renowned for smoothing the midrange performance and removing flat spots normally associated when tuning work is carried out. Having had my interest tweaked, i decided i would buy martins tuning book on. Installation, performance, tuning, modification, and the turbocharging performance handbook, all from motorbooks. Here where i began bog standard ypvs with allspeeds, the higher number is with stan stephans dyno the main jet size reduced. Take care, that right protective measures are taken. Operation the ypvs employs a spiral shaped valve located on the top of the cylinders exhaust port. This book provides a straight forward and easy to use guide to the beginner and seasoned mechanic engine tuner. It was launched at the cologne motorcycle show as the nearest thing to a road going racer ever produced.

Lets journey back to 1973 and read the book that was the two stroke bible of that era. The procedures used to evaluate this engine can be applied to any 2 stroke engine you wish to evaluate. I have some copy from a 2stroke tuning book, but i thing the porting and piston work is a bit radical. Yamaha rd350 engine for sale in uk view 57 bargains. The fantastic aprilia rs250 chassis mated with a high horsepower rdbanshee engine gives the ultimate stroker fix. Yamahas ypvs powervalve system added lowrev driveability as did the use of reed valve induction the race bikes used disc valves. If you mill inlets and outlets of the barrel, absolutely used eye and respiratory protection. Wilson performance wp was formed out of the frustration of many twostroke tuners unwillingness to provide answers to most basic questions about twostroke performance tuning. Our books cover most fords and gm vehicles from 19882015 and beyond. Yamaha rd350 ypvs is a motorcycle that yamaha made from 1983 to 1986. Jun 21, 2018 yamaha rd350lcypvs by phil westget other yamaha motorbike repair manuals herethe rd350lc ypvs family of watercooled racederived twostroke screamers has become a motorcycling icon of the 1980s. After three years of study and in depth discussions with those willing and most importantly capable of explaining and teaching, wp was formed.

Complete coverage for your yamaha rd350 ypvs twins covering 347cc models. Routine maintenance tune up procedures engine, clutch and. These bottles are dyno proven to improve performance. Greg banish is a mechanical engineer that works as an oem calibrator.

Dec 28, 20 most of the tuning tricks are now pretty common place and much information can be found from the interweb, so i decided to breath some more life into my powervalve. The engine produces a maximum peak output power of 58. It is my hope to provide you with the best engine and performance youre looking for. He will need bigger break disks than the tyres lol. That leaves more room for strictly tuning information. Rdrz 350 idle jets with 4 mm thread the engine was running very poorl. The engine of the aircooled rd 250 is not identical to that of the rd 350 the 350cc cylinder is higher and the studs therefore longer the cylinder head has a different volume the needle bearing in the connecting rod in the 350cc are wider the primary transmission is longer the oil pump transmission is different. Here you have some close pictures of the damage its engine. Everyday i get a call saying you usedto tune my engines in the 1980s, can.

Rd250350lc ypvs all models ypvs engine in rd250350lc chassis. Apr 07, 2012 as if the original lc wasnt enough yamaha went several stages further in 1983 with the introduction of the ypvs equipped version. Books and the internet can only tell you somuch, you have to know what you are. 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. Yamaha ypvs engine three cylinder 525cc coffee table manwoman cave. Provides advice on mgbmgb gt suspension, brakes and dyno tuning. Cylinder yamaha rd350lc ypvs 392ccm tuning, 667,00. Jan 01, 20 bryan is the premier gm tuner in the country. It is a comparatively easier to get into website with easy uploading of books.

One of the best, competition winner 2 stroke tuner, lambrettas, rd350 ypvs with 521cc kits. The book contains detailed equations, graphs, and illustrations. Even with the great success of the winning banshee engines the rz still has a huge following. The basics of navigatingconfiguring hp tuners software are skipped. He converted it into a drag bike, modified the engine completely and added mikuni carbs. Gm tuning using hp tuners advanced printed course the. Sadly, most of the magazines of the day missed out on the attention to detail in getting the engine s weight down while giving both power and flexibility. He told me loads of stuff was knackered and in the end i couldnt afford to get any tuning done. Advanced tuning takes enginetuning techniques to the next level. Burgess covers the bmcbritish leyland bseries engine except the early 3bearing crankshaft unit as fitted to the mgb and mgb gt.

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 1984 yamaha rd 350 lc ypvs and all other motorcycles made 18942021. 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. His writing style is very easy to read and the book is filled with pictures too. This means that the mixture in the combustion chamber is nearer to the spark, and the flame spreads through it quicker. The 350cc pump pumps more oil at the same speed and throttle position. So his books are written with a good foundation and lots of experience to back it up. In addition to our brand new coyote cookbooks, we have other books available for sct, hp tuners, binary editormoates and delta force tuning. The last models sold in brazil looking a lot like the fzr of their time. I dont want to tune my cylinders or the carbs, neither replace the stock exhausts. Gm ls or lt course is a prerequisite this course will teach you advanced tuning knowledge in a topical format for gm vehicles. In future i will only be rebuilding andor renovating the following complete engines, 250350 lc and 350 ypvs, rd500 and rg500. I didnt want to take it back unbuilt in case he just sent back some old crap bits he had laying aroundnow i just build them myself, quite easy to rebuild and you know what. Evans performance academy draws on the years of experience jeff evans, owner of evans tuning, has tuning gm gen iv vehicles to bring you a systematic tuning process to dial in the tune to perfection using hp tuners.

Yamaha rd350 ypvs twins a world list of books in the english language. The yamaha rd 350 lc ypvs model is a sport bike manufactured by yamaha. Quite simply the most fun one can have on the street. Original engine cover for the above model, in good condition. Yamaha rd350lc cylinder big bore tuningkit big bore 392ccm cylinder 392cc kit for. It had a paralleltwin twostroke engine with identical bore and stroke of its predecessor, the yamaha rd350lc.

Yamaha ypvs 350 matching engine cases very good condition with no damage. Keeping pace with the times, yamaha slotted this heavily revised engine into a. Whether you have basic boltons, a hot cam, or a forced induction application we will walk you through the calibration process so. When it comes to two stroke tuning there is only one name. Lambretta works lowestoft 2 stroke tuning services.

Yamaha engineers realized that by altering the height of the exhaust port they could effectively change the engine power delivery thereby having optimal power and torque across the entire rev range, so it was that the ypvs. For this product you will receive 34 reward points. Maintenance tuneup procedures engine, clutch and transmission repair. 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. Conversion 255cc to 350cc tuning yamaha rd 250 350 lc ypvs. Ypvs engine rebuilder advice the rd lc crazy uk 2 stroke forum. No need for strobes and dial guages, just slacken 3 bolts, rotate to the timing required, tighten back up and away you go.

When it comes to two stroke tuning there is only one name fast bikes. This toolkit offers some basic two stroke engine calculators in hand but also extends to some advanced as well tuning menu. The engine wp started with still dominates the majority of our business. While most are pdf files, there is a few in mobipocket e book format. Decades have passed since i hung around with john and jim. A sport engine opens the exhaust at 8590 degrees atdc and its transfers 2530 degrees later. Integrated ypvs and loads of power in a lightweight package the rz350 packed a serious punch against many of its bigger cc brothers. A trials engine may open the exhaust at 100 degrees and transfers 1520 degrees later. Only the sizes and directions of ports have changed. Adjust your ignition timing with this billet adjustable timing plate, makes adjustment easy. A worked example is provided for my old yamaha rz350 29k, 1985, which is almost identical to he yamaha rd350ypvs lcii 31k. It is a musthave for tuners and calibrators and a valuable resource for anyone who wants to make horsepower with a fuelinjected, electronically controlled engine.

It was apparently released in 1968 in italian and 1972 in english. This book explains how the efi system determines engine operation and how the calibrator can change the controlling parameters to optimize actual engine. This page will list all the parts we manufacture for this popular conversion. Note that there is a fairing part missing, the lateral fairing covers, which have been removed to open the engine. Learn about such topics as you can tune with confidence knowing that we have developed a safe, effective and repeatable process for you to follow. Substantial data collection is required to evaluate an engine, more if a simulation is to be performed. With this drivetrain, the yamaha rd 350 lc ypvs is capable of reaching a maximum top speed of 189.