Pommies yamaha rd350lc by tony wilding 2 years ago retro 80s to 2000s, custom, tech tips. Motor engine, motorcycle engine, cool motorcycles, vintage motorcycles, yamaha 250, suzuki cafe racer, race engines. In future i will only be rebuilding andor renovating the following complete engines, 250350 lc and 350 ypvs, rd500 and rg500. 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. Top end gasket kit to fit the yamaha rd350 air cooled engine, in this yamaha rd 350 head gasket kit you will find the gaskets you require to strip and rebuild the top end of your engine. Economy cycle 5815 acton circle suite 102 granbury, tx 76049 covid 19 corona virus update economy cycle is open for website orders and we are shipping daily please use this address for correspondence and returns we specialize in parts, service and restoration for the yamaha rd350, rd400 and. Take care, that right protective measures are taken. These bottles are dyno proven to improve performance. The expansion chamber design software is used to design the tuned pipe for the exhaust system of the micro car engine. Fully adjustable by altering the weight on the arms, can be.
I would however like to tune the engine a bit in the future when ive got a bit more money to spare. Unfortunately one of the piston blowed, and i decided to rebuild and see where i can find some performance inprovements. My name is ed erlenbach, im a private tuner specializing in yamaha rd and tz performance in southern california. The bike is in near perfect condition for a machine that is 36 years old and all paperwork is in order. Engine management tuning walkthrough full video youtube. If the carb is jetted too lean the combustion temperature could get too hot resulting in either a seized piston, or a hole melted right through the top. Tz cages required either welding an adapter plate to the cyl or redrilling the mounting holes. Quite simply the most fun one can have on the street. If you are after a forged piston for your yamaha rd 350 then look no further than wossner. Tuning of an rd 250 350 twostroke engine 7386 tuning. Great savings free delivery collection on many items. Hi, i have the r model like a f2 but with twin headlamp fairing. To improve performance further, the new yamaha rd 350 ypvs was fitted with lighter frame, new exhaust, monocross rear suspension, triple disc brake at front and single disc brake at.
Building your own racing expansion chambers rdrz 350 ypvs. Now i have much experience with this engine and know it inside out including the electronics etc, but i have. Much more important are the measures below the piston. The last models sold in brazil looking a lot like the fzr of their time. Rds rgs rgvs tztzr saec,ypvs,modifications bdk race. Available to special order, a billet lock up clutch assembly, and outer casing for the yamaha ypvs 350. Yamaha rd 350 piston kits, gaskets small end bearings. I have now decided to cut down on the amount of work that i take on.
Enter your email address to receive alerts when we have new listings available for yamaha rd350 engine for sale. High quality, extremely durable yamaha rd350 ypvs 29l air box. Sad but true, the rd 350 is no longer available for sale, however there are plenty of secondhand bikes around in real good condition waiting to be picked up. With the pot set fully clockwise the timing will be static as per graph. The engine in the yamaha rd 350 ypvs is a very robust construction. The tz dry clutch and gearbox fits in with little trouble.
Cheetah cub serval athena big bore kits in various sizes for your ypvs banshee. Tuning of an rd 250 350 two stroke engine 73 86 engine tuning kit yamaha rd 350 358cc yamaha rd 350 tuning foto best contest. The engine was still a paralleltwin twostroke with liquid cooling but improved with revolutionary ypvs yamaha power valve system. Yamaha rd350 ypvs top end gasket kit athena top end gasket kit for the yamaha rd350 ypvs. The 347cc parallel twin yamaha rd350 ypvs engine was. The standard gearbox is fine with 3 tz 750 clutch springs thats all i do. 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. Rd250350lc ypvs all models ypvs engine in rd250350lc chassis. 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. The 347cc parallel twin yamaha rd350 ypvs engine was a further development of the rd350 and the rd350lc. Yamaha rd350, rd350 history rd350 yamaha rd350 parts service manual workshop manual motorcycle software expasion chamber 2 stroke tuning electronic ignition performance parts. View our entire inventory of new or used yamaha motorcycles.
Tel your tuner what pipes you are using so he can match the tune to the pipes. As you can see from the following pictures, i had to strip paint off some parts before i could vapour blast them but you can see the results. Modification of the exhaust whistle very often i thought about, why the stock exhaust system brings peak power only through such a narrow range of 1,500 rpm. Yamaha motocrossers have used a mechanically controlled version of the ypvs, while the roadracers have used an electronically controlled version similar to the rzs system. I havent ever considered putting a different engine in the tdr, ive also seen the beginnings of someone putting an rg500 engine in a tdr. Aircooled, and will not be able to monitor its performance. Specializing in hardtofind vintage japanese 2stroke street bike parts for yamaha, kawasaki, suzuki, bridgestone, ural motorcycle sales, zero motorcycle sales, sherco trials bikes, scorpa trials bikes. Complete coverage for your yamaha rd350 ypvs twins covering 347cc models for 1983 to 1995. I had a lot of fun and games with setting up the initial ignition timing. It read ypvs, which actually stood for something yamaha power valve. Transfers and exhaust take some skill but heres some intake work that most guys can do on their own and feel pretty good about what theyve done. Find amazing local prices on yamaha ypvs for sale shop hasslefree with gumtree.
The ignition timing is not adjustable on the stock bike, so there is a page in this tuning guide which tells you how to modify the bike so that you can adjust the timing. Without a pair of really good chambers you will never get much power from you rd 350 ypvs. In the ypvs engine, the combustion chamber is narrower than the piston. This was for two reasons, one that i had the lc stator in the ypvs engine, and two, because i was using a zeeltronic and so needed to set it so that i had as much advance as possible in the system in case i wanted to use it. Pommie rejets his rd350lc and teaches us plug chops, timing and jetting plus fits dna filters. I will only be tuning engines and building cranks if it is part of the complete engine rebuild. Complete bike build and design a speciality, if you can dream it we can probably build it. The rzrd is a reed valve engine, i had two of them in the early 90s. 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. Dec 15, 2016 once this was done a yamaha ypvs engine was sourced and rebuilt up, before being installed into its new frame, with a bespoke exhaust system, a new radiator, and new keihin carburettors.
Building your own racing expansion chambers rdrz 350 ypvs why should i even bother making them. Yamaha rz350, rd350 ypvs piston kit, tkrj hvccycle. Yamaha saw fit to give the early ypvs a horribly under sprung, poorly damped. A full close ratio gearset for the rd350 and rz350 with racing undercut dogs for fast, accurate gear changes and positive retention. Yamaha rd350 ypvs exhaust gasket to fit the rd 350 ypvs all years and models f1 f2 rz350 etc. Correct carburetor jetting is important for proper combustion. The ypvs powervalve system actually reduces the onoff feeling you get with the plain lcs hence a bit of debate over which is better to make it more rideable through the midrange. A worked example is provided for my old yamaha rz350 29k, 1985, which is almost identical to he yamaha rd350ypvs lcii 31k. This kit is made in italy by athena and is a better quality one than the budget one we sell which is made in taiwan. The 250lc carbs will give more midrange then 350 or ypvs carbs, worth remembering if your tune is for midrange.
Finally, i opened a 74 exhaust pipe and one of the ypvs and saw the reason. Jul 22, 2005 ive tried searching for threads on here about banshee owners running the rdrz350 ypvs engine, but the search doesnt come up with much. Cdi ecu yamaha rz250 rd350 rz350 rd350lc rz350r ypvs blackbox. Only needed on high horsepower engines a lock up clutch will prevent clutch slip at high horsepower.
This is the inner crush type gasket that fits over the exhaust pipe and into the cylinder on the rd 350ypvs. The chambers is the single most important thing when it comes to tuning the 2stroke engine. Integrated ypvs and loads of power in a lightweight package the rz350 packed a serious punch against many of its bigger cc brothers. Honda ns400r engine parts, tuning our products sort by date newest to oldest oldest to newest sort by price highest to lowest lowest to highest sort by name a to z z to a. Certainly, few machines can have brought so much fast and furious enjoyment to so many people. Performance fabrications is dedicated to manufacturing the finest bespoke hand crafted exhaust systems available.
The engine stays in place, you just take the head off. Yamaha rd 350 engine dismantling rockfort motor works duration. 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 engine parts top end yamaha rd350ypvs engine parts bottom end. Price dependant on condition and lack of home tuners attention. The procedures used to evaluate this engine can be applied to any 2 stroke engine you wish to. This reduces the ignition advance required to get complete combustion, which reduces the powerrobbing part of the engine cycle just like we wanted. For tuning the domes in the athena head are removable, and replaceable if needs be. Tz cages were used because at the time rz cages werent around yet. Yamaha rd350 wossner piston kit wossner piston kit for the yamaha rd350 also fits the rd350lc rd350 ypvs rd400. This software packages may also be available on the internet as the first book is quite old. Renowned for smoothing the midrange performance and removing flat spots normally associated when tuning work is carried out. The procedures used to evaluate this engine can be applied to any 2 stroke engine you wish to evaluate. See 2 results for yamaha rd350 engine for sale at the best prices, with the cheapest ad starting from.
Wp has tuned several of these little monsters to incredible levels. Rdrz350 ypvs engine in my banshee banshee repairs and mods. Delivery from cheltenham for uk customers takes about 3 to 5 business days. This paralleltwin 2 stroke engine from an 80s yamaha rd350 ypvs, claimed to be the nearest thing to a road going racer ever produced by mcn in 1982, was brought in to me recently for restoration. Hi there i purchased this bike 2 years ago in boxes. Otherwise you could get a top end screamer that doesnt work below 10,000 rpm grate fun ok for the track but useless. Yamaha rd 350 ypvs umbau tuning yamaha rd 350 lc ypvs part 03 prc 2 tempos greasy greg yamaha rd350 squishband tuning optimization risultati immagini per yamaha rd 350 street special racing. The most well known of which is the kit made by the andreani group who are the italian dealer for ohlins and suspension partner for sbk championship, so have the right pedigree with this stuff. 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. If you mill inlets and outlets of the barrel, absolutely used eye and respiratory protection.
Whether its an cylinder reboring, engine tuning, a crank. They worked with the tuning works in the uk to improve the kit, and ttw has sold a lot of these kits to the rgv boys. Ive had my shee for 18 months and it already had the ypvs engine fitted. Models such as the yr5, rd350 and rd400 had kept the tuningfork logo to the. I offer my 1983 yamaha rd350 lc with ypvs engine for sale. 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. Buy parts for yamaha rd350 ypvs and get the best deals at the lowest prices on ebay. All engine development is done exclusively with tsr twostroke racing engine design software and. Dec 29, 2016 this feature is not available right now. As if the original lc wasnt enough yamaha went several stages further in 1983 with the introduction of the ypvs equipped version. Bit more power as standard and one hell of a lot more tuning potential. This means that the mixture in the combustion chamber is nearer to the spark, and the flame spreads through it quicker. Add to favourite seller ask seller a question about us contact us view feedback visit our store add my shop to your favourites and receive my email newsletters about new items and special promotions.
Yamaha rd350 ypvs f1 f2 fairing headlight top scre. Uk motorbike web directory and search engine, one of the fastest growing motorctcle websites in the uk. With ratios optimized for racing, this gearbox will make for a large improvement in acceleration and top speed on the track. 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. I recently had the carbs done and they are nicely synchronized, although temperamental, for those. Variableheight exhaust port or not, theres a peculiar flat spot in the rzs powerband. Engine 1983 yamaha 350lc ypvs, dick sullivan race tuned cylinders and head. The ypvs power valve on the rz rd in europe was a cylindrical valve, with a cutout, fitted horizontally in the exhaust port that rotated to change the height of the exhaust port giving the motor a wider powerband. Once this was done a yamaha ypvs engine was sourced and rebuilt up, before being installed into its new frame, with a bespoke exhaust system, a new radiator, and new keihin carburettors. Since theres plenty of guys out there that would like to try their hand at porting their rz350s. Accelerate from a low engine speed, anything below 4000 rpm, for example, and when. Its forks were slightly soft, particularly when the powerful front brake was used.
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