Rd400 engine tuning bookcase

Rds only is dedicated to working on old yamaha 2 stroke. 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. With a large inventory of vintage yamaha motorcycle parts and same day shipping in the continental us, we can assure that all your yamaha rd400 motorcycle needs will be met here. Easily doing a buckten for several miles on a closed course with professional drivers duh, our friend, chris, pulled up next to me and pointed to his gas tank. Oct 31, 20 rd400 the torquey twostroke and yamaha had done a smart thing with the rd400. The april 1979 issue of motorcyclist featured a very young ken vreeke strafing a. The yamaha rd 400 model is a classic bike manufactured by yamaha.

Your rd350400 will benefit from more compression once cylinder head is milled, ridding the engine of unnecessary squish clearance. Tuning motorsteuergerate anzeigen rapid bike easy rapid bike easy. Yamahard200rd250rd350 rd400rd500barrelrebore thumbnail. Buy products such as sony cfds70blk stereo cdcassette boombox at walmart and save. I started out tuning rd race bikes, and then opened up my garage.

My name is ed erlenbach, im a private tuner specializing in yamaha rd and tz performance in southern california. These carburators are all supplied with custommade cables and jetting specifications. Focus on 2 stroke motorcycles, cafe racers, fabrication, tuning and racing. Generator fiche contains the largest amount of spare parts with fiftyeight listed items. Turning a 1970s era yamaha rd400 into a streetfighter cafe racer hybrid. Yamaha rd400 parts best genuine oem and aftermarket yamaha. Simply put, jl chambers are the best pipes available for your air cooled rd or r5. Mfrs learned about 20 years ago that a large volume airbox provides consistent source of smooth airflow that is not available to open stacks outside, in the turbulent air of the world, as the bike screams down the road at speed, through crosswinds and such. The yamaha rd400f daytona special was the last hurrah of a long line of sporty midsized 2strokes. When i was around 14 a good friend of my dads stopped by just around dinner time on evening. The highest quality seals with teflon coated crank seals kit includes. Stan stephens tuning are the uks number 1 two stroke tuning firm.

Although yamaha intended the daytona to commemorate its racing successes of the previous year, this bike ended up as a monument to the 2stoke motorcycles that defined an era. Yamaha rd400 parts best genuine oem and aftermarket. Sep 20, 2015 a full engine overhaul was required and this was off course the right opportunity to make some modifications to things like the transfer ports, timing of the ports, shape of the cylinder heads. Huge stocks, fast worldwide shipping directly from japan. Rd350 motor in a yz250 frame yamaha 2 stroke thumpertalk. Rd4 stroker comes home yamaha rd400 rebuild part 5. With these rd400 1976 usa partsfiches you have access to one thousand one hundred fifty spares. Well, i had a long 6year thread here about building and developing an rd400 race engine for ahrma f50066.

Here is a great way to dress up your yamaha rd400 and get rid of those rusted, oxidized bolts with this beautiful polished 100% stainless steel 70 piece allen bolt kit for the yamaha engine. Its a daytona special converted with rz350 suspension, zx7 rearsets, owo1 seat, and of course my engine work. The yamaha rd 400 is a noisy, polluting, unreliable motorcycle. Suzuki made the gs500 from 1989 to about 2009 with 37mm forks, monoshock suspension, 17inch wheels, and a steel box section perimeter frame. Is a banshee motor the same as an rdrz 350 motor if not what is different and what can i use from a banshee engine in rd 350 cases. In 1976 the rd350 was replaced by the increased piston displacement and stroke length of the rd400. I love the rd400 engine but i dont really like the stock chassis thus was born the gsxrd400 project. Yamaha keeping its twostroke king of the hill claim to fame until 1979 when the factory production street twostroke journey came to its end. The engine, footpegs, handlebars and fuel tank are all mounted in rubber.

I have plenty of parts which can be handy to finish your work in extremely less cost. Yamaha knew this, but their production methods were not accurate enough to reliably make this gap any smaller. Have spoken to a guy and he has one for sale but the engine number starts 1a366 i dont think this is correct. Yamaha rd400 performance cylinder heads, rhsc400 hvccycle. It was great, i used to be doing 80 in 5th and itd pull a wheelie when i opened the throttle up there is no mystery to that the guy is a fruitcake, spent too much time sniffing exhaust fumes. How to use a dial gauge to adjust the timingpoints on a vintage yamaha 2stroke see description. Above is how we do the alignment on the rd 250, rd 350, rd 400s and daytonas. The rd400 series of motorcycles were the last twostroke street bikes produced by yamaha as a final hurrah for these engines. Jl jim lomas expansion chambers yamaha r5rd3507677 rd400. For yamaha rd350 parts, yamaha rd400 parts, yamaha rz350 parts.

We have the right yamaha rd400 parts for any job from repair and maintenance to custom motorcycle build projects. Unfollow rd400 engine to stop getting updates on your ebay feed. With all the components that make up the rd400 1979 usa front fork assembly. Find yamaha rd400 in canada visit kijiji classifieds to buy, sell, or trade almost anything. Generator parts diagram contains the most products. Developed to work on stock up to stage 2 ported engines. This motorcycle also had it reigns on and off the track. Often mistaken as an rz with an rd400 engine, its not. May 08, 2012 cafe racer tv approached both lossa engineering and garage company before filming season 2 and asked the wellknown custom bike builders to collaborate on the construction of a unique cafe racer, both teams jumped at the chance with the guys at lossa providing a yamaha rd400 frame and the team at garage company provided a yamaha rd350 engine. Rds wernt know for their stellar rear suspension when new and the 40 years of sitting in upstate ny made these ones good paperweights. It was my own fault really, as i insisted on fitting dodgy racing pistons rather than the tougher standard items. But when the temperature soared and the mileage was extensive there was always a slight chance of burning a hole in the piston. The model year for the first rd400, which was sold in the u. These yamaha rd400 multispark spark plugs are made for extreme operating conditions and high output.

Yamaha rd400 engine side cover decals hvc200872 rating select rating 1 star worst 2 stars 3 stars average 4 stars 5 stars best name. Access thirtynine schematic partslist fiches for rd400 1976 usa. With stock reed cages, on fully modified engines only, dyno testing has. Dyno testing and tuning performance howto harold bettes, bill hancock on. Follow the completion of my yamaha rd400 rebuild, project rd400 racer. Mar 29, 2010 on top of that you have a reed induction engine that will affect some things too. Yamaha rd400 motorcycle parts exhaust, engine, cooling, brake. Items such as the frame fuel tank and the steel seat base will no doubt require repairs. If matching numbers dont interest you, youll still achieve beautiful restored bike for far less money. The engine goes better with a squish gap less than 1. It evolved directly from the yamaha rd350 the 350 evolved into the rd400c in 1976, the d and e in 7879 and the final model, the white 1979 rd400f. This page contains thirtynine unique part list schematics.

Oct 16, 2010 i know that this has probally been covered about a dozen times, but i cannot find anything on this topic. Dyno testing and tuning is the first book to explain the proper testing procedures that everyone should use to get accurate and useful results from either an engine or chassis dyno. It is safe to retard the ignition timing because it generally makes the engine run cooler and you just loose power if you overdo it. Dec 14, 2016 a quick 2nd gear burnout on the dt rd400. Yamaha rd400 1977 usa online schematics your first port of call when repairing or restoring. In about the first tenthmile, the rd400e serves notice. Rd400 workshop walktrough and first run sacha drenth. The oily pipes gang motorcycle club is a brotherhood of vintage 2 stroke motorcycle enthusiasts established in 2004.

Kit contains all necessary seals for one engine rebuild. To start viewing messages, select the forum that you want to visit from the selection below. The stock rds lack any type of proper head to cylinder alignment which is very sloppy and does not allow a precise alignment of the combustion chamber to the center of the bore. The engine starts and runs fine, but the bike does not come smoothly on to the pipe.

New and used items, cars, real estate, jobs, services, vacation rentals and more virtually anywhere in canada. The blue streak the rd superbike project was my second monoshock conversion. Any time a modification is made to the motor, such as install a different exhaust system, or air filter, you will need to rejet. This time its the rear bolt, near the shift lever on the left side and the kick starter on the right side. A suzuki ram airstyle single cylinder head also helped by reducing noise. Not only will the bottom end power be improved, but the peak power goes up also. Yamaha rd400 lectron powerjet carbs 36mm high velocity. Rd350banshee engine banshee repairs and mods banshee hq.

Rd400,rd500, rz350,rz500 yamaha tuner yamaha 2 strokes 1973 to 1985 yamaha 2 strokes. This is flat bar cage bearing as used on tz cranks, these have 18 rollers instead of the 14 on the standard. Kit includes everything you need to transform your stock rd into a serious performance machine. Say, don, doesnt one of your boys like working on motorcycles. Click on the links below for further information on what spec ii can offer for your motorcycles engine. The definitive manual on tuning for performance or economy. The definitive manual on tuning for performance or economy vizard, david on. Weighing in at 160 kilos, the 398cc rd400 became the ultimate racingderived, twostroke street racer. Rd400 dt400 smokey 2nd gear burnout yamaha tim kunsa youtube. The subsequent increase in medium effective pressure within the engine cylinder also contributes to extra engine performance and optimum motorcycle fuel efficiency. Members bikes range from daily riders, clean low mileage originals, stock restorations, to full blown customs.

The engine produces a maximum peak output power of 43. In this version sold from year 1978, the dry weight is and it is equiped with a twin, twostroke motor. Im told the engine still kicks through and is not locked up. The 1978 yamaha rd 400 and all other motorcycles made 18942020.

Sep 16, 2015 well, i had a long 6year thread here about building and developing an rd400 race engine for ahrma f50066. Yamaha rd400 selector shaft plug seal fits all rd 400 engines. The rd400 has one of those simple looking engines that cry out for serious tuning attention. Yamaha rd400 big end bearing tz style tz style replacment big end bearing to fit the yamaha rd400 all models. So from the beginning of building this bike i knew i wanted a bike that handled like a brand new sport bike. These are often required if you are removing the transmission as you need to remove the selector shafts and the old ones can get damaged. With the above information, and the fact that rd400 pistons tend to come apart if rpm. Do you happen to have the part numbers for the outer and inner crank bearings.

I know that 2strokes are frowned upon in the modern age of melting ice caps, vanishing glaciers, supersized hurricanes and acid rain but if we put all of that aside for a moment, we all know that 2strokes represent a high water mark on the amount of fun its possible to have on two wheels. Yamaha rd400 twins repair manual 19751979 the motor bookstore. Rd400 product library product library yamaha motor co. Yamaha rd400 engine side cover decals hvc200872 hvccycle. Running modified fmf banshee pipes on a 76 rd400 engine in a 75 dt frame. The rd400 was pretty much a solid bike, but suffers from corrosion in most areas unseen. Find oem yamaha motorcycle parts, everything from engine and transmission to suspension and body parts. The 1976 yamaha rd 400 c and all other motorcycles made 18942020. Yamaha rd400 1979 usa front fork buy original front fork. Mar 30, 2010 rd400 experts tell me what you see please. If this is your first visit, be sure to check out the faq by clicking the link above. Yamaha rd 400 technical specifications ultimate specs.

A blog about building a 1970s era yamaha rd400 racer cafe racer. The chassis handles great but they came with a fourstroke 500cc twin. Aircooled rd manuals and parts lists click the link to open the file in your current browser or rightclick and select save as to download. Rather than complicate the engine with auxiliary balancers which they have used on several engines, yamaha has built a smooth motorcycle by isolating the engine s vibrations from the rider. Yamaha rd350 rd400 stage 1 performance kit with unifilter. The bolt, stud 278 is the most frequently specified with two applications. Not the sort like when you take your rd400 to be motd and the mechanic says to you i used to have 250 when they first came out.

Well, that didnt take long kate, a friend, and i were headed downtown to a concert. The 1975 kawasaki h2c has broken one of the long motor mount bolts that go beneath the engine. The engine was vapourblasted and powdercoated before receiving a rebore, porting and jetting by martin at taymar racing who shares the building with spirit. The rd350 was already a cute, lightweight, sweethandling bike sharing the same engine internals as the tz350 except for the aircooled barrels with smaller ports less performance, but decent reliability for hardworked pistons and rings notoriously shortlived on twostrokes. 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. Roland has always wanted to jam a 2 stroke street motor into one of his race bikes.

Ask a question about yamaha rd400 twin repair workshop. From the past to the present, the various genres of products by yamaha is now in the library for you to enjoy. Martin is a specialist in yamaha 2stroke restorations ever since racing and tuning lc350s at nearby brands hatch way back when. Yamaha rd200 rd250 rd350 rd400 rd500 barrel rebore ebay. Rd400 build for a friend rats nest south bay riders. Our specialist engine tuners will be able to help you with every aspect of your tuning and servicing. Rd400 dt400 smokey 2nd gear burnout yamaha tim kunsa timkunsa. Rd400 experts tell me what you see please pnw riders the. Its the way the twostroke engine delivers its power that separates the rd400 from all the fourstroke twins. Yamahas sizzling rd400 daytona special was almost the final chapter in roadgoing twostrokes. Frame up rebuild or just minor tuning to get your rd on road by coming summer.