german version

Tuning of a '73 RD 250 / 350 two-stroke engine

Hello fans of the air-cooled Yamaha RD 250/350. This homepage is about, to find out how much air-cooled RD250/350 engines may perform.
Any measures presented in capture 250cc and 350cc has been tested. 350cc was the first chapture. Start reading this chapture. The website is still growing as I continue in my activities. I reflect everything as exactly as possible. But be aware that on this home page we try to touch technical limits of the RD engine. When reconstructing the tips you can easily go too far and ruined the engine, for which I am not responsible, of course.

I run this site to find a few like-minded people. I do not sell anything and have no business interests with this website. Talk to me via email, use the form or discuss to me on www.rd350lc.de . I look forward to suggestions and will reply.

Please take into account that the so modified engine is thought for classic racing on the racetracks. Each bears the responsibility for themselves, in which chassis he inserts the resulting racing engine with 50 PS. However, should anyone come up with the idea to make one of the described modifications to a vehicle that is to be moved on public roads, so proof, if you need a technical acceptance of the modification by an authorized authority.