I figured it was close, but not the right one...the dry clutch cover is different and the engine you posted looks a bit newer.
Man! Love that Jawa, but it's a V4. 34 has slipped a Square 4 in on us this time. A 350 at that! That's an oddball. Want to say it's Yamaha from back in the OW54/OW60 days, but don't think it is because I've never heard of a 350cc version. Are these in your collection?
LOL....Shit head! Yes an RTM. One of only 2 ever made I understand and very fast in it's day. I'll go look for more pictures. Don
Hahaha...I've been paying attention to what you guys are doing over there on NATS. I'm not the smartest guy in the world but I have a decent memory. Thanks Don Pete
That would be the air cooled TZ250 that some very creative people added a third cylinder and beat the factory for a world championship ?