My buddy's uncle has an rd350 with Tz motor in it (technically tz barrels on the rd350 bottom end). He used to race with dick mann in the 70's and 80's and built his street bike out of leftover racing spares. It is bar none a stupid fast motorcycle. When he was moving he offered me the bike at $7000 and I told him it was way too much for any kind of bike like that at the time, thinking about it now however....hmmm, I wonder if it wasn't worth that with all the period race goodies on it.