Originally Posted by Tosh Togo
Because things were changing at that time. I never said that the Yamaha model lettering system was cast in stone. Rules get bent, changed, or forgotten sometimes. In this case it may have been a marketing adjustment.
Even though I was there, I don't remember the 70's all that well, so don't press me for all the details.
Medium-bore Yamahas were TD250's, TR350's, DT350's and RT360's until the watercooled engines arrived here in ~1974, and then they all became TZ's or DT's. There was even a DT400 for a while.
Ask an old dirt rider what a DT-1 is.
Cut my teeth on a DT-1. Great engine, handled like shit.