Well I think I answered my own question, so posting up what I believe is the answer. The TTR 110 appears to be the biggest Yamaha without a clutch. Next step up is the 125, with real clutch and 5 speed. But in the 110 you can get electric start & a 4-speed tranny.
the last of the mini bikes, they're real motorcycles after this one.
82 fj40, 99 uzj100, 06 gx470
05 525EXC, 01 XT225, 09 TTR125, 07 TTR90, 07 CRF50