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
97 DR650, 05 525EXC, 06 TW200, 89 TW200, 09 TTR125, 07 TTR90, 07 CRF50