2012 YAMAHA TT-R110E TTR110E, Pure Off-Road Fun Torquey 110cc air-cooled 4-stroke engine, 4-speed gearbox with automatic clutch and effortless electric starter. The only drawback? Only one family member can ride at a time. Better get a few. Key Features Convenient electric starter for effortless starting. Big fun for the whole family, the YZ-styled, four-stroke-powered TT-R110 begs to be ridden by everyone from bigger kids to adults. A seat height of only 26.4 inches makes this one accessible to most riders, but 7.1 inches of ground clearance and great suspension at both ends mean it can go places. Four-speed auto-clutch transmission has an easily accessible gear for nearly any terrain.