Yamaha's off-road family continues to produce more offspring. In 1999, Yamaha introduced the all-new electric-start four-stroke TT-R225 and TT-R250. For 2000, Yamaha introduces three all-new motorcycles, the TT-R90, TT-R125 and TT-R125L.

The 2000 line of Yamaha off-road bikes, eight models total, has machines not only for the adults, but beginners and kids' bikes, as well.

The all-new TT-R125 and TT-R125L four-strokes are the bigger brothers to the TT-R90. Powered by an all-new air-cooled 4-stroke engine, the TT-R125 and the large wheel TT-R125L complement Yamaha's existing RT100 2-stroke and offer beginner/smaller riders the chance to ride a YZ-styled machine.

This new four-stroke is offered in two models: the TT-R125 which is fitted with a 17 inch front wheel and 14 inch rear wheel, and the physically larger TT-R125L (large wheel), which runs with a 19 inch front wheel and 16 inch rear wheel.