If you've ever attended a Motocross race and heard the throaty growl of powerful four-stroke dirt bikes as the riders navigate the twists, turns, and jumps, it's hard to fathom a world where that ...
The system made it into very limited production in 2004, aboard 250 WR450 2-Trac dirt bikes – at the time, our publisher Mike Hanlon proclaimed it "one of the most significant moves in motorcycle ...
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