Model(s) covered: 2005 Honda CRF 450 R, 2005 Suzuki RM-Z450, 2005 Yamaha YZ 450 F
Over the past few years motocross technology has come on like gangbusters. Of course, Yamaha sparked the competition-based thumper revolution in 1998 when Doug Henry legitimized the four-stroke by winning the Outdoor Nationals aboard a YZ400F.
Over the next few years, Yamaha would go on to develop the YZ426F and then YZ450F with little competition from the other Japanese manufacturers.
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