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1424 Views 4 Replies 2 Participants Last post by  roadterrorist_2
Im was just wondering if someone could explain what a powervalve is,
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thanks for that, i just got my bro's 99 rm 250 a few months ago, and ive grown up on old aircooled two strokes so i need a bit of help with these newfangled watercooled machines,

to right about four strokes,i just dont see the point in motocross, althoug trailbikes like xr's and dr's arent to bad since they pull from like 900 rpm.But 2 strokes are catching up pretty quick
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