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thechrisfox Started a new thread Rm250 won't rev right

7/20/2015 6:02pm
I have a 2000 rm250. And the timing is spot on and the jetting is correct for my pipe and altitude. Motor is 100% fresh and done correct. But for some reason when it runs it won't rev up past like 1/2 to 3/4 throttle it just spits and sputters and back fires. My thought is that where the power...
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