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Message: [QUOTE="scottiedawg66, post: 1415434, member: 72637"] I am tuning my yz 250 that I am racing at pikes peak this year at the supermoto track. In the sweeping corners when I need 20% throttle the power delivery is not smooth, and makes it really hard to hold a consistent line and or not spin the tire, (full slicks). i am betting its a jetting issue, but I would not be surprised if it was a throttle position sensor or power valve issue. the bike goes like hell at WFO and is smooth. Its just at partial throttle that I have a problem. what yall got? [/QUOTE]