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Message: [QUOTE="NCFRC, post: 1350789, member: 79003"] I had some time this afternoon and pulled the cover off where the Kips shaft gear contacts the exhaust port shaft . Yes , I removed the exhaust to make it easier. What I found was the shaft tension wasn't holding the exhaust port completely closed. I gently twisted the shaft with a pair of pliers and it had good spring tension so I assume the lower part of the shaft is connected properly. I moved the shaft half moon gear one tooth ahead on the port shaft and it now holds the exhaust port nice and tightly closed. I had the top end off this winter and I thought it was tight but maybe I didn't check it close enough. The other strange think is I don't think it had this bad a low end when we first got it out. After reassembling , the bottom is back and the power is much smoother , no abrupt hit , which made it terrible for trail riding. Is there any way the shaft can be slipping on the bottom ? [/QUOTE]