Hey I have a 2002 yz426f. Bought it a few days back. I was riding on some trails and took a short cut on a road back to the truck and trailer. When I got up into 5th and rolled on up to about 3/4 throttle, the bike started to skip. As if the chain had a bad kink or somthing like that. My buddy said just put a new clutch in it but I didn't wanna spend 60+ and that not be the problem. Thanks for any input.