I have a 2000 YZ426 that I picked up last year for $1600. I have noticed when trying to start out in 1st gear, the clutch enguages with a jerking feeling like it is grabbing, not slipping in gear. I don't think this bike has ever had the motor tore into. Time for a new clutch kit? Any suggestions as to what brand/type? My brother and I mainly trail ride with the exception of the track a few times a year.