hello! new to forum.I have 2002 AC model 375.When engine is cold it takes off smoothly,but after about 30 minutes of driving quad it starts off with a jerk. I checked the belt and drive and secondary clutch....everything looks good...about 1500 miles on machine.I know there is a shoe clutch in behind the belt clutch.....could it be worn already?Did anyone have this experience? thanksfor any info.: