my dad owns the above mentioned sled. Took it out for the first ride of the season this past weekend and it seemed to shift up and down in RPM's while keeping the throttle at a constant clip while riding down the trail. Felt as though the sled was "switching gears" constantly. I figure it might be a clutch issue or belt, but thought I would see if anybody else had a simlar problem and/or suggestions? BTW, how the heck do you take a belt off an AC sled? I'm a doo man myself and they make a real simple tool to open the sleeves of the secondary, saw no such thing on the AC and without an owners manual to reference??? Thanks in advance for your help.