Chances are chain skip is the problem. it doesn't take much wear on the axle sprocket to give skip. The belt or clutch in the cvt won't slip and grab, they just slip continualy until the load is removed. if the axle sprocket teeth seem pointed at all it's worn. If the buggy is a few years old then metal fatigue in the swing arm motor mounts, particularly in the rear mount can cause flex which gives enough slack to skip in a high load situation. The cheap factory chains will stretch. Though not visualy apparent, may seem fine but sections of the links stretch enough so the rollors won't seat into the sprockets correctly. Check for frame flex by placing the buggy up against a post or the side of a building then blimp the throttle enough to engage the clutch if you got swing arm flex the chain will go slack on the bottom. I've seen tons of worn out but never a bent sprocket, their pretty tough but anything is possible
|