Could be many things, from the clutch, drive shafts, tranny, if all the tires spin and drive shafts too, could be the tranny stripped, or, slipper gear is too loose, or, clutch is messed up, or, if it is a two speed, could be something wrong with the gears inside tranny, doubt it is the clutch on the engine, if there is one there, it would react in some way i would think, if the drive shafts are good, i would move on to the tranny, make sure the slipper gear is tight, and check the gears inside the tranny, make sure they are all good, if it is a two speed, there are adjustment screws inside in the gears, that work almost like the clutch, except instead of clutch pads, there are fingers that pop out, could be a problem in there some were....hope it helps, my suggestion, tear it down and find that problem before you ruin it! Need more help? Email, i will send pics of parts and instructions!
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