How many miles on the clutch?
Some clutches can be just plain worn out.
You need to check to see that the tower lands are not grooved at all. that they are flat(not wallowed out in the center of the travel) and not spread out (both sides are parallel to each other).
Also, the clutch faces need to be nice and smooth and not grooved as well.
Throwing good parts in a worn out clutch does not make it better, IMO.
Make sure the taper is clean and rust free (it should be "chased" with a taper reamer).
Lastly, it should be shimmed for the belts you are using ...probably a 3211080 belt.
There are so many people I have encountered that have a great clutch kit, great pipe and can, track and all the other goodies and the belt side clearance is not shimmed properly and the deflection is not set either. Such a simple thing, that makes a huge difference in how the sled performs, but they skip this step.
Good luck