Won't apply power at full throttle

[Lightningfastrcman]

Savage XL, just got it started for the first time in a while and I noticed that at kow power it would give power fine, but when I increased the throttle past about 1/2 or 3/4 of the way it would rev up really high and stop applying power. The engine sounds fine other than the fact that its not quite perfectly tuned yet. I took it apart and found that the motor mount was loose and that one of the bearings was destroyed, so I figured it must have been the pinion moving away from the spur. But when I fixed those problems, it still revved too high and stopped applying power. Is this a drivetrain issue? Clutch? Transmission?
Any help is appreciated.

 

[Jam Racing 1]

I would say to check the clutch for either being loose or the pad being worn out.... when I set my clutch I run the adjuster fully tight and with an axial .32 it seems to be fine...

 

[savagemanXL]

Check the slipper clutch, it may be too loose. Tighten all the way then back off 1/4-1/2 turn. Book says 1/2, but I find 1/4 works best.
If not slipper clutch, then main centrifugal clutch shoes may need replacing.

Cheers.