It is not uncommon for those bolts to shear, I remember reading that it was probably from coming loose. Inspect your one way roller bearings and the 52 tooth gear that they engage to. If they look galled you would be better off getting an aftermarket oneway. They are much stronger and designed much better.
01' Raptor 720, Stage 2, FCR'd
97' 250 Vitos Blaster - Big Bore Stroker
85' Tri-Z - YZ PV, Pipe = Stupid
94' Banshee T-5's, Vforce, ported, Cool HEad, 2-1
06' Wolverine - Stock!
06' Rhino 450
06' LTZ 440