Not very common with the warrior. Did you replace the gear and the oneway? If you replaced both, you may have to look elsewhere. DOes the engine kick back into the starter alot? Could be a timing issue. Do you kill it often and start it in gear? This is said to be hard on the one way. Maybe your starter is getting weak and not keeping the oneway engaged during cranking..
01' Raptor 720, Stage 2, FCR'd
97' 250 Vitos Blaster
07' Rhino 660, 06' Rhino 450
94' Banshee T-5's, Vforce, ported, Cool Head, 2-1
06' Wolverine 450 - Stock!
06' LTZ 440
94' Vmax4 750, 96' 600 MountainMax
06' Vmax 1200