A billit basket is stronger and will be more resistan to breaking and wearing notches in it. You have to bolt the factory gear on the back of the billit clutch basket.
You might need to pull the whole engine and clean out the oil pump sump. The oil pump probably locked up due to getting debre in it, wich means the screen is plugged. You might also want to pull the head cover and see what kind of shape the cam journals are in. It is the first part to get damage when the raptor is starved of oil.
2003 Limited Edition Raptor
Kenz 720cc 11:1 stroker, +1 valves, Mega Cycle X-4 Cam, Sparks 6x Big Core, Keihin 35mm FCR's. 158 mains, 52 pilots, fuel screws 2 turns out.
F.A.S.T. Dune Ported 4mill, CPI Inframes, Keihin PWK33's, Direct Drive Lockup. 158 mians, CEL needles second clip, #48 pilots, air scews 2.0 turns out.