Parts such as the Rear Wheel (gsx-r750k4/k5): Wheel,rr(17m/cxmt5.50), Bearing(28x52x12), Seal,oil(37x52x8), Bearing are included in the Gsxr750x 2004 (k4) Usa (e03) Rear Wheel (gsx-r750k4/k5) parts fiche.
With five applications this Bolt(8x33) is the most specified part.