The most reasonably priced component used on the Cbr400rr 1989 (k) Japanese Domestic / Nc23-109 Starter is the Dowel,pin,8x14.
Some items from this specific schematic: Pin 10x44, Gear Starter Redu, Washer,spline,20m, Bolt,flenge,ubs,1.
Check out any of the seventeen Starter components enlisted.