2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 161Get this manual
RECOIL STARTER AND CDI MAGNETO
2.Install: Starter spring Sheave drum assembly NOTE: Mesh the spring hook with the case slit, then wind the spring clockwise into the case from the larger to smaller diameterMesh the sheave drum hook with the spring hook 53.Install: Spring Friction plate Nut NOTE: Insert the spring hooks into the pawl side holes