Yamaha TW 125 Service Manual - 1999 | Screw | Piston
Install: S oil pump shaft 1 (to the oil pump cover 2 ) S pin 3 S inner rotor 4 S outer rotor 5 S pin 6 S oil pump housing 7 S screw 8 7 Nm (0.7 mSkg) NOTE: When installing the inner rotor, align the pin 3 in the oil pump shaft with the groove a on the inner rotor 4 .