OS Engines

Drive Washer: 12TR

Piston Ring: 46SF H

Exhaust Pipe Nut: FS-120 Surpass

Exhaust Pipe Assembly: T-120 160

O-Ring: 21TM

Throttle Link WLA-2: GT55

Carburetor Rotor: 80T Sirius 7

Piston Pin Retainer: GT55 (2)

Cover Plate: FSa-72II

Crankcase: GGT15

Gasket Exhaust: GT55

Rocker Cover: 120 Surpass

Cylinder Liner: FS-70 Surpass

Breather Nipple: 120-300

Cylinder/Piston/Rod Set: O.S. Max .12 TG Version 4

Crankshaft: GT60

Hex Head Screw 5x55mm (10)

Valve Exhaust: FS-120 Surpass

Inner Head: O.S.SPEED R21GT2

O.S. Pistion Pin: .12XZ

Screw Set (10): 46AX 55AX

Carburetor Body: 21M

Piston: FS-120

Inner Head: O.S. MAX-B21