O.S. Engines

OS Engines Crankcase: 21XZ-R VII

OS Engines Cylinder & Piston Assembly: 12XZ

OS Engines Carburetor Dust Covers: #12FB, 12XZ Speed

OS Engines Piston Pin Retainer: RX RZ XM

OS Engines Slide Valve #21JS

OS Engines Fuel Inlet Nipple: 12-240

OS Engines Under Cover: IL-300 Dia-Star

OS Engines Ignition Module IG-02: GT33

OS Engines Exhaust Header Pipe Assembly F-5050: FS-95V

OS Engines Lever Metering WLA-2: GT55

OS Engines Nozzle: 15FP-S RN

OS Engines O-Ring 10.5mm: GT55

OS Engines Pushrod Cover Assembly: 120Surpass

OS Engines Piston: 50SX-H

OS Engines Rocker Arm Assembly: 200 Surpass

OS Engines Screw Set (10): 46AX 55AX

OS Engines Throttle Arm Assembly: 40L, 55HZ Hyper

OS Engines Valve Spring: FS-70 91SII

OS Engines Stator Assembly: 5025-375 .50

OS Engines Rear Bearing: 61-300

OS Engines Carburetor Screw: FS61-FT300

OS Engines Connecting Rod: FT-120, 160

OS Engines Crankshaft: 91HZ-R Speed 3D 3C

OS Engines Heat Sink Head: 21TM