O.S. Engines

Control Arm: #9B

Muffler E-5040: GT22

Piston: 61-300

Crankshaft: FS72 Alpha

Carburetor Rotor: 91SZ-H Hyper

Induction Silencer .12/.21: INS

Drive Hub: 140RX

Carburetor 21J3-B: Speed B21 Adam Drake

Under Cover Gasket: IL-300 Dia-Star

Crankshaft: GT15

Carburetor Rotor: 70T, GF30

Crankshaft: FT-120 160

Cover Plate: 25XZ

Cylinder Piston Assembly: R21

Cam Cover: FS-20 Supass

Carburetor Body: 21M(B), 21XZ-R Speed

O.S. Inner Head with O-Ring Speed B2103 Type R & S

Pushrod: 200 Surpass

Connecting Rod: 37SZ-H

Cylinder Rebuild Kit: 21XR-B

Outter Head: O.S.SPEED R21GT2

Cover Assembly Metering WLA-2: GT55

Drive Washer: 12CV

Cover Plate: 65LA