OS Engines

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)

Spark Plug 1 4-32 RCE: GF30

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

Piston: 37SZ-H

Connecting Rod: Speed B2101, B2102

Silencer F-5030: FS81 Alpha

Assembly Screw: 55AX

Crankshaft: GF30

Cylinder Liner: GF30

Crankcase: 21XZ-R Speed

Carburetor Body: 61ER

Drive Shaft Fixing Screw: Sirius 7