OS Engines

Crankcase: 21XZ-B Speed Spec II

Crankshaft: T1202 Speed

O.S. Cylinder and Piston Assy Speed B2103 Type R

Inner Head: R2102 Speed

Cylinder Head: 91HZR

Drive Washer: FF-240, 320

Connecting Rod: RXB/R/M

Muffler Assembly Screw: F6020 FS155A-P

Hex Head Screw M3 (10): 91SZ-H

Set Screw #2D #4BK-#5B

Security Ring: OMA-2810 OMA-2815

Cir Clip In-Flight Needle Valve

Carburetor 12F2-B: 12XZ Speed Spec 3

T-2080 Manifold Assembly

Outer Head: 12XZ Speed Spec II

Metering Needle Assembly 21M2(B) Speed: R2101

Outer Head: 21XZ-R Speed

Dust Cap Set, 16mm (3)

O.S. Carburetor Body 12F5(B) Speed T1203

Crankshaft: O.S. Speed R2104

Crankcase: 21XZ-GT Speed

Crankshaft: FS81 Alpha

Crankcase Plug: GT55

Crankshaft: 50SX-H