O.S. Engines

Throttle Lever Nut #2CK #2H

Pushrod: FR5

Rocker Cover: FT-160

Screw Set (8): 25LA

Cylinder & Piston Assembly: 28XZ

O.S. Built-Up Parts Set Cyl Piston OS Speed R21GT

Cylinder & Piston: 12TR (P)-T

Crankcase: 21XZ-B Speed

Crankshaft: 70SZ-H

O.S. Cylindr & Piston Assy OS Speed R21GT

Needle Valve Assembly: 40G

Piston Ring: 56 FS

Piston Ring: 160FX

Metering Needle Assembly 21M2(B) Speed: R2101

Exhaust Pipe Nut: FS-120 III

Metering Needle 12F2: 12XZ Speed Spec

Carburetor Body: 12F2-B, Speed T1202

Cylinder & Piston: T2101 Speed

Inner Head: speed 21XZ-B Spec III

Outer Cylinder Head: R2103 Speed

Cylinder Head: 91SX-H Complete