O.S. Engines

O.S. Cylindr & Piston Assy OS Speed R21GT

Venturi #61N: FS72A

Rocker Arm Support Assembly FS91-240

Needle Valve Assembly: 40G

Piston Ring: 56 FS

Piston Ring: 160FX

Exhaust Pipe Nut: FS-120 III

Metering Needle 12F2: 12XZ Speed Spec

Connecting Rod: 21XR-B Version II

Cylinder Liner: GT33

Gasket Set: FS-91-P

Head Gasket: 28XZ

Crankshaft: 21XZ-B Speed

Crankshaft: 37SZ-H

Crankshaft: 200 Surpass

Crankshaft: GT33

Intake Manifold: FS-120II

Intake Manifold: FT-120 160

Dust Cap Set, 10mm (3)

Muffler Body: 120Surpass

Cylinder & Piston Assembly: 28XZ

Carburetor Body: #60LH, 50SX-H

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

Cylinder & Piston: 12TR (P)-T