OS Engines

Built-up Parts Set for Cylinder & Piston: O.S. Speed R2104

Crankcase: B2101 Speed

55HZ-H Hyper Ringed .55 Helicopter Engine

Crankshaft: 25XZ

Head Gasket: 30VG

Cylinder & Piston Assembly: 12XZ

Cylinder & Piston Assembly: 21XM V2 Outboard Marine

18TM Revo Manifold

Needle High Speed WLA-2: GT55

Throttle Lever #1A-#3A

Piston: 55HZ Hyper

Mixture Control Screw #10ER

Idle Gear: IL-300 Dia Star

Cap Screws M3 5x20(10): FL-70

Rocker Cover Retaining Screws: FS-200S

Connecting Rod: 120AX

Standoff 5x25.4mm 1" (4): GT55

Muffler Screws #744B

CYLINDER/PISTON/ROD SET OS SPEED R21 EURO II

Cylinder Head: FS72 Alpha

Fuel Inlet Nipple: 12-240

Piston Pin Retainer: BGX 3500

Gasket Set: 12TG

Mixture Control Valve: #60K