OS Engines

O.S. SPEED R21GT2 Combo Set

Carburetor Reducer 7mm, Yellow: 21XZ-B

O.S. Speed R21GT2

91HZ-R 3D Speed Helicopter Engine, Black

Drive Washer: 25LA-S

Mixture Control Valve: 46AXII

Piston: FS-91 Surpass FT-160

Crankcase: 46AXII

Rear Housing: 21XM

Built-Up Parts Set (C&P) O.S. Speed T1204

Carburetor Dust Covers: #12FB, 12XZ Speed

Carburetor Reducer 6.5mm, Red: B2101 Speed

Carburetor Reducer 7mm, Red: Speed 21 V-Spec

Cover Plate: 105HX-R

Slide Valve #21JS

105HZ-R DRS 1.05 Helicopter Engine

Rear Bearing: 21VZ, 30VG

Drive Shaft Nut: 21XM

Pushrod Cover Assembly: FT-120-240

Cylinder Liner: F91, 160, 320

Piston: 61-300

PowerBoost Pipe: 105HZ

Inner Head O-Ring O.S. T1204 (S30-FKM)

Connecting Rod: 37SZ-H