O.S. Speed B21 Adam Drake Edition 4 .21 Off-Road Race Engine

O.S. Engines would like to introduce new O.S.SPEED B21 ADAM DRAKE 4. Latest collaboration engine with world famous O.S. Team driver Adam Drake. Cylinder liner, crankshaft, outer head has been redesigned to Adam Drake’s spec for better balance, more torque and more power for better driving performance.

Spec
Displacement： 3.49 cc / 0.213cu.in.
Bore: 16.4mm / 0.646 in.
Stroke: 16.55mm / 0.652 in.
Output :2.65 ps / 2.61 hp / 34,000 RPM
Practical RPM range: 4,000-42,000 RPM
Engine Weight:352g / 12.42 oz.

Standard accessories
O.S. P3 glow plug
Reducer　6II (blue) AL2・Reducer　8mm (blue) AL
Exhaust seal ring
Dust cap set 3mm/16mm/18mm

Free ground shipping.