O.S. Speed B2105 .21 Off-Road Race Engine

O.S.SPEED's off-road racing engine has further evolved. The O.S. Speed B2105 .21 Off-Road Race Engine, which has evolved into the fifth generation of the B21 series, is designed to secure power that gives an advantage in harsh off-road racing scenes, and pursues a driving feel that steadily demonstrates performance in any situation. By re-designing the cylinder liner and crankshaft, we have achieved smooth and linear power delivery.
Furthermore, the effect of a lighter outer head successfully improves drivability in any situation.

Spec

Displacement： 3.49 cc / 0.213cu.in.
Bore: 16.27mm / 0.641 in.
Stroke: 16.80mm / 0.661 in.
Output :2.68 ps / 2.64 hp / 34,000 r.p.m.
practical rpm range: 4,000-42,000 r.p.m.
Engine Weight:348g / 12.28 oz.

Standard accessories

Glow plug T-P3
Reducer φ6Ⅱ、φ6.5Ⅱ
Exhaust seal ring
Dust cap set 12-30(φ3、φ16、φ18)

Free ground shipping.