OS-Speed Adam Drake AD3 .21 Off Road Engine

Description

O.S. SPEED B21 Adam Drake Edition 3 (AD3) is developed in collaboration with O.S. Speed. By adopting a boost bypass processing for the crankcase, the engine runs more smoothly, and making it even easier to drive. ADAM DRAKE’s signature, blue colored anodized aluminum is applied to the cutting part of the new outer cooling head, and two-color anodized aluminum with new design is used to reduce weight and lower the center of gravity and improve driving performance.

You can make a choice of two different carburetor restrictor, 6.5 for buggy and 7.5 mainly for truggy.

Please note this may come in a combo box with no pipe rather than a seperate engine box.

Spec—————————

Displacement： 3.49cc / 0.213 cu.in.

Bore: 16.4mm / 0.646 in.

Stroke: 16.55mm / 0.652 in.

Output 2.65 ps / 2.61 hp / 34,000 r.p.m.

Practical RPM range: 4,000-42,000 r.p.m.