1CJ00 OS SPEED B21 ADAM DRAKE EDITION 3 (Engine Only)

O.S. SPEED B21 Adam Drake Edition 3 is developed in collaboration with O.S. international team driver ADAM DRAKE, who is famous for his deep knowledge and sound technical advice. By adopting a boost bypass processing for the crankcase, the engine runs more smoothly, and making it even easier to drive. ADAM DRAKE #39;s image color, blue anodized aluminum is applied to the cutting part of the new outer 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, 6.5II for buggy and 7.5 mainly for truggy. 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. Engine Weight: 350g / 12.35oz