OS1CH01
The O.S. Speed B21 Adam Drake Edition 2 has further brushed up the previous model born with advice from world-leading pro racer Adam Drake.
O.S. finished the engine that could win a big race that matched Adam Drake's requirements. Bore x stroke of 16.4mmx16.55mm given only to this engine. Newly designed crankshaft for further improved driving feeling. Incorporating the latest engine factors, such as the inner head using an “O” ring with reduced vibration and dustproof performance, and the carburettor with a ball link that allows easy adjustment of the linkage used in B2103.
Features:
Specifications:
Stroke Volume | 3.49cc / 0.213 cu.in. |
Bore | 16.4mm / 0.646 in. |
Stroke | 16.55 mm / 0.652 in. |
Output | 2.65 ps / 2.61 hp / 34,000 rpm |
Practical Rotation Speed | 4,000-42,000 rpm |
Weight | 353g / 12.45oz |