Press Release From OS Engines:
www.osspeed.com/jpn/index.html
O.S.SPEED’s off-road racing engine has additional advanced. The B2105, which has advanced into the fifth era of the B21 collection, is designed to safe energy that provides a bonus in harsh off-road racing scenes, and pursues a driving really feel that steadily demonstrates efficiency in any scenario. By re-designing the cylinder liner and crankshaft, we’ve got achieved clean and linear energy supply.
Furthermore, the impact of a lighter outer head efficiently improves drivability in any scenario.
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.
sensible rpm vary: 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)