Description: 

O.S.SPEED's off-road racing engine has undergone a further evolution: the B2105, the fifth generation of the B21 series, has been designed to provide the power needed to gain an advantage in the toughest off-road racing conditions and to deliver driving feel in any situation, The cylinder liner and crankshaft, the heart of the engine, have been changed. The cylinder liner and crankshaft, which are the heart of the engine, have been changed to achieve a smoother revving.
Furthermore, the lightweight outer head also contributes to improved drivability.

Specifications: ---------------------------
Lines per cylinder volume: 3.49 cc / 0.213 cu.in.
Bore: 16.27 mm / 0.641 in.
Stroke: 16.80 mm / 0.661 in.
Output: 2.68 ps / 2.64 hp / 34,000 r.p.m.
Operating speed: 4,000-42,000 r.p.m.
Weight: 348 g / 12.28 oz.

Standard accessories: ---------------------------
T-plug T-P3 1 pc.
Reducer φ6II, φ6.5II, 
Exhaust seal ring 1 pc.
Dust cap φ3, φ16, φ18 each 1 pc

TB02 EFRA2089 & MB01-75