O.S. Speed B21 Ronda Drake Edition 2

O.S.SPEED B21 Ronda Drake Edition 2 Engine

Introducing new RONDA DRAKE EDITION 2 produced by Ronda Drake, the wife of world renowned professional racer, Adam Drake. The newly designed outer head has improved performance by reducing weight and lowering the center of gravity, adopting two-color anodized aluminum with pink accents, which is her image color, based on black, and two-color printing on the graphic on outer head. Adopting a cover plate with a thrust plate to improve the durability for advantages in the races. The reducer comes standard with 6.5II (for buggy) and 7.5 (for truggy).


By using a boost bypass processing for the crankcase, the rotation is increased smoothly, making it even easier to handle


The outer head adopts a new design. Lighter weight and lower center of gravity improve driving performance even in high-grip conditions


By using a thrust plate in the backplate, wear due to interference between the connecting rod and the cover plate during rotation is reduced and engine life is improved


The inner head uses an O-ring to reduce vibration and improve dust resistance


6.5IImm for buggy and 7.5mm for truggy are included as standard reducers using pink aluminium


Optional: TB02 EFRA2089 (T-2090SC) + MB01-75 (M2000SC) exhaust


Specs:

• Displacement: 3.49cc
• Bore: 16.4mm
• Stroke: 16.55mm
• Output: 2.65 ps / 2.61 hp @ 34.000RPM
• Practical RPM range: 4.000-42.000
• Engine weight: 350g

Includes:

• Reducer: 6.5II & 7.5mm)
• O.S.SPEED P3 glow plug
• Exhaust seal ring (1pc)
• Dust cap set (3mm, 16mm, 18mm - 1pc each)