O.S. Speed B21 Adam Drake Edition 4 Engine

Just announced is the new O.S. Speed B21 Adam Drake Edition 4 engine for competitive racing.

O.S. Engines would like to introduce the new O.S.SPEED B21 ADAM DRAKE 4. It is the latest collaboration engine with world famous O.S. Team driver Adam Drake. Cylinder liner, crankshaft, inner head button, and outer head has been redesigned to Adam Drake’s spec for better balance, more torque and more power for better driving performance.

SPECIFICATIONS

• Displacement： 3.49 cc / 0.213cu.in.
• Bore: 16.4mm / 0.646 in.
• Stroke: 16.55mm / 0.652 in.
• Output :2.65 ps / 2.61 hp / 34,000 RPM
• Practical RPM range: 4,000-42,000 RPM
• Engine Weight:352g / 12.42 oz.

STANDARD ACCESSORIES

• O.S. SPEED P3 glow plug
• Reducer 6II (blue) AL2・Reducer 8mm (blue) AL
• Exhaust seal ring
• Dust cap set 3mm/16mm/18mm

For more information, visit: O.S. ENGINES