OS Engines Adam Drake AD3 Engine

Press Release From The Drake Racing:
www.thedrakeracing.com

O.S. SPEED B21 Adam Drake Edition 3 (AD3) is developed in collaboration with O.S. Speed. By adopting a boost bypass processing for the crankcase, the engine runs more smoothly, and making it even easier to drive. ADAM DRAKE's signature, blue colored anodized aluminum is applied to the cutting part of the new outer cooling head, and two-color anodized aluminum with new design is used to reduce weight and lower the center of gravity and improve driving performance.

You can make a choice of two different carburetor restrictor, 6.5 for buggy and 7.5 mainly for truggy.

Spec---------------------------

Displacement： 3.49cc / 0.213 cu.in.

Bore: 16.4mm / 0.646 in.

Stroke: 16.55mm / 0.652 in.

Output 2.65 ps / 2.61 hp / 34,000 r.p.m.

Practical RPM range: 4,000-42,000 r.p.m.

Engine Weight: 350g / 12.35oz

• By adopting a boost bypass processing for the crankcase, the engine runs more smoothly
• ADAM DRAKE's blue colored anodized aluminum is applied to the cutting part of the new outer cooling head, and two-color anodized aluminum with new design is used to reduce weight and lower the center of gravity and improve driving performance.
• In addition, by adopting a cover plate with a built in thrust plate, 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.
• Blue anodized restrictors, 6.5mm for buggy and 7.5mm for truggy comes standard.