O.S. SPEED B21 ADAM DRAKE EDITION 3 Racing Off-Road Buggy Engine
O.S. SPEED B21 Adam Drake Edition 3 is developed in collaboration with O.S. international team driver ADAM DRAKE, who is famous for his deep knowledge and sound technical advice.By adopting a boost bypass processing for the crankcase, the engine runs more smoothly, and making it even easier to drive. ADAM DRAKE's image color, blue anodized aluminum is applied to the cutting part of the new outer 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, 6.5II for buggy and 7.5 mainly for truggy.
Features:
- Newly designed cooling head; 3mm lower height for low gravity and 14g lighter. Black/blue double anodized head
- Back plate with steel lining like B2104 for friction resistance
- New crankcase inner design for linear power transition from low–middle–high speed
- Combo set is 75mm manifold with TB02 (T-2090) silencer for snappy low-middle range power
- Glow plug is OS SPEED P3 GOLD
By adopting a boost bypass processing for the crankcase, the engine runs more smoothly.
ADAM DRAKE's image color, blue anodized aluminum is applied to the cutting part of the new outer 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.
Specs:
- Displacement: 3.49cc
- Bore: 16.4mm
- Stroke: 16.55mm
- Output: 2.65ps / 2.61hp @ 34.000RPM
- Practical RPM range: 4.000-42.000
- Engine Weight: 350g
