OS SPEED B21 Adam Drake Edition 4 with (2090SC + MB01-75) Complete Set

This is the New O.S. SPEED B21 ADAM DRAKE 4 engine combo with T-2090SC+MB01-75 exhaust system.

Features:

• Based on OSB21
• AD4 Cooling-head with extra fin for better cooling.
• AD4 specific cylinder design for more torque.
• AD4 DLC coated crankshaft with new modified inner diameter for better low and mid range power.
• Inner head with silicon O ring for reducing vibration and preventing dust
• AD specific blue restrictors.
• Rear-cover with thrust plate reduces friction against the connecting rod to extend its life.
• Long stroke 16.8mm engine
• Ceramic Main-Bearing

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 r.p.m.
• Practical RPM range: 4,000-42,000 r.p.m.
• Engine Weight:352g / 12.42 oz.

Includes: 

• Exhaust system T-2090SC+MB01-75
• T-P3 plug
• 6mm Venturi
• 8mm Venturi
• Exhaust Gasket
• Dust Cap Set (3mm/16mm/18mm)