The OS SPEED B21 ADAM DRAKE 4 is a limited-edition, high-performance motor for 1/8 scale off-road racing. Developed in collaboration with legendary professional racer Adam Drake , this motor combines maximum performance with exceptional reliability and efficiency.

Adam Drake is a fixture in international 1/8 off-road racing and has relied exclusively on OS MAX engines in his Mugen race cars for years. The B21 Drake 4 was specifically developed for competition and offers significantly improved torque as well as particularly precise throttle response in the low and mid-range RPMs.

The engine features a redesigned cylinder and piston , a DLC-coated crankshaft with tungsten weights for perfect balance, and a two-tone cooling head with optimized cooling performance and a lower center of gravity.

Key features

• Limited Adam Drake 4 Edition
• Designed for 1/8 scale off-road buggy and truck competitions
• Revised cylinder and piston for higher torque
• DLC-coated crankshaft with double tungsten weights
• High-quality two-tone cooling head with efficient cooling
• Ceramic rear bearings for maximum efficiency and durability
• Very good throttle response in the lower and mid-range RPM
• Low fuel consumption

🏁 Advantages in racing operations

The B21 Adam Drake 4 was specifically designed for demanding racing conditions and offers:

• strong acceleration out of corners
• Stable mid-range power
• precise throttle response
• high efficiency and durability

This makes this engine an ideal choice for 1/8 scale off-road racing at a competitive level .

Technical data

• Engine displacement: 3.49 cm³
• Bore: 16.40 mm
• Stroke: 16.55 mm
• Channels: 5 + 3
• Speed ​​range: 4,000 – 42,000 rpm
• Power output: 2.65 hp at 34,000 rpm
• Weight: 352 g

📦 Scope of delivery

• OS SPEED B21 Adam Drake 4 engine
• 6.5 mm diffuser
• 8.0 mm diffuser