Spower's new factory-modified engine series: "魂II" (SOUL II)

Following the impressive success of the original SOUL B7HP factory-modified off-road racing engine, Spower has taken the next step with the B7HP SOUL II. Based on the long-stroke B7HP SOUL, the new B7HP SOUL II features a hand-modified piston/cylinder with a conventional 3-port design, delivering increased torque across the powerband.

The new crankshaft, with its more robust DLC coating, was also hand-modified and fitted with two tungsten counterweights. This contributes to a more stable idle and faster throttle response. Additionally, the engine comes standard with the Spower Boost backplate, which ensures stable performance across the entire rev range—from top speed to the bottom end. A new printing technology not only gives the cooling head a colorful look, but also allows it to blend seamlessly with the vehicle.

Combined with the Spower Japan 75mm exhaust manifold and the EFRA 2089 tuned pipe, the B7HP SOUL II delivers impressive performance for off-road racing – while maintaining excellent fuel efficiency.

Features:

1. Hand-modified 1/8 off-road racing engine

2. Pre-honed piston/cylinder unit

3. Spower Boost backplate included

4. Hand-modified conventional 3-channel design for more torque

5. Hand-modified DLC-coated crankshaft with two tungsten counterweights

6. Colored cooling head thanks to new printing technology     

• Technical data

•  

• Spower Japan B7HP SOUL II Factory Hand-Modified .21 Off-Road Racing Engine (Pre-Break-In)

• Displacement:  3.49 cm³ (0.213 cu.in.)

• Power:  2.72 PS / 2.70 hp at 37,000 rpm

• Bore:  16.27 mm (0.641 in.)

• Stroke:  16.8 mm (0.661 in.)

• Practical speed range:  4,000 ~ 44,000 rpm

• Weight:  347 g (12.38 oz) (motor only)