VSB05‑2146 – VS B05 Motor Kit + EFRA 2146 Resonator

The VSB05-2146 combo combines the VS B05 .21 (3.49cc) engine and the EFRA 2146 resonator, delivering linear power and excellent throttle control. Designed for 1/8 scale off-road racing, this package optimizes traction and engine response on all types of tracks.

The engine features a DLC-coated crankshaft, a 5-port cylinder liner, and a 22E-type carburetor for quick response and fuel efficiency. The EFRA 2146 resonator improves low- and mid-range power while optimizing engine stability and fuel economy. This combination is ideal for experienced riders looking to maximize their performance.

Technical specifications:

• Engine displacement: 3.49 cm³ (.21)

• Bore / Stroke: ~16.27 mm / ~16.80 mm

• Crankshaft: 14 mm Bi-Turbo DLC treated

• Shirt: 5 transfers

• Bearings: 7 mm (front) / 14 mm (rear)

• Includes: VS B05 motor, EFRA 2146 resonator, L50 elbow, springs and gaskets