Product Introduction
The fifth-generation B21 series, the "B2105," features revised cylinder liners and crankshafts—the heart of the engine—to ensure power for an advantage in the harshest off-road racing conditions and to enhance driving feel in any situation.
This results in smoother rotation.
Furthermore, the lightweight outer head also contributes to improved drivability.
Specifications: Displacement: 3.49 cc, Bore: 16.27 mm, Stroke: 16.80 mm, Power: 2.68 ps / 2.64 hp / 34,000 rpm, Usable RPM: 4,000-42,000 rpm, Weight: 348 g / 12.28 oz.
Accessories: T-plug T-P3 (1), reducer φ6 II, φ6.5 II, exhaust seal ring (1), dust caps φ3, φ16, and φ18 (1 each).
*Fuel and other accessories are required to operate this product but are not included.
*This product does not use batteries. Batteries are not included.
*Fuel, charger, paint, adhesives, oil, grease, tools, etc. are not included.
Safety Warning
This engine is for model use only. Do not use for any other purposes.
Do not modify or disassemble the engine. This may result in injury or damage.
Fuel is toxic. Avoid contact with eyes or mouth. Store in a cool, dark place out of reach of children.
To prevent accidental ignition of the fuel, handle with careless handling.
The engine is hot during operation and immediately after operation. Do not touch with bare hands.
Driving indoors or in other poorly ventilated areas may increase the risk of carbon monoxide poisoning. Always drive outdoors.
A loud exhaust noise is generated while driving. Please drive in a location that will not disturb others around you.
The fifth-generation B21 series, the B2105, has been redesigned to ensure power to give an advantage in the harsh off-road racing scene, while also pursuing a driving feel in any situation. The cylinder liner and crankshaft, the heart of the engine, have been revised.
This has resulted in a smoother increase in rotation.
Combined with the effect of a lighter outer head, this has also resulted in improved drivability.
