OS Speed .21 XZ-B (Spec III)
The successor of O.S. SPEED 21XZ-B spec.II.
Power in middle to top is more powerful than spec.II.
Newly designed crankcase and piston and cylinder.
The new outer head is 5mm lower than spec.II for lower gravity.
3-port exhaust makes air flow effective after combustion
|intended use||1/8 off road buggy|
|JAN code||4531028 02364 2|
|displacement||3.49cc (0.213 cu. Inch)|
|bore||16.27 mm (0.641inch)|
|stroke||16.80 mm (0.661inch)|
|practical rpm range||4,000 - 42,000 rpm|
|Max power||2.65 PS/34,000 rpm 2.61 HP/34,000 rpm|
|weight||353 g (12.45 oz)|