Description

3.46 cc capacity
Atsushi Hara won the 2008 1 : 8 World Off-Road Championships in North Carolina, USA with the OS SPEED POWER 21 VZ-B V-Spec II.

Aluminium heat-sink head for lower weight
Ceramic ballraces
Modified hard-plated crankshaft, finely dynamicallybalanced
Modified piston and liner
Modified Type 21 JS carburettor
Venturi inserts in sizes 7, 8 and 9, red eloxided aluminium