Outer head

New outer head features low CG and better cooling efficiency.

Carburetor

A newly designed 21J2(B) carburetor includes 6, 6.5, and 7mm aluminum venturis. Even the smallest 6mm venturi doesn’t change its easy tuning characteristics.

Ceramic ball bearing

The black anodized crankcase adds a ceramic ball bearing in the rear to reduce rolling resistance.

Crankshaft

New crankshaft features lighter weight, DLC coating, tungsten weight and silicone