We have achieved an overall increase in power output while maintaining the smooth, flat power characteristics of O.S. SPEED R21 EURO2.

Crankcase:

Features the proven R21 EURO2 crankcase with ceramic bearings.

Crankshaft:

We have selected the R2105 crankshaft, which features two tungsten weights (4.5 mm diameter). This contributes to improved throttle response.

C&P

The cylinder liner features a newly designed structure that offers excellent overall balance. The piston is same as R2106, but it has undergone a special treatment to enhance its resistance to seizure.

Innerhead:

Innerhead features a redesigning of fin for better heat management.

Outerhead

Outerhead retain the signature black color of the O.S. SPEED with newly designed laser logo.

Carburetor:

Features the dust cover to avoid fuel leakage and air in the line with “Dust cover ring”.

Other:

Other internal parts are identical to R2106.