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O.S.SPEED R21 EURO3 .21 3.5cc 7-ports On-road engine coming soon
Preorder NOW!
Arrive at end of October
Model no: 1FP00
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”.
