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2026 new! OS Speed R21 EURO3 .21 Ceramic bearing On-road engine with TR03 EFRA2196 & MR05 exhaust pipe combo set coming soon
Preorder now!
Arrive at end of October
Model no: 1FP01
We would like to introduce new O.S. SPEED R21 EURO3.
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.
For Combo set, it comes with TR03 EFRA2196+MR05
