O.S.SPEED R21 EURO II .21 3.5cc On-road engine 1DR00

Pre-Order O.S.SPEED R21 EURO II .21 3.5cc On-road engine 1DR00
Views: 2891 Brand: OS Speed
Product Code: 1DJ00
Availability: Pre-Order

O.S.SPEED R21 EURO II .21 3.5cc On-road engine

Model no: 1DR00

 

This engine inherits the smooth and easy-to-use feeling of the predecessor, O.S. SPEED R21 EURO Spec., And by reviewing the counterbalance of the crankshaft, low and mid end power delivery has been improved. The smooth RPM drop and idling stability are also improved, and the optimum performance is demonstrated even in the long and harsh race scene. Succeeding the previous model, every part has been improved including the outer head with new design to improve the cooling performance.

 

Spec:

Displacement: 3.49 cc / 0.213cu.in.

Bore: 16.08mm / 0.633 in.

Stroke: 17.20mm / 0.677 in.

Output:2.8 ps / 2.76 hp / 35,000 r.p.m.

practical rpm range: 4,000-45,000 r.p.m.

weight:340g / 11.99 oz.

Standard accessories

Glow plug RP7

Exhaust seal ring Dust cap set (φ3、φ16、φ18)

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