Motore O.S. Speed R21 EURO 2 Edition
Earn 90 points/€2.70
(Each €5.00 spent = 1 point, 1 point = €0.03 discount)
Motore O.S. Speed R21 EURO 2 Edition
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 /Dust cap set/Exhaust seal ring
O.S. SPEED Flywheel Colette
