Os Engines R2103 European Edition .21 Nitro On-Road Engine - Osm1C400

Product Information
O.S. SPEED boasts the engine high-performance series "R21" for ON ROAD, and one new engine of interest is added to the line-up. This O.S. SPEED R21 EURO Spec. is an engine compatible with the high-speed course which thoroughly pursued the growth of the top speed by changing the port timing of the crankshaft and the cylinder/piston.

"EURO Spec" dedicated cylinder/piston is adopted. In addition, a dedicated design outer head is also equipped.

Specs
Displacement:
3.49cc (0.213cu.in.)
Bore:
16.08mm (0.633in.)
Stroke:
17.2mm (0.677in.)
Practical rpm range:
4,000 - 45,000rpm
Max. output:
2.8ps (2.76hp)
Weight:
340g (11.99oz)