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. Combo Set 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.
"T-2080 SC tuned silencer" and "M2001SC exhaust manifold" are also included in this combo set.
OS Engines R2103 European Edition .21 Nitro On-Road Engine and T-2080SC Pipe Combo
- Developed for high-speed tracks, which require more top speed.
- The piston and liner are newly designed.
- Two holes in the piston contribute to reducing weight.
- The liner is newly designed to increase top speed.
- Stroke volume:
- 3.49 cc / 0.213 cu.in.
- 16.08 mm / 0.633 in.
- 17.20 mm / 0.677 in.
- 2.8 ps / 2.76 hp / 33,000 r.p.m.
- Practical rotation speed:
- 4,000 - 45,000 r.p.m.
- 340 g / 11.99 oz