The O.S.SPEED R21 SHIMO EDITION2 is the result of feedback from O.S.SPEED support driver Takaaki Shimo. Based on the R21 series, the new crankshaft design emphasizes the connection from low speed to high speed, and the cylinder liner is a 7 port base with a new process to reduce seizure. performance. The TR02 (EFRA2165) + MR03-WC set maximizes the power of the engine.

Specifications:
Line Volume: 3.49 cc / 0.213cu.in.
Bore: 16.08mm / 0.633 in.
Stroke: 17.20mm / 0.677 in.
Power output: 2.8 ps / 2.76 hp / 35,000 r.p.m.
Operating speed: 4,000-45,000 r.p.m.
Weight: 340 g / 11.99 oz.
Standard accessories
T plug RP7 1 pc.
TR02 EFRA2165 Tuned Silencer 1 pc.
MR03-WC exhaust manifold 1 pc
O.S. SPEED Flywheel Collet 1 pc
Exhaust Seal Ring 1 pc
O.S. SPEED Dust Cap Set 12-30, φ3, φ16, φ18 each 1 piece