This product is no longer in stock
Warning: Last items in stock!
Availability date: 10/19/2017
O.S. Speed R21 EU Spec On/Road 1/8 Race Engine
O.S. Engines have introduced their new Speed R21 EU Spec 03 3.5cc nitro on-road engine.
Devoloped for high speed track, witch require more power.
The piston and liner is newly designed.
Two holes in the piston contributes to reduce weight.
The liner is newly designed to increase top speed.
Displacement: 3.49 cc
Bore: 16.08 mm
Stroke: 17.2 mm
Practical RPM range: 4,000-45,000
Output: 2.76 hp @ 33,000 rpm