- Weight: 353g
- Displacement: 3.49cc
- Bore: 16.40mm
- Stroke: 16.55mm
- Power Output: 2.65PS/2.61HP @ 34000RPM
- Practical RPM Range: 4000-42000
This new edition comes with a new design cylinder liner with new porting and a new design crankshaft with double tungsten counterweight. The new bore x stroke is designed with Adam Drakes's requirements in mind. This OS engine includes some carburetor reducers (6.5mm and 8.0mm) to suit both powerful drive and fuel economy drive OS SPEED 5. P3 GOLD plug is used for more consistent idling.