The SP Series includes the 5.7-horsepower, 169-cc SP170 displacement engine and the 7-horsepower, 211-cc SP210 displacement engine. Both engines have chain-driven OHC technology and a hemispherical combustion chamber. The position of the intake and exhaust valves lower resistance for the air/fuel mixture and a high compression ratio produces power and torque. Fewer moving parts and rigid mufflers reduce noise, lowering the decibel level by 2dBA.
Additional features include:
- Optimized combustion chamber design for one-pull starts
- Automatic decompression system to reduce required recoil pulling force
- 360-degree airflow around the intake and exhaust valves
- Precise lubrication system that lowers head temperature.