Not just building on the simple hybrid systems that already used in its existing production models, Yamaha has now presented the Series Parallel Hybrid Electric Vehicle (SPHEV) prototype, specifically engineered for the mid-class scooter segment.

This parallel hybrid system combines an engine with two electric motors fitted onto a modified XMAX scooter.

One of the electric motors is used to drive the wheels, while the other is directly connected to the engine to generate electric power.

Similar to any hybrid powertrain, the SPHEV system offers an electric driving mode that operates without engine assistance, a series hybrid driving mode for more efficient riding, and an engine operation mode for higher speeds.

Interestingly, the SPHEV system also features a boost mode.

The dual boost mode will harness power from both the engine and the drive motor, while the triple boost mode will utilize power from the generator motor.

In addition to scooters, Yamaha is also exploring the potential of this powertrain unit for integration with other models, such as street bikes and sports bikes.