YAMAHA Front Pulley Set + Drive Face + Rollers + Cvt Spring Assy. For CYGNUS X 125 ABS/ UBS

1. Middle speed powerful: strong acceleration reaction from start to the middle, better than STD.

2. Extend end speed: as high-speed section, horse power output steady and better than STD.  longer high-speed performance effectively.

3. Transmission efficiency: the shift point is precisely at the engine's highest RPM range; reduce power loss.  Direct acceleration response; power output completely.