NCY Compression Spring (GY6), 1500 rpm

Compression springs also known as contra springs do two things. First, they provide lateral pressure on the drive belt to prevent belt slip. Second, they determine the rate at which the CVT transmission changes from lower to higher gear ratios. 

For optimum acceleration, match the clutch pulley transition from lower to higher gear to the peak power of your scooter. 

For example:  If your scooter creates peak power at 7500 rpm and your current compression spring is transitioning to fully open at 6000 engine rpm, your acceleration will be slower than optimal.  Increasing the stiffness of your compression spring will increase the engine RPM required to achieve the highest gear ratio in this example.

Stiffer Contra Spring = More Belt Tension & Pressure + Higher RPM transition
Softer Contra Spring = Less Belt Tension & Pressure + Lower RPM transition

This NCY 1500 rpm compression spring is specifically for the GY6.

Measurements:

Wire Diameter: 4.2mm
Inner Diameter: 48.5mm
Length: 154.0mm

Looking for more performance upgrades? This spring is also available as part of our Stage 1 GY6 150 Performance Kit!

About NCY:  NCY stands as the premier provider of aftermarket performance components for leading scooter brands such as Honda, Yamaha, Genuine, Vespa, Piaggio, SYM, Lance, KYMCO, and GY6/QMB powered scooters. Established in 1997, NCY adheres to rigorous quality standards and holds ISO 9001 certification. 

NCY performance parts are made in Taiwan.