Pulley spring Honda PCX / SH mode 125-150 Malossi

Yellow variator spring Malossi for Honda PCX 125/150 >2010 / SH Mode euro 3 / SH 150 2013 - 2016.

The Malossi springs are made of steel with a high carbon content silicon alloy, heat-treated to better withstand high temperatures, and do not lose their properties at high temperatures or with use.

The hardness of the clutch spring determines whether the mechanism opens the clutch to engage with the bell at higher or lower engine revolutions.
A stiffer spring will make the clutch "engage" at higher revolutions and, as a result, the motorcycle will take off faster from a standstill and you will notice better acceleration. That is, a soft spring is like starting in "second gear", with the stiff spring it is like starting in "first gear", 

Attention! In your choice, as if it is too stiff, you will need more power and higher RPM to start from a standstill.