Reinforced counter pressure spring from Malossi for the rear converter for 125ccm and 150ccm maxi scooters with GY6, Kymco, Honda or Piaggio iGet engines. The counter-pressure spring applies the pressure to the V-belt, which means that it no longer tends to slip and the traction on the belt is increased. Useful for tuned vehicles and problems with slipping belts. Simply exchange for the original. Unfortunately, Malossi does not specify for maxi scooters to what extent the pressure changes compared to the OEM counter pressure spring. However, the spring stiffness (K) and the length of the spring are specified. Thus the springs can at least be compared with one another. In principle the following applies to large scooters: 1. Green counter pressure springs are softer than the OEM spring 2. All other springs are harder than the OEM spring 3. The higher the (K) value, the harder the spring 4. With the same (K) value, the longer spring is harder