After a long testing time finally ready and for sale.
Modified Leader rear pulley for non-rolling nut engines.
Race-proven quality! better acceleration, less slipping of the belt.
Necessary for high-power engines to put the power on the street and not lose it in a slipping belt.
Can be mounted with the original Piaggio belt or with the big leader belt for the highest-power engines.
Shims and bolts included, without belt.