Top performances 15/41 secondary gearbox for minarelli

Top performances now offers a secondary gearbox for your vertical, or horizontal (euro case) minarelli! 

This taller gear ratio will allow you to achieve higher top speeds 

Fits lots of bikes, including aprilia sr50 (minarelli models), and 1989-2001 yamaha zuma

Includes new axle and gearbox gasket also