Stefano Benelli's gear parts enjoy a very good reputation in the racing scene.
If you are looking for reliable racing technology for your gearbox, you will find it here.
Hardened to an average of 60 HRC, the Benelli parts offer exactly the perfect balance of sufficient hardness and necessary elasticity to withstand the enormous loads in a racing engine permanently.
Benelli also offers the reinforced main shaft for the Vespa small frame engines, which is included in the BULL complete gearbox, separately. It can be used with all common gears.
(US)