primary transmission gear kit Malossi HTQ 15/38 17.7mm countershaft diameter for Aprilia SR, Derbi GP, Gilera, Piaggio, Vespa M.

Malossi draw on 20 years of tuning transmissions. The Malossi HTQ 15/38 provides a longer ratio allows for higher top end speed. Longer ratios are only really suitable on tuned engines.

Kit is suitable for Piaggio engines from 1999 (gear and intermediate shaft are pressed).