for PIAGGIO CIAO/ PX/ SI/ Bravo/ Superbravo/ Grillo/ Boss primary straight teeth Product description Because of the straight toothed arrangement of the newMALOSSIHTQ gear cogs it is possible to reduce frictional losses as well as pressure on the bearings to a minimum. A beneficial side effect is naturally the extension of the transmission and therefore the increase in top speed.Long gear MALOSSI HTQ straight teeth, for Variomatik scooters, >> primary shaft 11 teeth, secondary shaft ‘1’ 11/30 teeth, secondary shaft ‘2’ 23 teeth, output shaft 36 teeth.OEM numbers (for comparisons): 67 7021 (MALOSSI)