secondary transmission gear up kit Top Racing +21% 15/42 for CPI, Keeway

The Portuguese tuning specialists, Top Racing, are a symbol of high quality scooter components. Due to Advanced production techniques, and over 50 years of experience many European brands entrust their tuning to Top Racing. The relatively simple installation of The Top Racing transmission is another reason to look no further than the Portuguese brand. To increase performance and speed, you need more power and also a longer gear. Since most vehicles are factory-fitted with a very short gear, you should assemble a longer gear to protect the engine from over-revving and can use more speed. As with the Malossi gear, the secondary transmission of Top Racing must be pressed with the stock Primary gears of the intermediate shaft. With a little skill, this is not too difficult. Top Racing ratio:: longer 15/42 +21% than the original transmission.