primary transmission gear set Top Racing 13/42 ratio for Honda X8R, SGX

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. Simply exchange with the original parts and you’re done!. Not really suitable for 50cc cylinders. Top Racing factory specification: Ratio 13/42