primary transmission gear kit TOP RACING +33% 14/42 for 14 tooth countershaft

The Portuguese tuning specialists, Top Racing, are a symbol of high-quality scooter components. Thanks 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 choose the Portuguese brand. To increase performance and speed, you need more power and a longer gear. Since most vehicles are factory-fitted with a very short gear, you should fit a longer gear to protect the engine from over-revving. Top Racing primary gears are pre-pressed and ready for assembly. Simply replace the originals and you’re done! Not particularly suitable for 50cc cylinders. Fits Minarelli engines with the original intermediate shaft with 14 teeth. Top Racing ratio: ratio 14/42, 33% longer than the original. Tuned transmissions generally feature straight-cut teeth to reduce friction. This leads to slightly more noise, but is harmless.