Gear Set, Top Racing Primary Drive for 50cc 4-Stroke 139QMB Scooters

Top Racing Primary Drive Gears for 50cc 4-Stroke 139QMB Scooters

COMPATIBILITY:

• BMS – Apache 50 4T, Heritage 50 4T
• Diamo – Classic 50 4T
• Kymco – Agility 50 4T, Filly 50 4T, Sento 50 4T, Like 50 4T, Vitality 50 4T
• Lance – Charming 50 4T, GTR 50 4T
• Roketa – Bahama 50 4T, Maui 50 4T, Sicily 50 4T
• Tank – Urban 50 4T, Sporty 50 4T, Viaggio 50 4T
• Many Other 50cc 139QMB Based Engines
• **This will not work on the QJ models

Available in 17/51 and 18/50.

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 fit a longer gear to protect the engine from over-revving. Primary gears by Top Racing are pre-pressed and ready for assembly. Simply swap out the originals and youre done!

Not recommended for 50cc cylinders. Suitable for Chinese 4-stroke 50cc Kymco scooters and 4-stroke models. Tuned transmissions generally feature straight toothing, in order to reduce friction. This leads to slightly more noise, but is harmless…

**NOTE: DELIVERY MAY TAKE UP TO 2-3 WEEKS**

**MADE IN PORTUGAL**

**NOTE: Electrical, High Performance, Aftermarket items are non-returnable so please check photos and specifications before ordering.

Please see our Warranty and Returns Policy