Description
Polini is one of the big names in 50cc scooter tuning, and is also one of the leading manufacturers of tuning parts for Vespa, modern and vintage. Cylinders, intake manifolds, exhausts, air filters, carburetors, crankshafts and more - everything you need to boost the performance of your Classic Vespa.
This Polini Primary Transmission 22/63 helical Vespa 50cc PK / Special to change the gear ratio of your transmission.
Higher or lower gear ratio might be the deciding factor in how your scooter will perform. A higher ratio (shorter transmission) will make the engine reach maximum horsepower more quickly, meaning acceleration will be improved, sacrificing a bit of top speed. A lower gear ratio (longer transmission) has the opposite effect - higher top speed and slower acceleration.
This is a complete transmission with 22 / 63 gear ratio.
- reinforced primary transmission
- gear ratio 22 / 63
- helical (angled teeth)
Scooter gearbox
The transmission of scooters and some mopeds is located in a case behind the clutch and torque driver and has the function of reducing rpm and ultimately driving the wheel axle.
The transmission of a scooter has a direct influence on top speed. If the engine develops enough power and torque at low rpm, you can choose a longer gear ratio to achieve a higher top speed without any noticeable loss in acceleration.
Please note: if you don't have a press, better choose pre-assembled gears!
| Primary Transmission Polini 22/63 helical Vespa 50 PK / Special | |
|---|---|
| Article no. | P202.1219 |
| EAN | 8054705052101 |
| Weight | 0,78 kg |
| Brand | Polini |
| Product type | Transmission |
| Type | Primary |