Description
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 the Polini Primary Transmission 15/38 (gear ratio = 2.53) Vespa ET2 98 / LX / LXV / S 50cc with straight teeth for reducing friction and heat.
15/38 -> gear ratio: 2.53 = +22.9%
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 Gears Polini 15/38 2.53 / +22.9% Vespa ET2 98 / LX 50cc | |
|---|---|
| Article no. | P202.1405 |
| EAN | 8054705052880 |
| Weight | 0,42 kg |
| Brand | Polini |
| Product type | Transmission |
| Type | Primary |
| Assembly | Press-fitting |
| Gear ratio | 15/38 (2,53) |
