Description
Variator Polini Maxi Hi-Speed Kymco Downtown 125i.
The Polini "Maxi Hi-Speed" variator for maxi scooters is an excellent value for money CVT. The CVT, with the variator being one of the pulleys, has the task of changing the gear ratio continuously. This enables the engine to run at its most efficient RPM regardless of the vehicle's speed.
The Maxi Hi-Speed was optimized over its predecessor: The design of the roller tracks was completely revised to make even better use engine power and torque. The variator sleeve is lubricated with a special grease, with two seals preventing the lubricant from leaking. This reduces friction and wear and consequently minimizes maintenance and increases the service life. The overall performance of the variator was improved, with efficient variation, smooth shifting and great acceleration at every speed.
- Revised roller tracks, 6 weights
- Sealed internal lubrication system
- Improved acceleration and top speed
- Extended service life
Including 6 weights 20x17mm - 9g / 11.8g.
Fits the following models (according to Polini):
KYMCO: DOWNTOWN 125i 4V (SK25) - PEOPLE 125 GTi 4V (BF25) - K-XCT 125 i 4V (SK25B) - DINK STREET 125 ie (SK25) - G6E 125 ie (SR25F) - G6E 150 ie (SR30F) - RACING 125 ie (SR25B) - RACING 150 ie (SR30B) - SUPER DINK 125 ie (SK25) - PEOPLE 150 E4 2018->
KAWASAKI: J 125 ie LC 2016 ->
Polini Hi-Speed
The famous Polini brand lists their "Hi-Speed" CVT as part of their catalog for many years. Of course, the CVT has been upgraded and improved over time, but the basic principle is still the same: a tuning variator for original and slightly tuned engines with a noticeable increase in performance compared to the original variator.
Performance Polini High Speed CVT
With newly calculated and optimized angles, the Hi-Speed variator allows an extended power band. This shows above all in noticeably better acceleration, but also in a slightly higher top speed.
Two integrated O-rings provide the sleeve with better lubrication, resulting in less friction.
The low-friction, robust chrome coating ensures reduced wear and increased service life.
For heavily tuned engines and engines with a significantly larger displacement, it is worth using an overrange CVT.
scooter CVT
Modern scooters are equipped with a continuously variable transmission, the so-called CVT, also called variator.
CVT Parts:
- Front pulley, movable. It contains the variator weights and has a special shape with an inclined surface to allow the V-belt to move freely up and down.
- Ramp plate: Holds the weights in place.
- Variator sleeve: Serves as a bearing for the variator, which moves axially back and forth, i.e., opens and closes.
- CVT roller weights: Adjustment weights that play a critical role in function and performance.
original, Sport and Oversize CVTs
- Original: Original or OEM quality CVTs are equipped with a restrictor to limit the speed to 45km/h. There are riders who remove the restrictor to derestrict their scooter and unleash the full performance without restrictions.
- Sport: Sport CVTs are lighter than the original and are characterized by special angles and a special coating, which increases the top speed, but especially acceleration.
- Oversize: Based on the same principle as the Sport CVT, but has larger dimensions. With an oversize / overrange vario, the performance of the scooter can be increased even further.
You should also always replace the V-belt when replacing the CVT or go for a complete CVT kit.
How to install a CVT transmission ?
| CVT Variator Polini Maxi Hi-Speed Kymco Downtown 125i | |
|---|---|
| Article no. | P241.721 |
| EAN | 8054705075513 |
| Weight | 1,12 kg |
| Series | Hi-Speed |
| Brand | Polini |
| Product type | CVT |
| Roller size | 20 x 17 mm |
| Roller weight | 9,0 gr, 11,8 gr |
