Description
Polini Hi-Speed variator
Polini Variator Hi Speed Evolution 2 D.14.8mm Piaggio Zip / Typhoon, for Piaggio engines with 14,8mm stub. This is the EVO 2, the further developed and improved version of the already very powerful Hi-Speed CVT.
Advantages of Polini Hi-Speed CVT
Polini drew on their considerable racing and tuning experience to design a CVT that represents a definite upgrade to the stock part, with smooth and stable transmission and better acceleration from take-off to top speed. Your scooter will rev up a bit more aggressively and reach higher top speeds.
For the EVO 2 version the Polini engineers opted for a DLC (Diamond Light Carbon) bushing - light, low friction, sturdy. Two high quality oil seals ensure constant lubrication. The cores of the variator roller weights have polished sliding surfaces, the outside shells come with a heat- and wear-resistant Nylon / Aramid coating.
The contra spring (plus anti-torsion spring seat) has a spring tension of +8%, so it is a bit harder than the stock spring.
The Polini Hi-Speed is the perfect CVT for any Sport or even Racing set-up.
Details Polini Hi-Speed CVT Transmission
- variator with ramp plate
- 2 sets of 6 weights 19x15,5 mm (3,8 and 4,3 g)
- torque spring
- spring seat Evo Slider
- 1 tube of pulley grease
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 Hi Speed Evolution 2 D.14.8mm Piaggio Zip / Typhoon | |
|---|---|
| Article no. | U241.750 |
| EAN | 8054705116766 |
| Weight | 0,84 kg |
| Series | Hi-Speed |
| Brand | Polini |
| Product type | CVT |
| Range | Standard |
| Roller size | 19 x 15,5 mm |
| Roller weight | 3,8 gr, 4,3 gr |
