Description
Polini Variator Hi-Speed Evolution 2 Piaggio NRG / Typhoon, tuning variator by renowned Italian manufacturer Polini. As it was developed to be used with the original torque drive, it has to be used with a standard (preferably reinforced) drive belt. Pulley angles were designed to improve acceleration (compared to stock variator).
This is the EVO 2, the further developed and improved version of the already very powerful 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.
Included:
- variator with ramp plate
- 2 sets of 6 weights 19x15,5 mm (3.8 and4.3 g)
- torque spring with Evo Slider
- 1 tube of pulley grease
Note: Variator sleeve is 16mm, that means that it can only be used with 16mm crankshafts (smooth spline).
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. 16mm Piaggio Zip / Typhoon | |
|---|---|
| Article no. | U241.751 |
| EAN | 8054705116773 |
| Weight | 0,46 kg |
| Series | Hi-Speed |
| Brand | Polini |
| Product type | CVT |
| Roller size | 19 x 15,5 mm |
