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Polini
Article no.: U241.672

CVT Variator Polini Hi-Speed Piaggio NRG / Stalker (after 1998)

65,00 €

incl. tax, plus shipping

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Description

Polini Variator "Maxi Hi-Speed" Piaggio NRG / Runner after 1998 (19x15.5mm - 6.3g rollers).

Polini variator equipped with 19x15,5mm roller weights, reinforced torque spring is included.

As it was developed to be used with the original torque drive, it has a "small" outside diameter and has to be used with a standard (preferably reinforced) drive belt. The angles of mobile pulley and ramp plate were designed to improve acceleration.

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Notes and Safety

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 ?

Technical details
CVT Variator Polini Hi-Speed Piaggio NRG / Stalker (after 1998)
Article no.U241.672
EAN8054705075018
Weight0,70 kg
SeriesHi-Speed
BrandPolini
Product typeCVT
RangeStandard
Roller size19 x 15,5 mm
Roller weight6,3 gr
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