Polini Variator Hi-Speed Evolution d.16mm / 12.5° Minarelli horizontal (Yamaha Aerox / China 2-stroke)
Description
Scooter tuning made in Italy: Polini Variator Hi-Speed Evolution d.16mm – 12.5° Minarelli horizontal (Yamaha Aerox / China-based 2-stroke), including spring, spring seat, pulley and shims.
Polini introduced their outstanding P.R.E. racing kit (Polini Racing Engine), and this is the Polini Hi Speed Evolution 12.5° CVT to go with it. Pulley angles were redesigned (12.5°) to improve acceleration, especially in tuned engines, the surfaces are polished, lubrication and coating of the 16mm variator sleeve is also improved, and the roller weight material is even more resistant to wear.
We recommend to use an oversize torque drive and a matching drive belt.
Including:
- variator with ramp plate and pulley
- 2x 6 roller weights 19x15.5mm (3.2g and 3.8g)
- reinforced torque spring Evo Slider + 8%
- spring seat Evo Slider
- 16mm variator sleeve (oversize)
- set of shims + nut
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 ?
Polini Variator Hi-Speed Evolution d.16mm / 12.5° Minarelli horizontal (Yamaha Aerox / China 2-stroke) | |
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Article no. | U241.740 |
Weight | 0,40 kg |
Series | Evolution |
Brand | Polini |
Product type | CVT |
Range | Oversize |
Roller size | 19 x 15,5 mm |
Roller weight | 3,2 gr, 3,8 gr |