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Article no.: S6-5616615

Rear Pulley Stage6 R/T Oversize Torque Boost Minarelli

Name: Rear Pulley Stage6 R/T Oversize Torque Boost Minarelli
Brand: Stage6 R/T
SKU: S6-5616615
Price: 365 EUR
Availability: InStock
Rating: 4.81 (16 reviews)

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Description

Oversize torque driver Stage6 R/T

Stage6 R/T Torque Driver Assembly Oversize Torque Boost Minarelli for use with Stage6 R/T Oversize CVT as well as other oversize CVTs.

Design Stage6 R/T rear pulley

Unlike conventional steel torque drivers, the Oversize CVT torque driver consists of forged aluminum pulley halves and an interchangeable torque driver guide with two angles. This option is a first for a torque driver and opens up entirely new possibilities.

The pulley halves are CNC-machined before assembly to improve component precision, particularly the pulley face angle. Particular attention goes to surface roughness, as this has a significant effect on the torque driver's shifting and backshifting behavior. Finally, a deep ceramic coating protects the surface to preserve these properties for as long as possible.

Note: The torque driver comes "dry" and must be greased before installation.

Stage6 pulley - Modular Design

Various replacement parts and additional components turn the torque driver into a comprehensive modular assembly. Both the torque driver guide and the pulley halves can be replaced to suit individual needs. Further benefits of the modular design include reduced heat buildup, significantly lower weight and the ability to replace individual components when worn.

3x guide bushes
One of the stand-out features is the possibility to switch out the torque driver guide. The guide bushing included with the pulley has 2 different slots (38° and 41°) for adjusting pulley opening angle. Other guide pieces with 39°/42° or 37°/40° angles are also available; replacing the guides is easy (screw-on). This way you can opt for a different guide bushing with different slots for different pulley opening angles and speed.
3x pulley types
The pulleys are available in different versions / with different coatings: rough surface / ceramic coating; smooth surface / ceramic coating; smooth surface / uncoated. The additionally available versions can easily be mounted instead of the pulleys that come with the torque driver to optimize the grip of the V-belt and overall performance.

Important note: The oversize rear pulley (torque driver) only makes sense when used with an oversize front pulley (variator) and an oversize drive belt. Stage6 recommends the R/T variator and R/T drive belt, but the torque driver can also be combined with products from other manufacturers.

info Stage6 R/T torque drive for Minarelli scooters

Supplied with rough-surface, ceramic-coated torque driver pulleys
Must be used with an oversize drive belt
Supplied with a 38°/41° torque driver guide
OVERSIZE torque driver
Supplied without grease

Questions about the product

Downloads and Media

Installation guide

Manufacturer's Details

Stage6 GmbH

Eschberger Weg 43

66121 Saarbrücken

Germany

+49 6805 / 2063388

info@stage6-racing.com

https://stage6-racing.com/

Notes and Safety

rear pulley

The torque drive, also called secondary or driven pulley, is an integral part of the automatic transmission on scooters. It is the counterpart to the variator or front pulley and forms the rear drive unit. The rear pulley is located at the rear of the CVT housing and forms a unit with the clutch. As with the front pulley, there are also tuning versions of the rear pulley.

Working of a CVT transmission

The front and rear pulley (variator and torque driver) work together and are interdependent. At idle, the V-belt rides on its highest position on the rear pulley and on its lowest position on the front pulley. When you accelerate and engine speed increases, the drive pulley in front turns faster and faster. The centrifugal force pushes the variator weights outwards, opening the front pulley. This opening forces the V-belt to move further and further away from the axle shaft. As the belt cannot be stretched and is under tension, it has to move inwards on the opposite side of the CVT.

This increases the speed of the wheel and the scooter becomes faster. As soon as the V-belt has reached its maximum position on the front pulley and its lowest position in the rear pulley, the maximum drive ratio is reached. Now the scooter can reach maximum speed until the maximum gear ratio is reached.

When braking, the variator in front opens and the torque drive at the rear closes. The contra spring assists the closing movement of the driven pulley so that the V-belt returns to its original position.

Tuning torque driver

The performance of the torque drive depends heavily on the torque spring. In addition to the pitch and surface finishing, which can affect the speed of the belt movement, the hardness of the contra spring must be adapted to the engine power. In general, the more powerful the engine, the harder the spring.

Oversize torque drives are also available, usually as part of a complete drive kit with oversize front pulley and matching V-belt, which increase the working range of the drive ratio.

The highest quality torque converters offer various improvements - anti-wear treatment, reinforced bearings, special coating for more grip, guide bushes with different angles, improved heat dissipation ...., i.e. even more fine-tuning and options. The finer the adjustment and the better it is matched to the setup, the higher the performance.