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Stage6 R/T Oversize Variator Kit - Piaggio


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Oversize variator kit from Stage6 - the optimal complement to the Stage6 oversize torque driver.
Bigger CVT systems are becoming essential parts for race and midrace engines, extending the whole range of transmission.

The Stage6 R/T variator has revised roller curves that have been optimised for usage with R/T engines and accommodate weights in a size of 19 x 15.5mm. The result is a very homogenous rev characteristic that effects the complete acceleration phase.
The precise surface angles have been achieved using CNC technology and the surface has been treated with a ceramic conversion coating, which prolongs the surface structure and roughness. Shot-peening, as it is done with pure aluminium pulleys, is therefore not necessary.

The centre area of the ramp plate has been reinforced and the sintered guide piece offers optimal lubricating properties.

Also included with the kit are the outer half of the pulley with fan and a set of weights and the fitting Stage6 R/T torque spring. Special fitting tools are also available from Stage6.

This oversize variator can be used with good effect with the standard torque driver, but to unleash its full potential, it should however be used in conjunction with the oversize torque driver and the oversize drive belt.

An oversize belt is only required when also using the oversize torque driver.

A set of 19x15.5mm (3.5g) rollers is included.

Stage6 S6-5614039

  • Aprilia SR50R '03 onwards (Piaggio engine)
  • Derbi GP1 (01-05)
  • Piaggio/Gilera 50cc 2-stroke scooters (air cooled)
  • Piaggio/Gilera 50cc 2-stroke scooters (liquid cooled)
  • Q. I have this kit for my ped, but can I use the starter motor now as it doesn't seem to let me fit the teeth gear on ?
  • A.

    No, you will no longer be able to use the electric start with this kit. Because it would normally be used on high end race bikes which don't use the electric start the R/T kit includes a light weight CNC machined front pulley which doesn't have the teeth on the outside for the starter bendix. So you will only be able to use the kickstart with that variator fitted.

  • Q. I'm confused, can this 'oversize' variator kit be used on its own or only as a spare variator for the complete oversize variator kit sold here?
  • A.

    The Stage6 oversize variator kit can be used on it's own with a standard belt and it works very well.

    It holds the revs more steadily than the regular Sport Pro Stage6 variator (which already works very well) but be aware it is happiest revving high (something like a high revving sport or mid-race cylinder kit upwards), although probably anything 10,000rpm upwards would be fine.

    If you fit the complete kit with the different rear end and belt it has the further advantage of a stronger thicker wider belt, with lighter stronger torque assembly optimised for and capable of withstanding high end hi-revving race cylinders etc..
    Because it is 'oversize' you also get the advantage that it can hold the revs steady over a wider speed range (=higher top speed) because the belt has a larger range of movement up and down the cones.
    So say for example you have a gearup kit, a standard variator might be able hold the revs steady up to say 50 mph (actual speed depends on many factors!) after which the belt is moved all the way out and the only way the bike can then go faster is if the revs increase (effectively becomes a fixed gear bike like a geared motorbike). An oversize kit (as opposed to just the variator) would allow it to hold the revs steady up to say 54 or 55mph in the previous example.