Variator-Kit -POLINI Evolution High-Speed-Kit - 250-310 Quasar/HPE - GTS 250-310, GTV 300-310, Royal Alloy GP 300, TG 300, Italjet Dragster 300

Polini Evolution Vario Kit for Quasar Engines

Polini is the first manufacturer to offer a complete variator kit for the 250–300cc Quasar engines with their Evolution High Speed series. The 10% stiffer torque spring, combined with the Kevlar-reinforced drive belt included in the kit, ensures strong propulsion without slip – even on tuned engines.

More speed & torque without case contact

A key feature of this kit is the significantly shorter drive belt.
With a length of 822 mm (stock = 835 mm) and altered pulley angles, the Polini kit is the only one capable of significantly improving both acceleration and top speed – without the belt touching the engine casing*. The variator in the Polini kit opens fully, offering a much wider operating range.

Included:

• Variator incl. bushing
• Rollers: 20x17mm (17g)
• Ramp plate incl. sliders
• Drive face
• Torque spring
• Kevlar drive belt (822x21mm)

*Tip: The distance between the belt and the engine case is very tight when the variator is fully opened. On pre-2014 models, contact marks may occur even with OEM components (belt, variator). This can damage the oil pan gasket. A thicker spacer washer (item 7670209) between the drive faces provides a remedy. From 2014 onwards, the oil pan features a recess in this critical area. The Polini kit solves this issue and fits all models without modification.

NOTE: The Piaggio Quasar drive system (as used in Vespa GTS models, for example) tends to produce rattling noises at idle. In certain load conditions, the drive belt may lightly touch the guide roller. Piaggio intentionally positioned it this way to prevent the upper and lower belt runs from contacting each other. Many new vehicles make this noticeable but harmless noise.

After installing a Polini (P241719) or BGM (BGM2311V2) sport variator, both of which use modified belts and a steeper belt angle, light noise under idle or low load may also occur. These sounds are technically harmless and not a defect.