Polini is the first manufacturer to offer a complete variomatic kit for the 250-300cc Quasar engines with its Evolution High Speed series. The 10% harder counter-pressure spring together with the Kevlar reinforced drive belt, also included in the kit, offers always a full feed without slippage even on tuned engines. With a length of 822mm (series = 835mm) and the modified taper angles of the two halves of the pulley, the Polini set is the only one able to improve both the acceleration and the maximum final speed without the belt touching the motor body*. The Vario can open fully on the Polini set and offers a much wider working range.
Included are:
- Variomatic incl. bush
- Weights: 20x17mm (17Gr.)
- Vario incl. pulley Sliding shoes
- pulley
- counter pressure spring
- Kevlar V-belt (822x21mm)
*TIP: The distance between the V-belt and motor housing is very narrow when the Vario is fully extended. Models before the facelift 2014 may therefore show traces of contact in this area even with original components (V-belt, Vario). The V-belt can damage the oil pan seal. This can be remedied by removing the belt pulleys with a thicker spacer (item 7670209). Models from 2014 onwards have a recess in the critical area of the oil pan. The poliniset solves this problem and can be used on all models without modifications.
NOTE: The drive train of the Piaggio Quasar engines (as installed in the Vespa GTS models for example) tends to rattle when idling. Under certain load conditions, the V-belt will slap lightly on the guide roller. Piaggio has positioned the guide roller exactly for this reason, to prevent the upper and lower runs of the V-belt from touching each other. Many new vehicles make this noticeable, but harmless noise.
After mounting a Sportvario from Polini (P241719) or BGM (BGM2311V2), both of which work with a modified V-belt and therefore a slightly steeper angle of the belt run, a slight noise may also occur when idling or under low load. The noises are technically completely uncritical and do not represent a defect.
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