The main role in the development of a variomatic scooter is the weight. Empirical rule: lighter your rollers set, the most rpm is needed to push towards the outside roll through the centrifugal movement to set change change on the move. Heavier rollers must lower the RPM to start this process. This means that if your scooter is lighter Rotoli will need more rotation speeds to start moving. Heavier rollers allow you to start moving at low RPM. Each pilot will have to find out which level of laps is right for them. A series of factors much in this decision: the degree of development, the weight of the drivers, which weight (rolls) are optimal, etc. know the overabundance of inadequate material on the market, we can only recommend various rolls by renowned polini and malossi studies. Their products are made according to the most severe standards, they are of the highest quality and are durable - and still convenient! Here are the most common formats: engine type: minarelli 15x12, Morini 17x12/Kymco/Peugeot/Honda/Piaggio/Gilera -> `98 16x13, Piaggio/Gilera '98 -> 19x15, 5 Sport variers: Polini/Malossi 16x13, 15x12 Hebo Performance 17x12/Top Sip -Tip! By changing variator rollers, each scooter can be tuned exactly to its engine performance or driving conditions. What should be seen: the most aggressive your engine is tuned, the most sensitive that reacts to weight variations on the lists. Be careful not to work with weights that are too different! Remember: Vario is really necessary to really take place so that the Doesnt engine refuses its performance in the regime of useless rpm (too clear weight) or through changes of travel too early (too heavy weights), which do not get any acceleration.