The product relates to SCOOTERS that use a J.COSTA variator. It is not compatible with any other variator. The product relates to SCOOTERS that use a J.COSTA variator. It is not compatible with any other variator. SUGGESTION 1 Heavier than specified. A PARTIAL INCREASE IN TOP SPEED (Suggested for scooters with increased capacity, for riding at lower revs) SUGGESTION 2 The same weight as specified. NORMAL BEHAVIOUR - MAINTENANCE (Suggested for scooters with wear on the rollers already in use) SUGGESTION 3 Half the rollers the same weight as specified and half lighter, fitting them alternately inside the variator. SPORT RIDING (Suggested for knowledgeable riders) SUGGESTION 4 Lighter than the specified weight. RACING RIDING - MORE ACCELERATION (Suggested for demanding riders) SUGGESTION 5 REPLACE THE WHOLE VARIATOR WITH A J.COSTA Scooters are built at the factory to change 3 automatic gears. The variator is the main reason that happens. malossi variators are designed to improve a scooter's performance in a simple way, with no bodges, and to change 5 gears instead of 3. They add one gear at the start and one at the end, making the action smoother.