Doctor Pulley Variator Sliding Weights 21 x 17, 9.5g-13.0g

Dr. Pulley Variator Sliding Weights 21 x 17

Expect better performance from your scooter with this simple power upgrade.

Dr. Pulley roller weights are the most advanced weights available. These sliding rollers perform better than standard round weights by allowing the variator to close tighter so the belt can ride higher for a improved top speed.

The weights also have several unique features such as their composite material containing nylon for better performance and durability.

Available in the following weights:

For 250cc/300cc Piaggio/Vespas:
9.5g *
10.0g *
10.5g Best weight for GTS 250*
12.5g Best weight for GTS 300*
13.0g

These Sliding weights feature:
*Improved Acceleration
*Highest Top Speed
*Extended Gear Ratio Range
*Most Stable Gear Ratio

Do not combine these with a Malossi belt. There have been rare instances of these causing the belt to rub on the engine case due to the extended gear range.

* These are lighter than stock and can cause the belt to ride too high rubbing the engine case and the hitting the rev-limiter (cutting power to the motor). We recommend installing an extra spacer washer between the two front variator halves (see part number 434885).