What do the clutch spring colors mean?

The primary clutch springs are color coded to represent compression rates based on the number of pounds of force needed to compress the spring 2.5 inches and 1.19 inches. The secondary clutch springs are color coded to rate degrees in softness, from a soft 1 to a firm 7.

How do I choose a clutch spring?

It is recommended that you first upgrade your stock clutch springs to +1000 RPM (blue) springs as this gives better performance than stock springs without much of an increase in gas consumption. If the performance is still not up to your expectations you can try a stiffer set of springs such as the +1500 RPM (yellow).

What springs are used in clutches?

The diaphragm spring is made up of the ‘fingers’ at the centre of the pressure plate. With the clutch engaged they force the pressure plate onto the clutch plate, and the clutch plate onto the flywheel.

What does changing clutch springs do?

The clutch springs alter clutch engagement and disengagement. At that point the clutch and CVT are fully engaged and engine power can drive the scooter. Clutch springs provide resistance against the centrifugal force that causes the clutch shoes to move outward and engage with the clutch bell.

What are the different types of clutch springs?

Adjustments are determined by two sets of springs. The clutch comes with the base set installed- four sets of pillow springs and four sets of clutch springs. It also comes with a reinforced bell, three compression spring washers/spacers/shims and a clutch nut lock washer.

Is the Polini Maxi speed clutch spring preload?

The Polini Maxi Speed Clutch features the most straightforward spring preload adjustment of all our clutches, utilizing easily accessible bolts that run through a captured nut each the spring. This is the only clutch we carry that can be adjusted while installed.

What happens if your clutch engages too late?

If your clutch engages too late because the arms are too heavy and the spring preload is too high, you are starting too far away, and you will hit your top speed before you hit the blocking sled- meaning you are wasting time and energy to get off the line.

What should I look for in a clutch?

Some of the things you’ll want to look at in choosing a clutch are the weight, pad size and adjustability. A lighter weight clutch reduces rotational mass and the initial energy required to spin it. Bigger pads mean more contact with the clutch bell, which translate your engine’s power to your rear wheel.