Clutches Overview; Relationship Of Drive Clutch Weights And Spring In Maintaining Operating Rpm - Polaris Magnum 2x4 Service Manual

Polaris atv and light utility vehicle service manual

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Relationship of Drive Clutch Weights and Spring in Maintaining Operating RPM

The drive clutch is an

and torque sensing unit designed to transfer the maximum amount of horsepower

from the engine to the ground. This is accomplished through weights and a spring inside the unit which react to

the centrifugal force applied to the clutch from the engine

The spring and weights work in combination. In a properly set up clutch, the maximum desired operating

will be reached immediately after clutch engagement, under full throttle conditions. To gain optimum power this

should be maintained. As centrifugal force pushes the weights against the rollers, the moveable sheave

will force the belt to climb up the drive clutch sheave and increase vehicle speed.

If the weights and spring are matched

properly, the engine

will go to the

Example: Engine Operating RPM 6000 ±200

desired range and remain there on both

the upshift and backshift.

8000 - - - - - - - - - - - - - - -

If the weights are too light, or the spring

rate too high, the maximum

too great and the drive belt will not move

into high gear at the top of the clutch.

If the weights are too heavy, or the spring

rate too low, the engine

and the drive clutch will upshift too fast,

keeping the engine out of its power

Polaris Industries Inc.

8000------------------------

::E 700Q.. ___ _

6000------~-----------------

5000----~-------------------

3000----~------------------

2000----~-------------------

1000--------------------------

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