What does a lighter clutch spring do?
heavy springs raise rpms, light springs lower rpms. if you have too much spring you can reduce the spring rate, and or add weight the primary arms to reach the desired rpm range. if the if you have too weak of a spring, you can up the spring force, and or lighten the primary arms to reach the desired rpm range.
How does a secondary clutch work on a snowmobile?
The secondary clutch connects to the track drive, which turns the wheels and powers the tracks. A spring in the secondary clutch operates the cams (wedges), which are sensitive to torque. As the engine’s RPM increases and the primary transmits power, these cams squeeze together and tighten the belt.
What does a primary clutch spring do on a snowmobile?
The primary spring controls the downshift in the primary clutch, the force of the spring pushes the moveable out(towards the left side of the sled) when the clutch is downshifting, say when you let off the throttle.
What RPM should a snowmobile clutch engage?
Idle should be about 1000-1500, clutch should engage at 3500-3600rpm.
What is the primary clutch and secondary clutch?
The secondary clutch is a much larger diameter than the primary clutch and the belt wraps around the outside of the two sheaves, again one being fixed and one being movable. When the primary clutch begins to shift it forces the belt higher in the primary clutch.
What do clutch spring numbers mean?
The numbers have units of pounds per inch. That means a 170-300 needs 170 pounds of force to compress the spring the first inch, and another 170 pounds to compress it another inch (for a total of 2 inches compressed). The first number is the preload rate, the second number is the full shift out.
What do secondary clutch springs do?
The primary clutch spring changes the engagement rpm. The secondary clutch spring changes the up and back shift speed by spring stiffness.