What rpm should snowmobile clutch engage?
What rpm should snowmobile clutch engage?
Idle should be about 1000-1500, clutch should engage at 3500-3600rpm.
What do different color clutch springs mean?
The color of the clutch springs indicates roughly at what rpm they should engage (or the stiffness of the spring). Depending on the manufacturer the white is the softest (will engage at the lowest rpm), red the stiffest (will engage a higher rpm), and yellow and blue somewhere in between.
What does the primary clutch spring do?
The job of the primary spring is to keep the clutch from engaging(making the sled move forward) until the motor has reached a specific RPM. The primary spring also controls peak RPM to an extent.
What do clutch spring numbers mean?
The first number is the preload rate, the second number is the full shift out. The higher the number, the higher the RPMs the motor turns. Say you have the 170-300 spring, and your engagement speed is 3500 RPMs, and your max RPM is 8000.
What is a snowmobile supposed to idle at?
1500-1700 rpm for idle is pretty normal when fully warmed up. Don’t worry about the high idle down syndrome…its normal. For mostly drag racing on packed snow these sleds rip with an almond/gold spring and 62 weights in the primary.
What RPM should my snowmobile start moving?
How does a clutch spring work?
The springs mounted on the inner hub of the clutch plate cushion the clutch engagement. They work as a torsional vibration damper to absorb fluctuations in the engine’s power delivery. As the springs work as dampers the power delivery is smoother and more linear than if there were no springs.
What kind of Springs does a Polaris snowmobile use?
The springs are used to enhance the performance of a snowmobile. Polaris sells primary clutch springs and secondary clutch springs. 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.
What happens when you change the spring on a Polaris clutch?
Changing out the spring for a different one makes big changes to your clutch’s behavior. Too stiff and your clutch stays open too long, which means your RPMs will be over the optimal range before you even start moving. Too soft and your clutch will close quickly, so you might never hit the optimal RPM range at all.
How are the springs in a snowmobile clutch rated?
The secondary clutch springs are color coded to rate degrees in softness, from a soft 1 to a firm 7. Adjusting the tension and firmness of the springs in a clutch will affect the upshift and backshift capabilities of a snowmobile.
How do you close the clutch on a snowmobile?
This changes the engagement RPM, but should not change the full shift out RPM. The flyweights are responsible for closing the clutch by pushing against the preset spring pressure. By raising the engine RPM with the throttle, you raise the force of the flyweights pressing against the spring.
Changing out the spring for a different one makes big changes to your clutch’s behavior. Too stiff and your clutch stays open too long, which means your RPMs will be over the optimal range before you even start moving. Too soft and your clutch will close quickly, so you might never hit the optimal RPM range at all.
What’s the belt side clearance on a Polaris clutch?
Belt side clearance on new Polaris clutches comes out of spec by Polaris standards when using the 115 belt. Polaris has spec’d .005 to .035 belt side clearance. My clutch came at .051 & the BB weights have a looser bushing increasing an already out of spec clutch to about .061.
Do you need a secondary spring on a Polaris snowmobile?
No you don’t have the team secondary, it is stock on newer polaris’s but is an aftermarket option. If your primary clutch has all stock components, and you have a 34 degree helix, I would go back to the stock “red” secondary spring with one .030 shim between the clutch sheaves (unless you don’t have a problem with the yellow spring).
What kind of spring do I need for a snowmobile clutch?
If your primary clutch has all stock components, and you have a 34 degree helix, I would go back to the stock “red” secondary spring with one .030 shim between the clutch sheaves (unless you don’t have a problem with the yellow spring). On the helix you should have 4 hole option for the spring to fit into.
