compresion

[sks1]

Just wondering if anyone would know what the compression on a sportsman 400 polaris quad would be.

 

[munhoez]

over 100 psi for sure, anything else is a rebuild. Four stroke hold the throttle wide open, 2 smoke just crank, no throttle.

 

[OnlyPolaris]

50-90 psi as per polaris service manual.

 

[youngpolarisguy]

Polaris has a auto decomp in the cam comp readings will be low like said 50 to 90 will be good my old 500 was about 75psi and it ran perfect.