Polaris
Polaris 800 CFI Low Compression
Have a Polaris 800 CFI snowmobile? Be sure you do a compression check! These motors have quite a bit of rod angle and are known to wear out rings & pistons fast! Your motor should have at 125 psi of compression (make sure you hold the throttle wide open!) on a known good gauge. We have seen many sleds around the 2000 mile mark with low compression that do not make peak power. If you are around this milage keep an eye on your tach as this is a good indication of a weak motor. A motor low on compression will be a few hundred rpm short of peak rpm.