Has this been a problem with 2008 rzr 800 models? Tear down due to excessive oil consumption and found this on the front cylinder exhaust valve. The lifter was still together when I removed but the spring clip was no where to be found. I looked into the crank shaft area carefully while rotating and see no loose pieces. Only 1 lifter like this. Others are fine. Just wondering if others have seen this problem because Polaris oem part was revised.
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