I got a 2003 polaris sportsman 500.
I brought it recently then found out it was overheating. Mechanical thermostat wasnt working. I removed it. Doesnt seem to over heat.
I went to drain oil and it was a bit milky.
Coolant didn't have oil in it.
Did a compression check on engine ( cold ) and it was 80psi , i pulled the throttle and it went up to 140 psi.... i dont get how that is possible for a start ? In the past when i tested something it usually goes up 10psi more with throttle sort of thing.
should i pull the head off , any other tests i can do before i pull it off?