So I pulled my motor today. I'm going to do a leak down test. Yes I know I didn't need to pull the motor but I did for learning purposes. Anyways, I took a look inside the exhaust port at the piston and noticed it was a coffee color. The intake side however was not. Is it suppose to be that color? Or is it a burn mark from maybe running lean? Or is it just build up from the exhaust? And how do you clean out the carbon build up without getting it in the motor, without pulling the jug off? Thanks
