I have two out of 3 intake ports that are black. Is this an indication of leaky valve seats or valve seals?
carbon in intake ports
Posted October 20, 2013 - 12:49 PM
a small amount of seat leakage can cause that, if it runs good and the valve clearances are staying good i wouldn't worry too much.
Posted October 20, 2013 - 04:43 PM
I changed my valve seats around 6 months ago, and now my head has no deposit at all. But I wouldn't be too worried. Did you ever open up you head lately? Valve seals only costed me like 50$ or something like that at my dealer, for all five.
Posted October 20, 2013 - 05:39 PM
I've owned the bike for 3 years and haven't had the head off. It runs fine, but it is 15 years old. Did the seats or seals run you 50?