Originally Posted by BusyLittleShop
Oil turning "brown
Dan... oil turning brown after a few miles could be moisture contamination... Leaky Head Gasket Check... You can visual inspect for a leaking head gasket by pulling the spark plugs and peering down each hole... if the top of the piston is black then no leak that cylinder... if the top of the piston is a bright shiny aluminum then leak detected... because a leaky head gasket allows coolant in and that produces steam under the heat of combustion... the net effect is a super clean piston dome and no nasty black...
Originally Posted by dgunay
After few miles, new oil was dark brown. Is this a normal thing with wet clutch motorcycles?
Thanks for the input guys, I've checked reservoir level when it's cold. It is in between the middle and low mark. When it was brand new 2 years ago, it was just a bit below the middle mark. I've never added coolant. Does that mean that there is a coolant leak, or just evaporation at 6.5k miles? I have an aftermarket exhaust with no cat, and I didn't see any white smoke coming out of it. I have plenty of Honda blue coolant which I can top it off if it goes down to low mark, but I really don't think it is going to happen anytime soon.
Originally Posted by ZeeOSix
An easier way to check for coolant leaks is to watch the coolant reservoir tank level closely - ie, check when completely cold to get a consistent level reading..