Just notice my coolant resouvior is filled with black fluid. Is this oil mixing with coolant? 2005 1300R with 18000miles? It was laid down on right side for a minute, would that be the cause? Thanks again. Jay (newbie)
When was the last time you looked at that reserve tank? No, your coolant wouldn't be jet black with a little oil added, it would be a milky brown color. So would your engine oil so look there first. Just dropping a bike over usually doesn't do anything except embarrass the owner. You can pick them up and ride them away without worry and many thousands do so every day. My guess is that the reserve was that color before and you just noticed it now.
When was the last time you changed the coolant. Good time to pull the tank after the engine is cool and look at the coolant. Maybe it needs to be changed?? Some people do not change out the reservoir tank when they change the radiator coolant out because it requires a little more work. Should be changed every couple of years.