Why is coolant coming from the overflow pipe

[motolink]

300km to day and no problems, it was a reasonably hot day too. I think when I took the radiator cap off to clean it was not turned all the way on which would mean the right pressure may not have been on the reliefe valve. I thnk this because the lock bolt in the cap seems to be further forward than when I loosened it to take the cap off.

 

[GPMAZ]

Cap failures seem to be a pretty common issue. I carry a new one in a saddlebag, that way mine will never fail.

 

[dougl]

If you're talking about the overflow tube under the bike, this happened to me 7 years ago and the problem was the radiator cap. if it doesn't vent properly, you get vapor lock and when it cools down, liquid spurts into the line.

 

[motolink]

All the evidence points to the cap, the coolant does not start to come out of the overflow pipe at back of the motor until a few minutes after turning the motor off.