[jak2136]

Just got done with a maybe hour long ride that ended with a little stop and go traffic that got temps up to 220. I turned off the bike a few minutes after the stop and go traffic and noticed a few ounces of what appears to be coolant coming from a little hose towards the bottom of the bike that I assume is an overflow. Is this normal?

 

[sdg24]

Hard to tell by those photos. You’ll need to take the fairing off to be sure. But if memory serves, I think that’s where the overflow tube is so you might be right.

having said that, 220 shouldn’t cause coolant (at least not that much) to come out the overflow. The only reason I can think of would be if you had recent work done and they overfilled the expansion tank.

I say, take the fairing off and see where it’s coming from. You should see some residue as you follow the path of the coolant. Send a new picture if you get stuck.

 

[Profess_EMS]

I have had the same problem on 2 separate occasions with my bike, which is for track use only. In both cases, it was due to a failure of the radiator cap (not the plastic expansion tank cap). If it fails, it causes overflow through the tube regardless of expansion tank level or running temperature. Replacing the cap ($15) fixed it both times. Good luck!