Help, please! Engine overheating 🥵

[imcool]

No, and I feel extremely confident that has nothing to do with it. I've been running Zerex G05 for over 20,000 miles. This first happened many many miles ago (10-15K) and just came up again for the first time since then.

Update- TuneEcu shows the P0117 Coolant Temperature Sensor code. I cleared it and (for now, anyway) no more overheating based on a neighborhood hoodlum run. Either that sensor is "tempermental," or my other theory about an air pocket moving into the system because the overflow tank was so low is correct. I figure someone like @TURBO200R4 might be able to confirm or shoot that idea down.

would you know, how long OEM coolant last if the can / jug is not opened?
I have 1 gallon sitting with for 2+ years

 

[Journeyman]

would you know, how long OEM coolant last if the can / jug is not opened?
I have 1 gallon sitting with for 2+ years

I don't- sorry.

 

[Journeyman]

on mine i run it very low in the over flow tank because it blows most of the fluid out. now if the system is not leaking then you could run it empty and not have a problem as long as the radiator was full.
i suspect that you have a leak or your fan is not working. you can use your tuneecu to trigger the fan or le t it idle for a while to see if it comes on.
its easy to check fuse somes some times they (fuses) just give up the goat and burn out..
i now run a small tank bolted to my crash bar and it stays about 1/3 full.
a friend of mine call and was stuck about 50 miles away with the heat light on because he was in a road work area so he got off the main road and after thing a while i advised him to turn around and head back to tucson thinking he would be ok when he got back up to speed
so made it back and he found a blown fan fuse. may have been bad for a long time the construction zone caused the bike to heat up.
hth
problems could be bad fuse,leaking rad sys,bad temperature sending unit,bad wires, bad fan motor,
if you need help just sing out.

All good ideas, but I was just 2 miles from home, so not a situation on a hot day or long idle. The fan came on when I got it back home and reset the code.

I could have under-filled the radiator overflow when doing the 40k service. I don't think I have a leak (time will tell).

Sounding most likely that it's a bad temp sensor (pretty sure @Nashvegas had that issue) that is working intermittently.

 

[Nashvegas]

No, and I feel extremely confident that has nothing to do with it. I've been running Zerex G05 for over 20,000 miles. This first happened many many miles ago (10-15K) and just came up again for the first time since then.

Update- TuneEcu shows the P0117 Coolant Temperature Sensor code. I cleared it and (for now, anyway) no more overheating based on a neighborhood hoodlum run. Either that sensor is "tempermental," or my other theory about an air pocket moving into the system because the overflow tank was so low is correct. I figure someone like @TURBO200R4 might be able to confirm or shoot that idea down.

Yep, “temperamental“ is exactly what it was. It didn’t matter what my coolant level was at the time. It would manifest itself when I got in traffic or start/stop in a small town. Open road was fine. Start it up, turn it off, start it up, turn it off, and it would sometimes start working again. It drove me nuts tracking it down. It is a little finned rectangular module right above the oil filter. Center/left if you are looking at the engine from the front. Kind of a pain to get to, but you have bled your clutch before so it should be no problem for you. I can get you the part number if you need it. But you will recognize it in a schematic. Has been working like a champ for a couple of years now.