Engine Overheat Issues

[Ebeard4]

@SupraSabre Helpful pic! I’ll bet that was a bit of a mess. How many miles on that particular bike?

@Igofar Just arrived home, Sir. Plan to take the ST on the road early tomorrow, check temps and report…

Appreciate y’all’s input so far!

 

[Ebeard4]

Morning!
Took the bike out for a bit before work:
Ambient temp was 48°
(Following temps measured with IR gun, facing front of bike, on top left and top right) Distance/Speed/TempBars/TopLeft/TopRight
- Idle temp after 6 min warm-up: 0/0/3/252/108
- .5mi/45mph/5/122/241
- 2.5mi/60mph/5/230/235

Though I didn’t get to go too far, hopefully this is enough information. Looking at these facts based on what you all have said is making me think it’s an electrical issue, indeed!

 

[SupraSabre]

@SupraSabre Helpful pic! I’ll bet that was a bit of a mess. How many miles on that particular bike?

@Igofar Just arrived home, Sir. Plan to take the ST on the road early tomorrow, check temps and report…

Appreciate y’all’s input so far!

That engine had 74K on it. I know there was some work done it at some point, I know that the clutch in it had to have been replaced, but came out toasted. But cop bikes were treated pretty hard, even with low mileage.

 

[RVtraveler48]

Sure sounds like a stuck thermostat.... but since you replaced, can you hear the fans kick on? let it idle for a while until they come on.

I have had my ST for 15 years and for the first time, after a stretch at 50mph, stopped at a light and the temperature began climbing. It does have a minor coolant leak somewhere never located, and I carry some extra antifreeze, but I'm thinking that since the temperature came down as soon as I started moving I am suspecting the relay that turns the fans on. It happened again on my ride back - as soon as I came onto the RV campground in 2nd gear the 4th led lit up but 50 yards later when I stopped the fans were running. I'm thinking they are intermittent - does anyone know the location of whatever tells the fans to come on?