Highway running Temp

[Doc X]

What should the engine oil temp be when running for 30min at 75mph with ambient temp of 85*?
My Tel -Tru read 235*.
Thanks,
Doc X

[sandy]

My Tel-Tru have never been above 225 and that's when pulling my 425lb tent trailer on a hot day in AZ. Usually it runs 200-210 under your conditions. You might remove it and compare it to another temp guage. Maybe it needs calibration.

[RP#62]

Mine pretty much matches Sandy's.  210° is typical at highway speeds.
-RP

[DFragn]

As mentioned it may need calibration

You can calibrate it in a pot of boiling water. Loosen the nut under the dial and slightly rotate dial to match boiling temp at your altitude. An easy rolling boil is good.

Calibration can be upset by using the dial to screw the dip stick in. Avoid using the dial. Use the stem instead and finger tight is good.

 Sea Level     212 degrees F

 984 ft.         210 degrees F

 2,000 ft.      208 degrees F

 3,000 ft.      206 degrees F

 5,000 ft.      203 degrees F

 7,500 ft.      198 degrees F

 10,000 ft.    194 degrees F

 20,000 ft.    178 degrees F

 26,000 ft.    168 degrees F - The death zone 

[Doc X]

I checked the Tel-TRU as suggested and it was right on. It has new radiator fluid ,Honda, I don't think the rad cap would cause the problem.
Any thoughts?
Doc X

[Farther]

My guess is that it is normal.  Get rid of the temp guage and you will be fine.

[Earl in Pensacola]

I have a "true-Temp" coolant gauge.  The sensor is located IN the middle of the upper radiator hose.  It reads the actually coolant temperture and that runs at 180 under just about all moving conditions.  sometimes, in 85 or higher ambient temps, it may run about 190. However, around town stop and go situations the temp. will go up to 212, then the fan comes on and seems to be able to get it back down to the 200.  As long as I'm in the stop and go stuff, the temp. cycles between 200 and 220, but will drop within a mile of getting moving again.  This is on a '97 Tourer with 221K on the clock with the Original radiator.  Just flush the radiator about every two years and use a good non-silicate
anti-freeze.

[john]

210 - 215       

[sandy]

Could it be that you are running too lean in the carb setup? This might cause overheating.

[Jess from VA]

IF you decide to flush & change coolant, add a dose (few ounces) of "Water Wetter" to your coolant/water mix.  This should drop your avg temps around 10 degrees.

Finger tight on the TelTru may be good to keep it secure in the bike, but it makes it easy for some sh!thead to steal.  I use a mini crescent to snug it just beyond finger tight.