R. J.
Supporting Member
I figured that I'd start a new thread on temp cycle testing. Some time ago I mentioned that I was going to do it on another thread but thought it would be best if I done it in a seperate thread. A few members showed interest. The test was done at a ambient temperature of @ 78*F. Engine idle @ 1140 RPMs. All temperatures are measured in fahrenheit. Test equipment used (#1) CRAFTSMAN MULTIMETER set to fahreneit using a single lead thermo-wire. (#2) CEN-TECK Infrared Thermometer also set to fahrenteit. Calibration was done at 32*F & 212*F. Accuracy on both pieces of test equipment is +/- 3*F. (NOTE) The @ symbol = approximately. * symbol = deg. F. (NOTE) Temps differ a few *F because of rapidly rising temps before pics could be taken. Pic # 1. Ambient Temp. 
78*F. Pic #2 to 4. Temp after @ 3 to 4 min. after engine warms up. 
@ 160* F. Pic #5 to 7. Bikes fan comes on while engine is running.
@ 230*F. Pic # 8 to 10. While engine is running lowest temp measured when bikes fan comes on after the key is turned off.
@ 220*F. (NOTE) CEN-TECK readings was taken at the point of the outside of the thermostat housing. CRAFTSMAN thremo lead readings are taken from the inside of thermosat housing with radiator cap on. Also the bikes DAYTONA METERS temp gauge's sensor switch is inside the thermostat housing. The tachs dummy light is disabled. Left side of engine cyn while bike is running & fan is on.
@ 195*F. Left side of valve cover while bike is running & fan on.
@ 181*F. Left lower engine case while bike is running & fan on.
@ 166*F. I used my 2 gal lawn mower test tank while doing these temp cycles.
I lost some coolant while doing this test do to the thremocouple wire being between the thremostat housing & the radiator cap. This test took @ 1 hour & 3 beers.
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. I used to do all kinds of Temp testing for G. E. Areospace/Lockheed Martin back in the 80s & 90s using multimillion dollar test equipment on multimillion dollar weapons of mass destruction.