You boys got me thinking about the temperature thing with the last few posts on here.
My motors are flying, and they sure aren't running rich - sooooo I deduced the reasonably expensive and supposed decent quality temp gauge I keep in my tool box for running in motors and taking the odd "reference temperature" with just might be telling lies.
I boiled a jug of water in a glass sided electric jug, and then temped the water through the glass while it was boiling (at 100 deg C, as water does very consistantly). Three readings all of 80 deg C ?????
So when my motor is hauling butt and I temp it at the end of a 7 min heat, as I occasionally do, more out of interest than anything else, and it reads 110 deg C, it is actually more like 130 deg C if my jug experiment is anything to go by.

Now - there is a classic example of why you don't tune to a set temperature with a temp gauge (yours or someone elses). They are just not accurate enough (unless you have a super duper certified industrial unit or something). If I had gone out and re tuned my motors to run at the 135 deg to 140 deg in Massives post with my temp gauge, I would have toasted my motors. Turns out they are not far off that mark, which makes sense if they are performing as they do.
Tune using performance, sound and smoke as your guides - then you will be safe, and get good performance and longevity out of your motor.
Anyone in the market for a cheap temp gauge. In good condition with minimal use