Originally Posted by grizz1

The simple answer is "don't worry about the temperature".
There are so many variables in what temp an engine runs at - fuel type, plug type, pipe, ambient temp, height above sea level, track conditions etc, etc.
If it's running well and making good power with good smoke right through the rev range then it's a happy motor - the temp is irrelevant. Some engines will run best a little cooler, and some will run much warmer. Don't compare temps and tune to someone elses motor. Most times your tune will be off doing this.
Massive Mods has the best advice for temp gun use. His answer will be to hit it very hard with a hammer, then tune by sight, sound and performance. It's good advice.