Is it best to dyno a bike in hot weather colder weather 40s or does it make difference.

 

Your bike will make good numbers in the cold for sure. I had mine dynoed in the cold. Sure doesn't run as crisp or well in the heat.

I suspect if it was tuned in the heat it would run better in the heat. But any air cooled motor is going to lose some performance in hot weather...

 

I've heard that it should be tuned on a dyno between 60 and 80 degrees. that way the engine will be fully warmed up, but not overly hot to where damage could be done. If you just want a dyno sheet for your bike make sure you trust the operator and follow his suggestions.

 

Being in Texas, I sure wouldn't have it on the dyno in the summer. I've heard horror stories of people frying their motor

 

I had mine dyno'd when cold and when things heated up in the summer the motor pinged like crazy. It was running 10.5/1 compression.

 

Every dyno machine that i've seen is inside in a controlled environment. I'm no expert here but this would lead me to believe it doesn't matter.

 

I agree.

 

Cold, dense, dry air makes for big dyno numbers.

 

The dyno corrects the output to the SAE standard temperature anyhow. So the only problem with dynoing at high temperatures is the engine overheating.