I had my motor rebuilt ,and changed some stuff in the motor , I didn't want to tune it until I got it broke in , so here it is winter, and I am wondering if it will make a difference in the tune to have it done when it is cold or should I wait until it is warmer?
The dyno room at the dealer is not heated, so I would think that the tune would be off, or less than optimum, am I wrong?

 

It will be plenty heated up with your bike running in that room. Don't worry about the temp.

 

High ambient temps are worse than lower temps. That's why they make "cold air induction systems" for cars. High humidity is not optimal either. Cool, dry air is what is best.

 

We tune all winter long with no problems. you'll be fine.

 

Just got my bike tuned at JD's yesterday. Run conditions were 52 deg. Bike runs great.