clintjoh,I have a 06 AE and here is my observations to your questions,1. Ambient air temperature has nothing to do with the grips heat, when switched on it has a minimum heat setting relative to the rheostat setting (see answer # 3) - Yesterday I accidentally bumped the rheostat to #5 and my hands were burning up before I realized what was going on! It was 92 deg F @ 94% humidity! :huh: 2. Without Grip Puppies[SIZE=12pt]© 3 to 5 minutes to achieve minimum heat setting, with Grip Puppies© 5 to 7 minutes3. The factory grips are speed sensitive - well engine/gear sensitive. Whether you have an AE (standard heated grips) or an A model (with optional factory installed grips) the voltage is governed in relationship to the gear/speed you are in/at. At idle (this is not the exact Yamaha description) the grips get say 8 volts supplied to the heating elements (remember that is relative to the rheostat setting that you have selected). As your speed/gears increase, the voltage to the grips increase to a maximum top range, thereby heating up the grips as speed increases. As you slow/stop, the voltage lowers to the grips. This keeps your hands at a relative temperature. Now I have noticed that if I selected the MAX heat range on the rheostat, as I increase speed, the difference in grip heat is minimal.Hope that helps!Violione[/SIZE]