Originally Posted by Himcules
front wheel wells... look on the frame for a wire look that looks like this:
after parking and shutting the engine off, pull the loop till air stops coming out.
Actually, there will most likely be less than a 3-4 ounces of water in there, unless you haven't drained in months. The driers keep the moisture to a minimum. If you listen, you can hear when the water is all gone and only air remains; usually less than 5 seconds, but normally just 1-2 seconds.
As far as draining ALL the air, not at all necessary. I like to keep my tanks under pressure so that next time I start the engine, I don't have to wait a minute or two for the tanks to pressurize.