When it's at 220, does it hold 220, or keep getting hotter and hotter after the fan comes on?
If it'll hold 220, I wouldn't worry about it. I know on my bike, 220 isn't overheated.
You don't want to turn the bike off at every light, for a number of reasons, but the one relating to this being that when a hot motor gets turned off, it actually gets a little hotter. So you don't want to be turning the thing off and on a bunch.