Thanks for all the responses guys. I never considered that pressure washing a hot engine would cause steam, which can easily get itself into cable and such and cause all kinds of havoc, make sense though! Good thing I decided to read this thread again, I put a hose in the tub this morning so it'd be nice and thawed when I get home from work to wash it!
I don't care that it looks dirty, I just need to do some work on it and there's oil and grime all over where I need to work....Guess I'll just need to get dirty until it warms up a bit. Which brings me to another question, where can I get a reasonably priced trailerable cover for a pol wedge chassis with some pretty wide and high handlebars?