The actual machines are kind of expensive, but the car washes where you drive into the bay and wash your bike with a high pressure wand are power washers too. They work really well for getting into those awkward places. Kind of spendy, but worth it if you’re trying to make your bike look nice.
I also use a rubbed on chrome polish to shine the bike up, since I have an abundance of chrome. I swear Honda just wanted to show up HD in a chrome-based dick measuring contest. So far, Honda wins.
Here’s an inexpensive power washer, BTW: http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=99741
But I suspect that as usual with Harbor Freight, you get what you pay for. Some of their stuff is decent though. Sanders from there are good, so far I like the motorcycle jack I bought, and their pneumatic equipment seems decent for budget priced tools.