[Japhy]

So I had to pull the heads off the harley to replace valve stem seals, and found about .020-.030" of carbon and coke build up in my combustion chambers and piston tops. Getting it off the flat top of a piston was easy enough, but what would be a good way to remove it from the c. chambers and exhaust ports? I read online about wire brushes (seams kind of agressive) and even oven cleaner (used to use lye solutions to etch aluminum propeller parts prior to dye pen inspection -don't really want to do that either). I know most of you car guys are running aluminum heads these days, so any firsthand experience would be appreciated.