Thebottle,
Regular automotive cleaners do a nice job of cleaning things up, however a complete off-the-bike cleaning is far more thorough. If you don't want to remove them, I would at least drain the float bowls as dirt and water can accumulate there.
Also as far as carb cleaners go, there is BG44k and there are all the others. I have been reading about this stuff for years but could never find it at any of the auto parts stores. After reading an article in American Iron magazine on 'Gasoline Additives' where there also discovered how well BG44k worked, I was determined to find some. It turns out that it can be purchased at most car dealers and big auto service shops. This stuff will completely remove any and all carbon deposits in an engine. I know this is more than you were asking for, but why not clean up the combustion chambers at the same time. I do recommend doing this just before an oil change as some of the carbon will liquefy and get into the oil. There's no point in running engine oil with this crud for any longer than necessary. If you can’t find it locally, send me an E-mail, and I’ll send you some. I now keep in stock at my shop. You should find it for about $20.00 a can. Use only half a can for a bike and a full can for a car.