I need to clean the carbs ( bike sat for three years) but I can't find a repair manual and don't know the trick to removing the carbs ( it looks like the air box can only come out after the carbs have been removed. Any advice ( other than run in the other direction) Thanks
Synchronizing and balancing the carbs will be a nightmare. I would make a diagram of what hoses attach where and mark each hose. If you remove any adjusting screws or jets, write down the number of turns it takes for removal and than put each one back the same number of turns. Before removing the carbs, drain them (assuming there is anything in them). Now get a spray can of Berrymans carb cleaner (or another brand), and fill the float bowls full of cleaner by disconnecting the fuel lines and spraying into each fuel line until the level in the line is reaching the top of the float bowl. Now wait for a couple of days while the cleaner softens the dried varnish residue in the carbs. Now remove the carbs as a set then dis-assemble and clean with a couple more cans of cleaner. 
Getting the pilot jets cleaned out is the big trick. If it will not idle, the pilot jet is problem.
Below is a diagram of your carb. The same diagram with the entire carb assembly AND your entire bike can be found at Babbitt's.
Go to the site below where you can see a parts diagram for your specific bike. You will select the actual brand, year, model, etc., once you go to the site. Part numbers and prices are also shown. You can order parts from this site. In the event no price is shown on a particular part, the part is not in stock. www.babbittsonline.com/pages/parts/viewbybrandand/parts.aspx
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Another hint... You should pour about two ounces of "Seafoam" into your main fuel line. Run the bike for a minute and then let it soak in the bowls and passages of the carbs fore a day or two. Start it every day for a couple minutes to bring fresh seafoam into the carbs and it will clear all the crud without a rebuild. Get it at any auto parts store and use it in the gas for the first few tanks to clean things out.
A complete rebuild is a serious bit of work and there are a lot of things to know. Try it the easy way first.
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