If the bike has set for more than six months (sometimes even less) at any time, it's a good idea to clean the carbs. While it may seem intimidating if you've never done it before (I never had and was intimidated the first time), cleaning them is really not that difficult, especially with Larry's book in hand.
That being said, the carbs may or may not be your issue - it could also be electrical. You could do a compression test. It only takes about five minutes if you have the tester to eliminate compression as an issue.