Something really simple that worked for me, is turning off the fuel, at the switch/tap, every time you turn off the bike. Even if you are only shutting it off for a minute or two. Some guys go so far as to shut off the fuel tap, a few tenths of a mile before you reach your destination. I'm not sure what the deal is, either fuel continues to gravity feed, or vacuum draws it in, but when you leave the fuel tap on, it almost always causes a flooding condition. BTW, having your bike in good tune always helps as well, i.e. synched and clean carbs, good plugs etc. Hope this helps!