Hi, Scooterbob, We have tried Sta-bil, 104 Octane booster, running it out of gas, wd-40 sprayed in the float bowls, etc. It seems like the 500 has such tiny passages that unless we leave it running constantly, it just won't stay free. Also, the taking off, apart, and back on is MAJOR surgery for me on this bike. I have not tried the product you suggest, and will look for it next trip to town, so I do appreciate that. Maybe it will help the other bikes. I am just so sick of the multi setups with their tiny-hard to access parts, just seems like one carb would be soooo nice. I don't have the trouble on my 2 cycle bikes, is it the oil mixture that keeps 'em starting? We have had the 500 since 1981, so this isn't necessarily a lousy gas problem, tho I do agree that todays goop should be ran up- -well, never mind, it is lousy tho'. I seen a couple of 750 Honda CB's with one carb on the end of a log back in my chopper days, they seemed to work, but I always wondered about lean/rich conditions with it on the end. Thanks so much, J Byrd