Seafoam?

[Hammerhead]

I've been using seafoam for years..in everything from Motorcycles to chainsaws. Just add it to your gas every once in awhile or for storage. A ol'boss'o'mine would decarb his truck fleet motors with a ajax and water mix poured slowly thru the carb while at high idle. I dunno if that's a bad thing but it'd smoke like a volcano and then would run better than before.
I use yamaha Ring Free for de-carb.