fuel additives?

[Hammerhead]

I've been using seafoam (once a month) Marvel Mystrey Oil ( add some during oil changes) and ring free (add to gas every oil change in all my motors,..for years. I notice the benifits the best in my 1800cc Honda Vtwin bike.

An ol'wench I knew decarbonized his motors with ajax mixed in water....right down the intake at a high idle. Chunks of stuff would come out in the exhaust. I dunno how good that actually is for a motor tho'. Any thots'?