I have been riding/driving since 1970 & have seen all manners of fuel savers, fuel devices, fuel catalysts, etc, etc, ad nauseum, come on the market. If these things were that great, the car manufacturers would use them. Heck, they would be the ones who would have manufactured them in the first place, with the massive amount of engineering brainpower they have. If there was a way to more cheaply get better gas mileage, the automakers would have done it by now. They have every incentive to do so, since the feds are continually requiring higher average fuel economy numbers. The carmakers are continually having to modify their engines to do better and better, and that is expensive to do. The hybrids are now gaining popularity, and billions upon billions of dollars were poured into that technology. Finally, at sea level, the ideal mixture of air/fuel is 15:1. No one can change that, whether it is catalyzed or non-catalyzed. Your ignition, engine style, weight of bike & rider will determine the end result-gas mileage & power.
Hope this helps.
Regards