Several manufacturers over the years have used two or more plugs. I have an OS 80H rear induction engine with two plugs, and I think Fox had a dual plug 60. Saito has some two plug engines and a Yamaha rider has added more plugs to his 80 hp Raptor engine. But, do they help? Maybe someone can respond here with real information, or at least plausible theory.

Sincerely,

Richard