Ah, modified at both ends. That's a horse of a different color; you'll need to open a carb up see what's in there before you can proceed. The main jet and pilot (slow) jet will need to be larger than stock with that much air flow.
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)
