I have a vito's 240 BBK. toomey B1 expansion chamber,air box lid off,stock carb,tors disconnected but not off the bike,aftermarket reeds but not sure what they are,UNI filter i think those are all the things that would effect jetting so with those mods should my main be around 320 or higher. This is just wanting to know what to start with. once i get the quad back together ill do a plug chop and fine tune it.