good morning
on my shee. 10mil, 66.5 bore i m still using stock carb. 320 main jet, pilot jet 30, needle, fourth groove,1 turn air screw,elev.2000. my spark plugs chop is OK, since i will be rich if i go with 330, 340 on main,what does bigger carbs ( after market ) do for my banshee? i know bigger carbs = more fuel, more air other hand stock carb. 330,340 mine jet with 2.5 air screw turn = more fuel more air ! why still some guys would recommend 39-40 crab. for my 10mil ? since 66.5mm bore is OK with stock carb. in my opinion benefit from bigger carbs ( after market ) start after 67mm or 68mm cylinder bore.