31-10-18, 10:04 PM
It's more than just swapping out jets and needles but don't be tempted to omit any of the stage of the process.
I would advise you to just enlarge one of the pilot circuit bypass holes - the middle one of the three - and set the mixture screws at 4 1/4 - 4 1/2 turns out.
While you have the carbs out, I also recommend that you replace the O-rings on the float needle valve seats. These harden and start to leak as they get older, and most are old enough to be at that stage now. Do it while you have the carbs on the bench and save having to pull them again any time soon.
I would advise you to just enlarge one of the pilot circuit bypass holes - the middle one of the three - and set the mixture screws at 4 1/4 - 4 1/2 turns out.
While you have the carbs out, I also recommend that you replace the O-rings on the float needle valve seats. These harden and start to leak as they get older, and most are old enough to be at that stage now. Do it while you have the carbs on the bench and save having to pull them again any time soon.