Hi guys many thanks for the advice .
It’s got a Rochester carb . Ethanol at 5% or 10. I am trying to use the Esso super + as supposedly it is ethanol free for now . Only in some parts of the country apparently. I add a fuel additive for what it’s worth . I converted the air box to run a kn filter which maybe wasn’t the right thing to do .Being freer flowing than the oil bath will be running leaner than is was.