[HotWheels]

Hey there. I didin't think the hole was the culprit originally when reading it how ever I was suspicious. Since you've plugged the hole and are still getting ill effects, the next thing I would jump on would be a thorough carb cleaning assault with a small copper wire in hand as well. 7.5 is right about where the biggest part of the main jet comes into play how ever it does affect everything below it as well. These carbs can get get a little tacky in there so easily...=/

When rejetting for my Muzzy, that was where the hard cold/warmed up acceleration took place to determin the proper main jet size. Mine have been clogged a couple times. Grab some carb cleaner and some 18 gauge copper wire and declare war.