I had my carburetors out to check why I was getting a klunk when warming up the bike. I found my #4 vacuum slide was sticking when in the down position - so much so that I would have to carefully pry it up to get it out. After looking for a while, I noticed that the needle jet where the piston needle seats was uneven - probably from re-installing it with a metal punch - and 'grabbing' the needle from the piston. I removed the jet and cleaned up the hole with a drill about the same size (slightly smaller) than the hole in the jet. My question: will I be ok with this or is this a close tolerance hole that I would have damaged and need to order a new one (with whomever carries them)?