So, I took my 12mm carb and drilled it out to 19/32. I sanded it down smooth everywhere, and it looks really good. I took everything out so it was just the carb body, so I didn't hit the brass piece. I put it on my maxi, and it won't run. I think I have the right jet, it starts but won't idle. I can get it to run if I give it gas, but even then it dies out after like 5- 10 seconds. Any thoughts?