This is what is happening. The front bowl is set nice right above the bottom of sight glass and the rear bowl just fills up and overflows rapidly. I can't figure out why.
2 things, one is easy to check the other you would need to take the bowl off to check. most of the needle valves have slots in them to use a screwdriver on, try to screw the one down if possible, if that is the one that is flush already you might have to take the bowl apart, something could be messed up with the seat, see if you can adjust the one that is overflowing to match the one that seems ok, on mine they appear to be matched perfectly to the naked eye
