As I'm still having a problem with some intermittent popping even after a tune-up I thought I'd start having a look at the carbs to see if air is leaking in. I was hoping to hold off and do a rebuild during the holidays so for now I left them in. Here is what I found though: Until I can get a rebuild kit I decided to try my hand at making my own gaskets. The left ones were my first attempt but they were too think and I couldn't find the right size shims on the weekend but I managed to get some thinner gasket paper. More like the original. God knows how long these screws have been here. Obviously someone has been at these before as with most of my engine which has been hacked at. Not surprising the element is broken inside the enrichment box. I'm yet to see anyone come up with a suggested replacement other than finding another original and I know most people say it doesn't do anything but it would be nice to have it working. For now I cleaned it up and put it back on.