That was fun. Started bike up yesterday to ride an event and felt it was a bit boggy off the bottom. Went to adjust the mixture screw and it the screwdriver just kept going in. Looked into the hole to find the screw had bailed. Never seen that before. Now it has a Jitsie adjuster and that's harder to get to than the original. Time for the spring disassemble and clean on the Keihin. I think I'll cut a groove in the Jitsie screw so I can turn it without forcing my fat fingers in under, over and around the muffler.

Get yourself Beta p/n 1241757 800  then you could adjust w/o the screwdriver and not burn yourself either.

Got one in the toolbox. In the garage. At home, where it was no help at the time.