Just give me a second before sending me off to read all the previous posts (trust me, I have been there). Picked up a used bike about a month ago, bike ran ok'ish but was hard to start. Changed the pilot from a 50 to a 45, bike ran better and was easier to start. And with some adjustment of the fuel screw no bog. Installed a JD jetting kit, bike ran great and pulled like a freight train! No bog at all! The suddenly, the bike started bogging. It's only a problem right of idle, if it gets up in revs there is nothing. Video: https://goo.gl/photos/4t5xVVXQRfa8Cqjb8 I do not believe the temperature changes across our practice rides are big enough to explain that big a change. I have tried 25, 38, 42, 45 and 50 pilot jets without much change. Also changing the fuel screw does little to the bog. Any ideas on what to try? Could my idle adjustment affect this?