Hi guys, after long years I ve finally got me a CB750 ohc, pretty beaten bike, I ll have to spend long time and effort to bring it up to shape. I finally made it run but the first problem I want to solve is that idle goes up and down. If I leave her alone it will keep it, but if I hit the accelerator briefly then it revs up and it s kind of hard to get it down again, sometimes pushing down the acc bar works, sometimes it doesn t, and sometimes it goes up and down by itself. Feels like an air leak issue but don t see where from. Can You guys help me in this one?