1974 Suzuki RV90 I just bought, and am working on to get it started. I now have spark back after cleaning the points. It appears to have a vacuum controlled petcock. Does anybody know what positions are what? Horizontal to the ground = ? Up towards the sky = ? Down towards the ground = ? I removed the little filter bowl at the bottom, and if I flip the lever from horizontal to UP, gas flows freely out where the bowl was. It doesn't do that if the lever is horizontal, or down towards the ground. So, I'm not sure what is what. I have a broken throttle cable I have to repair as of yet, so the slide in the carb doesn't go up and down, and I can't start the bike just yet. Thanks for your help.