So I am in the process of getting my 83 650 rebuilt, been a project and was my father in laws old bike, so I figured it would be worthwhile to get back running. After rebuilding the carbs a friend and I used an aux. gravity fed fuel tank to shake down the motor and carbs. Bike fired up beautifully and ran great. I put my tank on with vacuum petcock and it won't start, spray a bit of fuel in the carbs and it finally starts, but only when choked up. Vacuum line is going to the carb, I tested the vacuum and it has a reading of 10 lbs. or however you measure vacuum. I pull tank back off and just run a funnel directly to fuel line to carbs... and voila. Fires up beautifully again. I am assuming its an issue with the vacuum petcock. The petcock is brand new. Long story short-ish, does anyone know where I can find a gravity fed fuel petcock? Or is it worthwhile to try and rebuild my original petcock? Any input is greatly appreciated.
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