I bought a 2003 Yamaha GP800R that's in pretty nice shape. They guy I bought it from said the the carbs were in need of a rebuild. I pulled the carbs and rebuilt them. Its getting fuel to the carbs and coming out the return lines. I'm not sure about the lines to the carbs. They guy had been working on the fuel system. Is the return closest to the top and the feed on the lower? There is a spray pump on one carb and it is not getting fuel at all. Any help?