I have one of those too, the gas is fed by a vacuum, check the 2 pipes just below the gas tank bolt, take the seat off and they are right there in the front, run a piece of wire through it to make sure it's clear. The arrow on the. petcock should be up or down, in the middle it primes the carb and will fill the engine with gas if you leave it there. Mine fired right up after I cleaned the vacuum lines. I had to replace the rectifier also and rig the wiring, and got it wrong , it doesn't charge the battery but I ride it every day, that's why I'm here trying to find out which wire goes where.