So I just bought a 82 xj650 for 300 never touched a bike in my life. Owner had for 15 years has ran I last 2. I change oil and filter and replaced battery I get power I'm in neutral and nothing. I dont know where to position the petcock to get it to start I tried all 3. However I notice there is a gas line leaking that runs out of this plastic holder for the air filter next to the carbarator. Where does this gas line connect too???