The tank did not come with a petcock. I put in the stock one. At the top of both the main and reserve is a tublar screen about 1/2 in long that is very very fine. This filter had several pieces of plastic wrapped around it., Enough to slow the flow of gas I am sure. I am going to get an in line fuel filter to back up this stock one on the bike. In defense of the IMS tank it did say to clean the tank before putting it on, and my cleaning was a bit hurried. As for the tank its self I recommend it. Its fit is exellant, and when I drained it through the petcock all the gas was drained, so the tank capacity can be utilized. I havent had time to fill the tank for a test drive, but I am hoping. If not, well time to expand my mechanical skills. Any recomendations for the in line filter? Thanks for the help, and keep your fingers crossed.