What's best way to clear sludge from m/c tank?tank is off bike now.?

like what you think is in there you should be able to used gas and shake it a round could fill it with water til it flows over and let it run thru it for a few minutes and then blow dry the tank or blow it out with air not a lot of choices ive never had any sludge... but that what i would do pour out what you can and fill with water with the cap off and let it flush it self