I own an 883 sportster, '87. Things older than me but it's my first so i love it. Recently it has been giving me some glitches because i layed it out next to me on the side of the road one day while driving from a friends house. Anyways, So i take it to the shop because i was able to straight'n out most of the problems, but not all of them. When i brought her back home i decided to change the oil and such, and when i took out the drain plug and the oil filter it drained about... a quart. So i take off the oil cap and look inside to see a weird.. film looking thing inside the tank. When i couldnt pull it out with the needle nose i took a wire hanger and unwound it into a small hook and ended up pulling out, chunks by chunks some weird... clothlike-paperlike cleaning sheets. Its late and my brain isnt working well so forgive me if im not explaining it well, but its kinda like a dollar bill material. more importantly, i think some of it shredded off into one of my tubes because when i removed the big chunks it still wont drain anymore, even when i run it fora sec. Any suggestions would be great, thanks guys. Also, The reason i have'nt pulled it apart and all that good stuff is because its my main mode of transportation to work, besides my overgrown truck that eats gas horridly. So yea thanks for any information, i dont wanna blind-shot this tryn to fix it myself, and i dont want to take it back to the mechanic if i dont have to.