I used a 3/1000 feeler gauge slide up into the seals on my wifes DR650 and it stopped the leaking for about two years now. The feeler gauge works better because it has its own structure whereas paper wouldn't hold up I wouldn't think.
Chrome and noise are no reason to ride a motorcycle!
:2002 KTM 640 DS :2003 Suzuki GSXR1000
:2005.5 KTM 950 :2007 VStrom 1000
:2008 DR650 :2009 Aprilia DorsoDuro
:2009 KLR 650 :more to come