If you get an aftermarket one make sure it has a little hole in it, if not just drill one and make sure it's installed facing up.
How's the temp gauge? Is it below normal (mid section)?
1999 DI - LR HD Springs
1996 DI - parting out
1995 DI - parting out Scorpion Racing Extreme Kit
1994 RRC LWB - 3" AG lift
1991 RR - parting out (few parts left)
1990 Kawasaki KL650B Tengai - parting out
1989 Kawasaki KLR650
1988 Kawasaki KLR650 - parting out
1979 Puch XK
1980 Puch Magnum MKII
1980 Puch Magnum MKII - parting out