All my bikes I only run on 'reserve' and have in-line filters and people say that's dumb and it'll screw them up (by running it on reserve all the time). Glad I was doing the right thing anyway,,, even if I do it just because it's no fun to be blasting up a hill and all of a sudden lose throttle when you need it most. THATS REAL FUN ON A 70's 500 THUMPER.