I'm contemplating a cam change to get rid of the chains and worn out tensioners. I'm thinking TW21 or TW26, and I'll probably run a DFO. Running a 2000 RK with stock bore, stroke & heads, and gearing. Stage 1 and two-piece touring mufflers. My question is to those of you who have done a build with these cams, what effect did it have on your gas mileage? I tend to do long runs, frequently in areas where gas stations are few and far between, so it matters to me. I normally get in the high 40s when I'm traveling. Thanks.