Hi I joined cause im having trouble with my 1994 sportster 1200. Bike only has 12400 miles on it.The problem im having is it seems to have terrible gas mileage. I seem to only get 17 to 18 miles a gallon. And when I switch to reserve it seems to go through all the reserve gas in a matter of minutes. I have checked the petcock, airfilter, and carb. All seems fine with those three things. What could be causeing this issue????