I'm just wondering how big my '91's tank is. The guy I bought the bike from said it only went 150 miles a tank, filled it up at 140 and put in 2.9 gallons. If it only goes 150 then that'd be like a 3 gallon tank. I've been reading around and it seems like my tank is 4.8 gallons, assuming that's with reserve. So...it is 4.8, right?