I put a 19 tooth sproket on friday and rode to Tulsa of a tattoo convetion (270 miles one way) it did pretty good as long as I was doing at least 70 75 mph any slower it was lugging at it's pretty hilly from russleville to OK state line but as long as I kept my speed up it was ok at 70 I was turning 4200 revs

2005 America 145 mains, , #48 pilots, , k&n pod filters, ported intakes manifolds, nology coils and wires, pro com CDI, 62 HP at wheel 68,000 hard miles still runs great gone "traded"