My buddy Howard has a 96 clutch bike and his gas mileage is really bad. He just did plugs, wires, cap, and had the carb rebuilt and he said the bike runs great but he is getting 10 mpg or less. He said he is running 3500 rpm's at 70 mph. I'm sure that might be part of his problem but I have ran at 4000 rpm's for long runs and the worst mileage I ever got was 17 mpg. I normally get around 21 mpg. You guys got any ideas what the problem is? Is this normal for that bike?