First off,they are talking about 200 miles.........including RESERVE !
I easily get 200 miles per full tank.

I think you mean that your reserve light comes on at 130 miles.
You must be riding fast and/or twistin' the throttle.
Riding between 60 - 70 and bein' easy on the gas I easily get 180 miles before reserve comes on.
Once you go past 2500 rpm the gas mileage goes into the toilet.
A PCIII won't help mileage and you only would use one with a big air kit.
You can put a 65 tooth rear pulley on and a 215/60-17 and lower your rpm's.
JJ