John,
Mod's will have alot to do with gas milage and my TBA has all the Mod's we speak of here.
Rob05BA has a good explanation of it come to the NH rally and I will get him to tell you all about it.
Basically think of the engine as a pump the easier it draws (move air) the more effiecent it becomes.
On our recent trip to GA. Rob and I were going 145 to 155 miles before hitting reserve. We averaged between 45 to 50 miles per gallon.
Mod's: Freak, 45 mains, 155 jets, one shim with stock pipes with two baffles removed.
Hope this helps, welcome to the site.
John
