I have read through the fourms extensively and I have not seen this topic addressed. I have an 03 FLHTCI that I dearly love. It has by far been the best bike I have ever owned, very trouble free. I have the Stage 1 kit and the 'old' screamin eagle mufflers, you remember, the ones that made decent sound? Anyway, through no fault of my own, my mufflers got damaged, so they were replaced with V&H slashcuts. I like these mufflers much better than the old screamin eagle mufflers. Much deeper sound. I do a fair amount of touring with this bike, 3000 miles last week (my once a year get out of the house ride). @ 65-75 mph, I average 38-40 mpg, 55-65 mph average is sometimes as high as 42 mpg. I think I should be getting better than that. I have nothing to gauge the gas mileage from, as I had the dealer install the Stage 1 kit and SE mufflers before I took delivery of the bike. The motor runs great, plugs burn perfect. The only thing is a little decel pop now with the V&H mufflers, but I do not feel it is enough to justify $350 for a Power Commander. I am debating going to the true dual setup, using the V&H mufflers, but I don't want my gas mileage to suffer. I am an average size guy (5'11', 210), but I do pack it down pretty good for my bike trips. Gas mileage doesn't seem to vary much when the bike is not loaded down. Opinions please...

 

I get 37 city, 44 highway. Most of my riding is city (15 lights in 15 miles) riding to and from work.
I didn't like the Sceamin Eagles either, sold 'em on ebay for$12 less than I paid for them!

 

I have an 08 Ultra with 103 stage II, SE AC, Rinehart True Duals. Going like a bat outa hell on the freeway, I get 39-41. In town, 34 or so. I honestly don't care about the mileage, however, except out of curiosity - because it's SO much better than my Chevy Avalanche!

 

Have Rineharts TD's on my '01 RKC - Avg around 40mpg on the Hwy

 

I have an 07 Ultra with Bub True Duals, Big Sucker and Fuel pak. I am getting around 45.

 

I still have the stock 'y' pipes, and run with straight pipes.I run hard and fast, and I get 39 mpg, no matter what I do.

 

city I get about 35. hwy riding at 65-70 on cruise I get 46

 

Hows that sound?
No baffles or what?

 

42 on a bike with only slip-ons. This is 70% fwy and 30% city (my commute).

I keep hearing about guys getting 50+ mpg. Are they smoking crack or is that attainable?

Either way it beats the heck outta 16 mpg in the truck

 

07 Ultra ridden almost always 2 up, riders combined weight about 500lbs. Only mods are a set of SE slip-ons, yes the older style. I get 40-42 mpg all the time. Have a SE AC kit and SERT bought, thinking about maybe adding a cam to this for a wnter upgrade.

mps