Damn.. some of your guys numbers are killing me! I get 36-37 and my Fat Boy is all stock! All I have done to it are pipes. No A/C or tuner. I don't get it!?

 

I noticed a MPG increase on the first tank after the Stg 1, pipes and tuned. Then it declined steadily cause I added BCT baffles and I started not being gentle with the throttle anymore.

 

Don't worry about it, they all ride like old women.

 

From what I've read here many times, the dealer cannot, and will not, adjust your current map for a richer map, without you purchasing a tuner and having them dyno it. They have to flash an emmisions-legal map, which is too lean for power and engine health. But, you can buy those fl-vied-10's that socalsoftailslim mentioned. Check out Nightrider.com. These things are absolutely critical, imo, if you have a street map flashed by the dealer. They simply lie to the ecm, and cause it to think it's leaner than it is (which is already too lean), causing the injectors put more gas to the cylinders. That's really over-simplifying it, but they do work. You'll get more power than you have now, and a cooler engine. The fuel mileage will go down, but like DK said, great fuel mileage is often an indicator of a too-lean map. And if you're running a dealer flashed map, it's too lean. Not an expert, but I did stay at a, you know...

 

I know exactly what you mean.
After my Stage 1 remap a little over a month ago, I gained a full 4MPG, not to mention a boatload of decel popping and higher engine heat.
And from our pre-work discussions, both of them were exactly what the dealer assured me wouldn't happen...

See here:
https://www.hdforums.com/forum/softa...than-ever.html

Today I went ahead and ordered the cable kit and SmartTune software & DVD for the SE Pro Super Tuner they sold me (and probably didn't even use...)
The ViED's confirmed that it was still running way too lean, so they were worth it to verify that, and I'm still amazed how much difference I felt just by tweaking the AFR - but I'm hoping to do better and hopefully find a long-term solution with the SE Tuner.

 

You guys have convinced me, and I do have de-cell popping, contacted nightrider.com today and will order the vied-10 to richen it up. The last thing I need is burn up a new bike engine.

 

PM sent...

 

Hmm, looks like someday's about to get a deal!

 

Sounds like a good tune to me. I've got the full Stage 1.

This weekend I did the Laughlin River Run. I got 250 miles on the first tank at 80 mph with a tank full of California gas. However I only got about 160 miles on the second tank. That 2nd tank was Arizona gas and we hit 115 a few times. It's how you ride, what gas you're running and what your bikes sweet spot is. I don't think you have anything to worry about. Just keep an eye on the heat for a bit and if nothing comes of it, your golden! Enjoy the ride.

 

Getting any pops from the engine? Just pipes are probably making your really lean stock mix run even leaner. Also a bit down on midrange power and you're compensating with more throttle, might be part of the lower mileage. If I'm right on that, your engine is running hotter. Checking the rear spark plug should tell you if it's running excessively lean.