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[rayson56]

Canned maps from Harley to be used in accordance with the EPA guidelines usually with their "stage kits"

[Doc 1]

Canned maps from Harley to be used in accordance with the EPA guidelines usually with their "stage kits"

Harley meets the EPA standards by choking the air going in with restricted air filters and choking the air coming out with restrictive exhaust........less air equals less emissions. The maps are NOT lean in any since of the word. The no load cruising area is around 14.5 to 14.45, this is not a lean condition, the loaded area like passing or just playing around is anywhere between 13.5 to 12.5 depending on the bike.....this is certainly not a lean condition. My point is Harley maps are not lean or what some call an EPA map. Not trying to be snooty here, I just hear this all the time in my business and I just want to express  EPA maps just don't exist.  Trust me.....when we install headers, mufflers, high flow air filter kits we are a EPA violation. More air equals more emissions.

[FLSTFI Dave]

Good information Doc.  Makes a lot of sense on the air in and out of the engine.  I do know the high flow CVO air cleaners on the M8 bikes are quite restrictive and not high flow.

[Mofo67]

Thoughts on this being lean, please share insights.

HD 131 just like HD has intended except S&S MK-45 mufflers. Canned tune from SEPST. Bike runs great, little weak below 2,800 due to cam, very HOT due to cat. No exhaust fumes and MPG around 38 depending on riding conditions. Speeds over 70 seem to significantly reduce the mpg.

Removed the H-D head pipe that came with the kit and installed a Fuel Moto 2/1/2, not the XXX, and kept the S&S mufflers. Added the H-D auto tuner, no other changes.

Exhaust note is substantially louder, more power at the entire RPM range including under 2,800. Bike runes noticeably cooler, smoother and the last tank of gas after nearly a 400 mile ride the mpg was about 40.5. Much of the ride was 75+ mph. I ride 190 miles on that tank, the most I’ve ridden between gas stops since I had the 131 installed, about 3k miles ago. No weird sounds from the exhaust and no popping or cracking when on decel.

I notice when I’m coming to a stop that I have some exhaust fumes. Does not smell like raw fuel just smells like a combination of fuel and oil. I’m assuming this is just because there is nothing to filter out the exhaust since there is no cat in place. The guy riding behind me say he did not smell it and it was not strong enough to leave an odor on the clothes I was wearing, but noticeably to me since before there was no smell at all.

I assume with a cooler running motor and better MPG things should be ok. Not really wanting to change the tuner until I change the cam next year.
I appreciate any thoughts on insights members can add.
Thanks