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You put a D&D exhaust on your bike. The warranty compliant tuner cannot accommodate it. Put the Harley Street Cannons on.
Essentially the Screaming Eagle warranty compliant / epa compliant tuner can only work well within certain parameters. The components it is made to work with are sold by Harley.
Aftermarket tuners can work with a wide range of components but are not EPA compliant and thus will void your warranty.
The D&D is a great exhaust and with the right components with a proper tune will support big power. However it flows more than the parameters HD tune, which is set up for the stock head pipe with street cannons.
Wow I have nothing to say that would help you just an opinion, I would have given a builder my 7K way before i considered HD, I can only dream of what kind of work you could have had with one of the sponsors here, granted it would have shot your warranty but you have already done that with the DD. Welcome to the forum.
There are plenty of guys doing stage 3 and 4 builds with the D&D exhaust and the Harley tuner isn't the best fit as others have said. BUT, performance shouldn't suffer that much. Maybe some lag through a certain small rpm zone or minor hesitation, but nothing you can't easily work your way through with some minor throttle control once you know where the spots are.
If it's running that bad go into the software and check the tuner settings. Could be something simple is off.
PS, any dealer that has done a couple of stage 4 builds knew there would be minor rough spots and a good one would have told you that up front. As others stated, the only way to eliminate it entirely is aftermarket tuner (void warranty) or back to H-D exhaust. My dealer told me and I went stage 3 instead of 4 based on where I spend most of my time in the rpm range.
Welcome to the forum, sorry to hear about your issues. Here are a few thoughts are listed below.
1 - it starts with you paying $7k for a $5k job. The stage IV kit is about $2,600, 10 hours labor and exhaust. Not sure what else they sold you other than a air cleaner. Ok, can’t change what you paid but next time shop around.
2 - D&D is a really good exhaust but is not compliant and voids your warranty.
3 - As mentioned the HD Tuner cannot tune your bike outside of complaint parameters so having issues isn’t a surprise.
4 - You can either swap exhaust or get a different tuner. If you get a Power Vision for example and a good Dyno Tune it should fix your issues. Now the installing dealer should warranty their work even if HD does not. If you swap exhaust you can go with the HD SE full exhaust with high flow cats in the mufflers or the S&S compliant exhaust. Both of these have 18mm O2 bungs so you can run the HD auto tuner. Going this route will cost you another $2k but should keep your warranty intact, if the dealer removes all traces of the D&D from your file, and fix the issue. I’ve ran the S&S system on 2 bikes with the HD auto tune. I think it’s an awesome set up and the more you ride the more fine tuned it becomes.
5 - Last thought depending on the temperature when you are riding it could possibly be your TPMS kicking on. When the bike is hot and at idle the system cuts off one cylinder. It does not cut back on until you twist the throttle. This can cause a slight hesitation when taking off. Try disabling the TPMS by twisting the throttle forward and holding it until the display shows it is disabled. If you feel you need the TPMS on try twisting the throttle slightly twice just before you take off. This will turn off the TPMS, could possibly fix the hesitation you are noticing.
Good Luck...
Not that I want to see you spend anymore of your money but an option for you would be to pull your ECM/computer and narrow band O2 sensors and put them neatly on the shelf. Go buy a Thunder Max stand alone tuner it replaces the factory ECM your D&D pipe should already have the correct 18 mm threaded bungs for the wideband O2 sensors. The pain in the *** part would be swapping your stock stuff back on the bike before taking the bike in for warranty work or service if you let them service the bike. The Thunder Max does not require dyno tuning, because it tunes as you ride, same with swapping out go fast parts. However a good tuner will definitely be able to tweak the TM by adjusting the air fuel ratio and the timing depending how comfortable you are with going to the edge.
Last edited by c4yourself2; Feb 24, 2019 at 06:46 AM.
They way I see it is you have a couple of choices here, 1st choice. Install a Thundermax tuner which will replace the stock ecm and have the bike properly tuned.
2nd choice, have the bike properly tuned with a TTS tuner which cannot be traced by the mother ship when put back to stock settings. You may want to contact Steve Cole on this but this was brought to my attention this week.
Hope this helps !!
Not that I want to see you spend anymore of your money but an option for you would be to pull your ECM/computer and narrow band O2 sensors and put them neatly on the shelf. Go buy a Thunder Max stand alone tuner it replaces the factory ECM your D&D pipe should already have the correct 18 mm threaded bungs for the wideband O2 sensors. The pain in the *** part would be swapping your stock stuff back on the bike before taking the bike in for warranty work or service if you let them service the bike. The Thunder Max does not require dyno tuning, because it tunes as you ride, same with swapping out go fast parts. However a good tuner will definitely be able to tweak the TM by adjusting the air fuel ratio and the timing depending how comfortable you are with going to the edge.
Originally Posted by BuzzCap7
G'day mate,
welcome to HDF.
I will be your tour guide. Be sure to read the manual before posting ok mate?
Or we will have discipline you and if you don't "get it" we will need to discipline you biker style.
Now, for your orientation. Go down the hall on your left to the 1st room. No, wait. The 1st room on your right. That is where the commissary is.
Then you will see doors marked for the mortuary, skeet shooting, a room where we make fun of In-Jun bikes, and of course we have a ahh, umm, oh yeah a across the hall.
We had a BOMB MAKING room but, well, ahhhhh, 1 of the guys just didn't understand Blasting Caps very well so..... you know.
We have our own pub .
There are several places where you can familiarize your self with the .
So don't be a wall flower watching others . Get involved.
See you around mate. I am going to the commissary now.
**** ON THE SERIOUS SIDE ****
**** I AM NOT ONE TO GIVE ADVICE ON HOW HDF WORKS BUT **** **** AND THE FOLLOWING IS UNOFFICIAL ****
You are in the New Members Area where you can introduce yourself and let us know what Harley Davidson bike(s) (if any) you ride/own.
If you have questions about engines, exhaust systems, audio issues, etc then:
1) Please go to the upper corner and Roll Over Forums
2) Then come down to and Roll Over Harley Davidson Tech & Mechanical Forum
3) Then come down to the section that would be most appropriate for your question like Audio Systems, Engine Mechanical Topics, Exhaust System Topics, etc and CLICK on the topic you have a question about.
You will find the knowledge here is EXCELLENT and these here mates are willing to help you in any way they can. juss be careful. There are some Trolls, so I suggest just ignoring them ole farts.
See you around HDF. Come often, we have a humor thread, game thread, and a LOT of other stuff.
Have A Great Day Mate,
BuzzCap7
I appreciate the direction, sorry about the misplacement of my thread
Welcome to the forum, sorry to hear about your issues. Here are a few thoughts are listed below.
1 - it starts with you paying $7k for a $5k job. The stage IV kit is about $2,600, 10 hours labor and exhaust. Not sure what else they sold you other than a air cleaner. Ok, cant change what you paid but next time shop around.
2 - D&D is a really good exhaust but is not compliant and voids your warranty.
3 - As mentioned the HD Tuner cannot tune your bike outside of complaint parameters so having issues isnt a surprise.
4 - You can either swap exhaust or get a different tuner. If you get a Power Vision for example and a good Dyno Tune it should fix your issues. Now the installing dealer should warranty their work even if HD does not. If you swap exhaust you can go with the HD SE full exhaust with high flow cats in the mufflers or the S&S compliant exhaust. Both of these have 18mm O2 bungs so you can run the HD auto tuner. Going this route will cost you another $2k but should keep your warranty intact, if the dealer removes all traces of the D&D from your file, and fix the issue. Ive ran the S&S system on 2 bikes with the HD auto tune. I think its an awesome set up and the more you ride the more fine tuned it becomes.
5 - Last thought depending on the temperature when you are riding it could possibly be your TPMS kicking on. When the bike is hot and at idle the system cuts off one cylinder. It does not cut back on until you twist the throttle. This can cause a slight hesitation when taking off. Try disabling the TPMS by twisting the throttle forward and holding it until the display shows it is disabled. If you feel you need the TPMS on try twisting the throttle slightly twice just before you take off. This will turn off the TPMS, could possibly fix the hesitation you are noticing.
Good Luck...
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welcome to HDF. 
Be sure to read the manual 
before posting 
ok mate?
and if you don't "get it" we will need to discipline you 
biker style.
on your left to the 1st room. No, wait. 
The 1st room on your right. That is where the commissary is.
ahh, umm, oh yeah a 
across the hall.
you know.
.
.
wall flower 
watching others 
. Get involved.
