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ECM/Fuel Management systems ECM/Fuel Management systems For Road Glides

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post #1 of 24 (permalink) Old 07-31-2017, 04:02 PM Thread Starter
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SEPST First tune

Hello all,

So, I previously had a TTS Master Tune for my FXCW. It was the cats ass. But now, I have done the Sage III upgrade on my 2017 RGU, and that came with the SEPST. I recently updated the map to the newest one available (there were changes made apparently) and because of this, I did a tuning. After doing a good 40 min ride, I notice that there are quite a few cells that are red.. Meaning Max allowable value. Does this mean that I cannot tune past that value, or is it in relation to the other values of the map?

If It means I cannot tune past that... then do i need to go shopping for an other TTS Mastertune?

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post #2 of 24 (permalink) Old 08-01-2017, 12:09 AM
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The sepst is epa compliant. So I would say it's maxed out on added fuel for those cells. I had the Same problem and ditched the SEPST for a Power Vision. Runs way better now with the Power Vision.


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post #3 of 24 (permalink) Old 08-01-2017, 12:43 AM Thread Starter
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The sepst is epa compliant. So I would say it's maxed out on added fuel for those cells. I had the Same problem and ditched the SEPST for a Power Vision. Runs way better now with the Power Vision.

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Im a Fan of the TTS MasterTune, as I am familiar with it. I had one for my FXCW Rocker, and it helped a LOT. Power vision would clutter my setup, I like clean looking as well.

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post #4 of 24 (permalink) Old 08-01-2017, 12:53 AM
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Im a Fan of the TTS MasterTune, as I am familiar with it. I had one for my FXCW Rocker, and it helped a LOT. Power vision would clutter my setup, I like clean looking as well.


The power Vision does not have to stay hooked to the bike. Get it tuned and throw it in the saddle bag.


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post #5 of 24 (permalink) Old 08-01-2017, 01:42 AM
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Not trying to high jack your tread but if a person has a sert installed from Harley can you still add a power vision tuner without any problems. Will the two tuners fight Against each other.

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post #6 of 24 (permalink) Old 08-01-2017, 04:01 AM
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Not trying to high jack your tread but if a person has a sert installed from Harley can you still add a power vision tuner without any problems. Will the two tuners fight Against each other.


No they will not fight against each other. They are both flash tuners that can be tuned on a dyno. The SERT is a great tuner. The issue now is because of EPA regulations Harley no longer sells the SERT. If you already have a SERT you are good. The pro street tuner is epa compliant so it only allows the operator to add EPA compliant maps. I have one in my cabinet at home doing nothing. I should of bought the Power Vision first. Hope this makes sense I was kinda rambling.


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post #7 of 24 (permalink) Old 08-01-2017, 10:48 AM Thread Starter
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I was at the dealer yesterday asking the same question, they are a very helpful bunch in the back. The dyno god told me that with the Stage III tune, its pretty much under fueled due to EPA restrictions. He said the best bet for me, since my 114 bike is running into these problems, I "should try" the matching 117 map. As long as the cam was the same, It will help me get more fuel.

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post #8 of 24 (permalink) Old 10-10-2017, 07:08 AM
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Quote:
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I was at the dealer yesterday asking the same question, they are a very helpful bunch in the back. The dyno god told me that with the Stage III tune, its pretty much under fueled due to EPA restrictions. He said the best bet for me, since my 114 bike is running into these problems, I "should try" the matching 117 map. As long as the cam was the same, It will help me get more fuel.
What is the Fuel that you are selecting for of AFR table? Does it has any benefits to use 10% ethanol instead of gasoline? That is richening the AFR, via versa gasoline is having the leanest AFR values.
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post #9 of 24 (permalink) Old 06-28-2019, 02:11 PM
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I am in the same situation. I had a PV, but then had the Stage III installed to bump to 114. They installed the SEPST tune. I talked to the service manager and he mentioned that if I go back to the PV, it will likely void any engine warrant claims while I'm on the Extended Service Plan. He said that MOCO requires the first thing to do is hook up to the computer and see what the tune is. If not a MOCO tune...then bad juju.

I don't know if that's a valid statement or not, just what the service manager said.

Second question, how do I lean out the map in the SEPST software? I tried page down, entering the numbers themselves, down arrow. Trying to lean it out a bit in the cruising range for MPG.

BG

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post #10 of 24 (permalink) Old 06-28-2019, 02:29 PM
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Buy a Thundermax and be done with all that Harley epa limited half-tuner bunk.

It'll be the cheapest horsepower you ever buy.
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