Help Required Explaining Re-mapping Etc.

Discussion in 'Technical Help' started by pseudonym, Jan 13, 2026 at 8:39 PM.

  1. pseudonym

    pseudonym New Member
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    Dec 22, 2025
    15
    3
    Glasgow
    My bike is a, one previous owner, 2008 Bonneville T100 with 5500 miles which had been laid up since 2011 so I am working my way through it. It is fitted, when new from the dealers, with Norman Hyde Togas, K&N air filter, Hi Flo Bell mouth intake and an air injection removal kit, with an Arrow re-map.

    Although having had bikes for nearly 50 years all this EFI & Re-mapping stuff is new to me as I am used to carbs, so I am looking for a wee bit of help, in the simplest of terms please!

    I was thinking of changing the silencers, to what I don't know yet, but something a bit different. However on reading up on it people mention if you put on different silencers you have to get it re-mapped, then I came across somebody saying they fitted a different silencer then let the bike run for 10 mins to let the ECU settle with the new configuration.

    I know it may be a basic question, but I am not used to all this electrical wizardry, so please bear with me.

    Could someone tell me the difference between a re-map and letting the bike run at idle for a length of time as mentioned above?, I may be getting confused, but if you let the bike sit at idle does the ECU not just tune mixtures and settings to idle speed settings?

    I would rather ask a simple question than mess things up if I do change silencers.


    Thanks
     
  2. Iceman

    Iceman Crème de la Crème

    Apr 19, 2020
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    Hi, firstly saying it had a re-map is incorrect, when the Triumph dealer fitted the extras, what happens is they upload a different factory map, not a re-map. What takes place with a dealer map is that it allows the correct fuel/air mixture, so the machine rides smoothly. The Norman Hyde Toga exhausts on their own do not require any change, they are fit and go. The rest of the modifications will have limited benefit from the arrow map, however that map is specifically for the approved Triumph Arrow Exhausts. A re-map, or ECU flash as some refer to it, is where the machines ECU is connected to the dynometer on a rolling road, using as an example the Woolwich Racing Map, firstly a reading is taken on the machines stock readings, then that information is stored safely on the system, the map is then customised onto the ECU, the bike is then run up at different speeeds, it shows on the graph the original readings and the new readings on the re map, it takes a half day or more to set it all up correctly, and you can see the difference in BHP increase and smother running. The question you ask regarding the ECU recalibrating itself, this is correct for the newer machines, however, as yours is a 2008 model it will not recalibrate by that method. Changing the silencers will not require any recalibration.
     
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  3. Robbi18

    Robbi18 Member

    Jun 15, 2025
    25
    18
    United States
    If you change your silencers now, you'll need a new professional remap. Your current Arrow map is specifically for your old setup. The idle trick only lets the computer make tiny adjustments at idle, not across the whole rev range. For different pipes, a full remap is the safe way to go.
     
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  4. pseudonym

    pseudonym New Member
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    Dec 22, 2025
    15
    3
    Glasgow
    Thanks very much for the info.

    As I have the Hyde Togas fitted I am just wondering if, to keep it simpler for me, I should think about getting a set of Hyde Peashooters which I like and have had on my Commandos. When reading the info on the Hyde site, they both seem to require the same set up so if my bike is set up for the Togas it, hopefully, would be a case of just swapping over.

    I am sure a number of silencers would fit, are there any type that anyone would recommend?, I don't want them too loud but a shape that would suit the bike. I like the Thruxton shaped ones and can get a pair of 2008/10 ones from a friend who no longer has his bike, there are adaptors that are available to let them fit the T100, but I take it the ECU would need tweaking.

    Thanks again
     
  5. Iceman

    Iceman Crème de la Crème

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    There are many aftermarket exhausts that do not require any re-mapping at all.
     
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  6. Iceman

    Iceman Crème de la Crème

    Apr 19, 2020
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    The Peashooters look lovely on a Bonneville. Speak with Arthur Macdonald at Moto Legends, he has owned Norman Hyde Ltd since Norman Hyde retired a few years ago. The Norman Hyde partnership still runs, selling his books. Arthur will confirm that fitting the Peashooter exhausts may give some popping on the overrun, but nothing detremental, personally I love that sound anyway. You could always send the ECU to a reputable tuner for a re-map, stating what mods have been done, and a new customised map can be installed. If you want to go that route them PM me, I can let you have details of an excellent specialist that can do it for you. You could ring him and have a chat, he is very bust however, it may take a few days for him to get back to you. Thinking about it, I seem to recall Joe fitted some to a bike he had a few years back, if he reads this he may be able to say how they performed for him.
     
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  7. pseudonym

    pseudonym New Member
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    Dec 22, 2025
    15
    3
    Glasgow
    That's an idea!, any pointers on what's likely to suit there's a good few out there?

    Thanks for your help especially regarding the ECU , I didn't know it could be done off the bike, I imagined it would have to be running for it to be tuned. I may indeed take you up on your kind offer and PM you for details.

    It may be a month or two before I have managed to get through everything that needs done on the bike as there is a fair bit of cleaning, changing bits etc. to get it to where I would like it to be.

    I think a bit of my problem with this is, as I mentioned, I am used to carbs where if I was changing silencers I would play about with some jets and do a plug chop or two if required, but in speaking to a couple of friends EFI is the preferred and best way to go, I'm sure once I get into the way of it I will be fine, "tune and forget" one said.

    The bike was one owner, low mileage, laid up and at a good price, it was one of those things where I think I would have been daft to ignore it.

    As I said, thank you very much to everybody for the help!!
     
  8. Iceman

    Iceman Crème de la Crème

    Apr 19, 2020
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    Any quality silencers will be fine. I would stay away from the cheap ones, but the Norman Hyde range is fantastic quality. Consider buying the Dealertool, it costs £65 and will enable you to do a fair amount service wise. Have a look at their website, all you need is a laptop running Windows 10 or 11 for it to function. The beauty with the Dealertool is it will not make any changes to your bike's ECU, in effect you can't mess anything up. Hopefully, your machine will be ready for the better weather.
     
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