popping and banging on over run...

Discussion in 'Speed Triple' started by stu3y, Oct 2, 2015.

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  1. stu3y

    stu3y New Member

    Sep 27, 2015
    0
    1
    teesside
    I see alot of people with after market exhausts say their bikes pop and bang like mad... ive just bought a speed triple and ive not once heard any banging and popping from the exhaust... each to their own but i quite like it when they pop and burble on over run.. any ideas why this one dosent?
     
  2. thebiglad

    thebiglad Old fart, still riding !

    Sep 25, 2013
    5,064
    1,000
    Central France
    You don't give much info about your bike so it's difficult to say, but my guess would be that a previous owner removed the AI system - which is the usual cause for noise on over-run.
     
  3. Tigcraft

    Tigcraft Unheard of Member

    Mar 29, 2014
    2,565
    800
    Holmfirth West Yorkshire
    As big lad said.
    Popping can be achieved if you've a loose header or a minute rust pinhole on old exhausts coming near from the start of the down pipes.
     
  4. stu3y

    stu3y New Member

    Sep 27, 2015
    0
    1
    teesside
    ive just checked the AI system its all in tack, no blank plates, solenoid still plugged in etc, i unplugged the solenoid and tried it, it pops and bangs like a good'un, but obv no good as it makes the engine management light come on.

    bike is a 2005 model, has an aftermarket single 3-1 can and pipercross filter
     
  5. crispey

    crispey crispey creme de la creme

    Nov 6, 2014
    7,194
    1,000
    Uk
    Look at tuneecu download for your model, if there, and you have the ability to "turn off" AI which will sort your eml. You're not reloading your map just unticking a box.
     
  6. JayJay

    JayJay Member

    Jul 21, 2015
    43
    18
    Essex
    mines sounds like WW2 :p
     
    • Like Like x 2
  7. thebiglad

    thebiglad Old fart, still riding !

    Sep 25, 2013
    5,064
    1,000
    Central France
    That's because if you unplug the solenoid, the AI is fully open, permanently!

    The solenoid works by voltage from the ECU closing (rather than opening) it, when not required - which is a large portion of riding conditions.
     
  8. stu3y

    stu3y New Member

    Sep 27, 2015
    0
    1
    teesside
    will it have any bad effects having the solenoid permanently open?
     
  9. thebiglad

    thebiglad Old fart, still riding !

    Sep 25, 2013
    5,064
    1,000
    Central France
    Well it's not designed to work that way so there's a danger it will overheat the headers and it might affect the fuelling trims managed by the O² sensors.

    Basically it's not good.
     
  10. stu3y

    stu3y New Member

    Sep 27, 2015
    0
    1
    teesside

    what have you done for it to be like that?
    mile dosent make even the slightest pop with the sai plugged in
     
  11. Dickie

    Dickie Active Member

    Jun 8, 2016
    122
    43
    Tadcaster, North Yorks
    I've just collected a 2015 1,725m Speed Triple R with the Arrow high cans & the bike pops & gargles on over run all the time - I assume this is normal with Arrow cans?
     
  12. Col_C

    Col_C I can't re...Member

    Aug 5, 2015
    1,433
    800
    Cornwall
    Welcome Dickie.
    Yep, perfectly normal. Most like it (me included), a few find it irritating.
    Likely yours has been dealer fitted, but might be worth just checking with your dealer that the map has been changed to suit.
     
  13. Dickie

    Dickie Active Member

    Jun 8, 2016
    122
    43
    Tadcaster, North Yorks
    Thanks Col, I'll do that.
    I was intending to email them anyway - the bike has come with two Triumph Diagnostic Tool - Autoscan Reports, one at 1 mile & one at 426 miles, & both say 'Fail' Throttles unbalanced - to ask if they were balanced after the report.
     
  14. Col_C

    Col_C I can't re...Member

    Aug 5, 2015
    1,433
    800
    Cornwall
    The burbling/popping is caused by SAI (secondary air injection), which I believe is there to remove unburnt fuel in the exhaust gases. If the sound annoys it can be stopped by disabling the SAI valve (and blocking the hose).
     
  15. Havit

    Havit Admin
    Staff Member Subscriber

    Jul 17, 2015
    9,567
    1,000
    Kent
    The poping and banging as you call it is to do with left over gasses being burned off , bit like when you eat beans :D:D
     
  16. Havit

    Havit Admin
    Staff Member Subscriber

    Jul 17, 2015
    9,567
    1,000
    Kent
    My t bird used to do it when i first got her, i found out after a strip it was caused by a diaphragm in the carb having a hole. I replaced it and it never done it again, like you i liked the burble and popping .
     
  17. Odo

    Odo Member

    Oct 18, 2018
    30
    13
    Liverpool
    I fancy a Speed Triple but not the pop & bang, do they do it in standard trim?
     
  18. Odo

    Odo Member

    Oct 18, 2018
    30
    13
    Liverpool
    I fancy a Speed Triple but not the pop & bang, do they do it in standard trim?
     
  19. Havit

    Havit Admin
    Staff Member Subscriber

    Jul 17, 2015
    9,567
    1,000
    Kent
    Me too . pen does it all the time . its only burning off excess fuel. Love it
     
    • Like Like x 1
  20. Yorkshireman

    Yorkshireman Crème de la Crème

    Dec 12, 2015
    3,401
    1,000
    Barnsley
    Yes it’s the SAI system injecting air into the exhaust to burn any unburnt fuel before it gets to the cat.
    It can be disabled with Tunecu and blanking the SAI valves on top of the cylinder head, no more poppy bangy :eek:
     
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