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V7 racer

Discussion in 'V7/V85/V9 Chat & Tech' started by oscar varghese, Jul 12, 2019.

  1. oscar varghese

    oscar varghese Just got it firing!

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    Good day everyone! im new out here! Thanks for having me...

    I just built a custom v7 racer and wanted some advice. (Its my first time working on a moto guzzi) We fitted a nice short exhaust and the bike started to back fire. Looks cool! but has become annoying and we dont want to destroy the engine!

    i wanted to know what are the alternatives to getting the bike to run good without the backfire. I fit the exhaust with the oem catalytic converter to help reduce the sound and stop from losing too much pressure.

    The owner is against getting a tuning module and says the exhaust isnt fitted properly causing it to backfire but there are no leaks from the exhaust.

    The air filter is oem.
    Any and all advice will be appreciated.
     
  2. Mayakovski

    Mayakovski High Miler GT Famiglia

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  3. oscar varghese

    oscar varghese Just got it firing!

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    Thanks for the quick reply! much appreciated but as i mentioned above, the owner is not interested in adding a tuner or flash to the bike. Hes asked me to find an alternative solution to getting a tune and to check what the reason for the backfire could be. Has anyone had this happen when changing the exhaust?
    Pic of the pipes

    WhatsApp Image 2019-07-12 at 22.06.32.jpeg
     
  4. Mayakovski

    Mayakovski High Miler GT Famiglia

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    New pipes need new fuel map, simple as that. If the owner wants it to run great, that is the fix.
     
  5. My name is Jeff

    My name is Jeff Cruisin' Guzzisti

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    REMAP!
    Maybe the owner doesn’t want to pay you so he’s going to use this as his way
    Out.
     
    Mayakovski likes this.
  6. Trout

    Trout GT Reference

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    Agree with all comments above.

    Explain to the owner that it is his bike & he can do what he wants but it is not going to run correctly without re-mapping.
    Might suggest he join this forum & does a bit of research there are pages of documentation on it.

    If you are getting paid to do this job I suggest you bail out as soon as possible or the bike & owner will haunt you.
     
  7. GTM®

    GTM® Administrator Staff Member GT di Razza Pura

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    I don't see any 02-sensor/lambdas, and Guzzis run best with the balance pipe between sides. I know mostly people do things like this for looks only, so your customer likely doesn't care about running (damage to their engine) or performance. That flame = CRITICALLY LEAN.
    No "module" is available for 2013+ V7s, only an ECU flash. I have a solution for you linked above, or there are other DIY solutions that take immense time and risk (which I do not allow postings on here, sorry)... so up to your customer in the end. Tell them; Spend a little now, or a LOT later. ;)
     
    john zibell and Mayakovski like this.
  8. oscar varghese

    oscar varghese Just got it firing!

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    thank you all for the info... this is the v7 racer 2009..
    it has dual pipes but the other can cant be seen in the pic above.
    How do i get in touch with Todd?
    Do i need the power commander as well? or will the flash tool do the trick?
    Where does the flash tool ship from?
    sorry for all the rookie questions :angel:
     
  9. tonUPRacer

    tonUPRacer Cruisin' Guzzisti GT Contributor

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    We are Todd. Just kidding, he's the guy replying to your questions, GT-Rx look above and all shall be revealed.
     
    Mayakovski likes this.
  10. oscar varghese

    oscar varghese Just got it firing!

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    Hahaha! I see I’ve entered Area 51!!
    Thanks for all the info!
     
  11. Mayakovski

    Mayakovski High Miler GT Famiglia

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    I want a t-shirt that says:
    GT-Rx: I am Todd!
     
    tonUPRacer likes this.

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