This topic contains 2 replies, has 2 voices, and was last updated by  David W 7 months ago.

  • Author
  • #2329

    ♠️ MARCEL
    • Topics: 32
    • Replies: 195
    Nov 24, 2018
    North UK
    Points: 2,576

    Hi, I have 2011 GV Aquila 250 efi with single silencer, would it be ok to swap to twin silencers or would it cause a problem for the efi system?

    The trouble with the EFI hyosungs is they don’t take kindly on pipe changes, as a few owners can also atest to that.

    The trouble is with the Lambda sensor that’s inside the pipe which senses gases going past it, it will trigger the ecu to either intervene in the fueling process or dash throws an error.

    You may get away, with keeping the 2-in-1 stock system (best for performance wise)   and then expanding the and can hole  (make it bigger at the exit, about 5-10p size max)

    The other problem is the end can itself. this would be looking at making sure the end can is as long or little shorter than the stock can and must have a baffle with a hole of a 2p size or less.

    I hope this info helps!

    // Meditation doesn't mean you have to sit still....

  • #2331

    David W
    • Topics: 3
    • Replies: 3
    Nov 24, 2018
    GV250 Aquila
    Points: 59

    Thanks Marcel,  I will leave it as is, I was not after a louder exhaust just prefer the look of twin pipes but not worth upsetting the lambda sensor and the fueling problems that may ensue.

    Best regards David W

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