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Thread: Hyosung GV250 exhaust modification

  1. #1
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    Hyosung GV250 exhaust modification

    We heard about the silencers being removed from the exhuast of the GV and my Girlfriend wanted it done to her bike. So after the 1,000 km service I got to work removing the end rivets which mount the silencers inside the exhuasts.

    I'm not going to go into depth about what I did, however here are some pictures which explain it more easily than words could.

    But in a nutshell:

    • You'll need a drill with a 4 - 4.5 drill piece
    • Pliers to pull the silencer out
    • And a magnetic tipped screw driver


    1. Drill the center of each rivet until you go all the way though
    2. Once drilled, pull the silencer out with the pliers, with a little bit of force
    3. If it doesn't come out easily, try drilling the hole a little wider with a bigger drill piece
    4. Once the silencer is out, use the magnetic tip screw driver to remove any shavings from inside the exhuast
    5. Also use the screw driver to remove the other end of the rivets which will also be inside the exhuast


    Don't worry about the shavings and rivet pieces falling deep inside the exhuast. There is a second plate about 3 - 4 inches in which prevents this.

    2MB WMV before and after videos to follow...
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  2. #2
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    Before and After Videos

    Before and After in WMV format and approximately 2MB in size.

    As you can hear from the before video, the exhuast silencers do their job quite well. In the after video it sounds a bit more throaty but the recording quality doesn't provide a true impression.

    The result, it definitely sounds nice around town, not loud but not so quiet either. At open road speeds you'll definitely want to be wearing ear plugs or the right ear drum can get a little tingly.

    I'm not really into loud bikes, but this modification gives the bike a bit more character and it sounds good without being too loud.

    And a picture of my little helper
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  3. #3
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    Quote Originally Posted by SwanTiger View Post
    And a picture of my little helper
    Cute


  4. #4
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    Did you have to re jet it or not ?

  5. #5
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    2nd April 2005 - 11:58
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    You could have cut the shitty bit off and replaced it - with a real bike!!

    20th innit....
    They shall not grow old as we that are left grow old.
    Age shall not weary them nor the years condemn.
    At the going down of the sun and in the evening,
    we will remember them

  6. #6
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    21st August 2011 - 14:52
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    Quick question re exhaust mod

    Hi, great post. Can you tell me, is there any impact on performance like when you mod a car exhaust? I've got an 09 gv250 and have been thinking about doing this. Any feedback would be much appreciated.
    Cheers
    D

  7. #7
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    Quote Originally Posted by Dangsta View Post
    Hi, great post. Can you tell me, is there any impact on performance like when you mod a car exhaust? I've got an 09 gv250 and have been thinking about doing this. Any feedback would be much appreciated.
    Cheers
    D
    I doubt if he did a dyno test before/after ... and may only be relying on ... sorta feels different ...better ... maybe ...

    I'm guessing two things may be lost ... horsepower (untill re-jetted ... and 1/2 a horsepower at the most) and in a month or so ... HER hearing ...

    It will be interesting to see how long before she's stopped by plod for "operating a noisey vehicle" ...
    Sweat wipes off. Road-rash doesn't.

  8. #8
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    Quote Originally Posted by SwanTiger View Post
    But in a nutshell:
    What ... no Youtube links ... ???

    Did you check to see if your "mod's" would void the Warranty on HER bike ... ???
    Sweat wipes off. Road-rash doesn't.

  9. #9
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    Quote Originally Posted by FJRider View Post
    What ... no Youtube links ... ???

    Did you check to see if your "mod's" would void the Warranty on HER bike ... ???
    LOL!

    Fuck your on FIRE tonight!

  10. #10
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    Quote Originally Posted by FJRider View Post
    ...Did you check to see if your "mod's" would void the Warranty on HER bike ... ???
    Five years down the track - does it fucking matter...?
    Can I believe the magic of your size... (The Shirelles)

  11. #11
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    Quote Originally Posted by Virago View Post
    Five years down the track - does it fucking matter...?
    Note to self ... check OP dates more often ...
    Sweat wipes off. Road-rash doesn't.

  12. #12
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    7th May 2010 - 19:43
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    Woah, what a dredge


  13. #13
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    Thumbs up awesome

    im gonna try this tomorrow,hopefully it is easy and i can rivet them back in when i go to get a WOF next month

  14. #14
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    Quote Originally Posted by jason123 View Post
    im gonna try this tomorrow,hopefully it is easy and i can rivet them back in when i go to get a WOF next month

    How'd you go mate?

  15. #15
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    I did it on my Hyosung GV250, Intruder clone, and never had a problem getting a WOF.
    There are two songs, "Stairway to Heaven" and "Highway to Hell" which I think give an indication of expected traffic flow

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