88 GS Exhaust

Discussion in 'Airheads' started by seasider, Apr 21, 2014.

  1. seasider

    seasider Just a rider

    Joined:
    Oct 27, 2007
    Oddometer:
    716
    Location:
    Virginia
    Recently purchased an 88 Bumble Bee that came equiped with a full stainless Super Trapp system made specifically for the bike. Fits perfect.
    Being completely new to airhead ownership and characteristics (Super Trapp as well) I am learning as I go but have made up my mind that the exhaust is louder than I prefer for my local joy rides on this baby.
    Any suggestions for a replacement silencer or even entire system? Mine currently offered in the FM parts section for trade.
    http://www.advrider.com/forums/showthread.php?t=971924

    For the record I have looked at the use of a stock silencer (Thanks Stagehand :clap I will get it back to you:cry) but too much mod to make it happen off the Super Trapp 2-1/8" OD two into one y pipe if that is to stay.

    I appreciate any help this forum can bring.
    Thanks.
    #1
  2. Mark Manley

    Mark Manley Long timer

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    I have Keihan on both my 80GS and G/S, they are replicas of the original systems although the collector box on the GS system is replaced with a Y piece which some people say changes the power characteristics slightly, I hardly notice the difference. They have a slightly different note to the standard system but come with a 10 year guarantee and can be polished to look as good as new when they tarnish. I have had them on my bikes for over 10 years and would recommend them.

    http://www.keihan.co.uk/catalogue.html
    #2
  3. seasider

    seasider Just a rider

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    Mark, very helpful thanks! Do you know from experience if I could get by with rhe silencer and Y pipe connecting up to my standard exhaust?
    I will check with them as well. This is a great start. Thanks again.
    #3
  4. Mark Manley

    Mark Manley Long timer

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    All parts are interchangeable with the standard system, I mixed them together on mine before replacing the entire system but whether they are with a Supertrapp system is a different matter, I would check with Keihan first.
    #4
  5. seasider

    seasider Just a rider

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    Y pipe ordered and waiting fot the June batch of silencers. Thanks again :D
    #5
  6. Mobiker

    Mobiker Long timer

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    Does Keihan have a US distributor or is it being shipped from the UK? How much was shipping?
    #6
  7. Beemerguru

    Beemerguru Beemerguru...G/S guy

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    Too loud...is the internal baffle still in the end of the muffler? It's held in by a set screw.

    If you have a complete Staintune, I have an excellent stock GS system for trade.
    #7
  8. Wirespokes

    Wirespokes Beemerholics Anonymous

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    Jackson's Bottom Oregon
    The supertrapp can be made quieter by removing some of the discs and repacking the muffler. Mine came with six discs and it's now down to three. It's much quieter, though not as quiet as the stock system. But it is acceptable.

    I've been told by a few of the airhead experts that I should ditch the supertrapp and get a stock system or one of the close reproductions, like Keihan and it'll run much better. But I have no complaints with power, only poor fuel mileage.
    #8
  9. seasider

    seasider Just a rider

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    The bike runs great with the super trapp but I am just looking for stock for more relaxed cruising. Power wise I wouldnt know the difference as this is the only airhead I have ever owned and ridden..........I like it:clap
    #9
  10. motu

    motu Loose Pre Unit

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    New Zealand
    3 discs...what size Supertrapp? I have a thread here about my R65, as you can see, I do a bit of playing around with exhausts.
    http://www.advrider.com/forums/showthread.php?t=791030

    On my open road commute I'm mostly sitting on 4,000 to 4,500rpm, that obviously shows up the hole in the bottom end, and increased fuel economy. I don't have to rejet with the Supertrapp, and retain good power and economy. currently on 7 discs, I'll be on 6 next tank of fuel. It's noisy, but quieter than the short megas, which everyone seems to like.
    #10