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Is this a stock muffler?

Discussion in 'XJ Technical Chat' started by macnifico, May 20, 2009.

  1. macnifico

    macnifico Member

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    Hi again!

    Yesterday I noticed (duh!) that the muffler of my XJ750 says "SuperTrapp".
    My question: Is this an aftermaket addition by the PO, or is this the stock muffler for this '81 Yamaha?



    [​IMG]



    [​IMG]





    Anyway, it does sound great, a low, throatty (spelling?) sound.
    Thank you for your help.
    Saludos desde Reynosa.
    macnifico
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    macnifico, May 20, 2009
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  2. Tiny

    Tiny Member

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    Not stock.
     
    Tiny, May 20, 2009
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  3. macnifico

    macnifico Member

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    Thank you! I'll try to find more about it, but if anybody knows something about this, please post it here.
    The 4 exhausts of the XJ750 Seca go to this, just one, muffler. Most photos I've seen show one muffler (Is this the right term?) at each side of the motorcycle.
    Saludos desde Reynosa, Tamaulipas, Mexico.
    macnifico
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    macnifico, May 20, 2009
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  4. TIMEtoRIDE

    TIMEtoRIDE Active Member

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    On a Supertrapp muffler, if you remove some end discs you make it quieter- - add discs makes it louder.

    See if a magnet sticks to the muffler can, that looks like stainless.
    That's a quality, tune-able muffler ya got there.
     
    TIMEtoRIDE, May 20, 2009
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  5. WesleyJN1975

    WesleyJN1975 Member

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    I agree. That's a good muffler. 4-2 was the stock exhaust set up on these bikes and 4-1 like you have was done for performance and to cut the total bike weight a bit.
     
    WesleyJN1975, May 20, 2009
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  6. macnifico

    macnifico Member

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    Thank you for your posts.
    I tried the magnet bit, and it sticks in the end of the muffler, from about 1 or 2 inches of the end, but NOT in the body itself. NOT where it says Supertrupp.
    As I wrote before, the motorcycle has a nice deep, rumbling sound.
    Saludos desde Reynosa, Tamps., Mexico.
    macnifico
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    macnifico, May 20, 2009
    #6

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