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XJ900F manifold exhaust collets - really necessary?

Discussion in 'XJ Technical Chat' started by AliMac, Jul 12, 2018.

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  1. AliMac

    AliMac New Member

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    Hi all - this may be a daft question, but I gotta ask it to keep my mind at ease :)
    Ok... I’m in the middle of restoring an Xj900f (‘94)... it had a vgc Jama stainless exhaust... however the twin collets on each of the down pipes are perished and will need replacing.
    Ok, so here’s the question: when I put it all back together (with new flange gaskets of course), do I really need to use the collets? Exactly what is their purpose? If your replies suggest they are a necessity, can anyone recommend a good source?
    Thanks in advance
    Ps - will try to upload a few pics too...
     

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    AliMac, Jul 12, 2018
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  2. Toomanybikes

    Toomanybikes Well-Known Member

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    Without them the flange May bottom out against the head and may not seal the exhaust.
     
    Toomanybikes, Jul 12, 2018
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  3. AliMac

    AliMac New Member

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    Ah yes, upon closer inspection I can see how the collets will help to keep the pipe central to the flange / manifold port. Thank you
     
    AliMac, Jul 12, 2018
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  4. Toomanybikes

    Toomanybikes Well-Known Member

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    Now as for your need for new ones may other makers have similar parts. One that come to mind is 85-89 zx750 uses ones that I’ll bet will fit.
     

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    Toomanybikes, Jul 12, 2018
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  5. AliMac

    AliMac New Member

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    Many thanks TooManyBikes - I’ll check em out
     
    AliMac, Jul 12, 2018
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