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  1. #1
    Member

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    Join Date
    Apr 2014
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    63

    Default Exhaust leak at y-pipe

    I've got an exhaust leak where the rear exhaust stuffs into the y-pipe in my 2-into-1 setup. I've tried using high temp rtv, extreme heat jb weld (rated for 1000 degrees F), and fiberfix heat wrap but they have all failed within minutes of the bike running. I'm wondering how you guys with old knuckle, pan, or shovel setups seal your y-pipe connections? A regular exhaust clamp will not work in my case since the opening in the y-pipe is old and sort of oblong now with about a 1/8" gap on one side when fitted (the leak I'm trying to seal). Any ideas?

  2. #2
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    May 2018
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    I'd try to use a pipe expander to get it back to its original, round shape. They have a larger version too, not sure what diameter you are dealing with.

    https://www.harborfreight.com/medium...58589d6023a0c2

  3. #3

    Join Date
    Mar 2022
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    128

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    a pic would help

  4. #4

    Join Date
    Sep 2017
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    463

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    If you are looking for goop to try and fix it, try Pyro putty, with stands pretty high temps not sure about 1/8 gap. but should hold under exhaust temp gases.Also seen on the english guys tv Dealer Wheelers ,exhaust joint paste. looked it up and found some in the US but dont remember who. Maybe shim up the gap with a beer can before goop? Also check out panhead pipes to head fixes/recommendations as they are usually loose also.
    Last edited by flatman; 05-17-2022 at 8:18 PM.

  5. #5
    Senior Member

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    Oct 2012
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    The old standard before they were valuable antiques and were still cheap old bikes was honey they just kept putting a little in the gap running until it turned black and eventually the leak was full of carbon.
    Dusty

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