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Thread: ST1300 - Photos of dismantled SMC

  1. #41
    Site Supporter MaxPete's Avatar
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    Re: ST1300 - Photos of dismantled SMC

    Excellent contribution John - many thanks for this fine report which will benefit a lot of ST Owners now and in the future.

    Pete
    The harder I work, the luckier I get.

  2. #42

    Re: ST1300 - Photos of dismantled SMC

    Quote Originally Posted by itsallabouthim View Post
    I went up to Honda dealer late last Friday afternoon. New service manager told me that his predecessor left for Christmas vacation and did not return. New manager did not know anything about problem. I showed him my bike sitting in the yard behind dealership. He would call Honda about it. Previous manager sent photos to Honda. They claim they never got them. After almost 8 weeks the ball is still not in motion. Have a happy new year.
    2nd Email sent, still standing by the white courtesy
    I may be able to explain your brake issues to you as far as what caused it, and how to fix it.
    Igofar

    (UPDATE)
    Contact has been made!
    Hold my beer, I got this
    Last edited by Igofar; 01-11-2018 at 03:26 PM.

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  4. #43
    Play it makes life fun STGUY's Avatar
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    Re: ST1300 - Photos of dismantled SMC

    Quote Originally Posted by PFD023 View Post
    My technical skills/knowledge pales in comparison to others in here but if the line burst/exploded with brake fluid boiling wouldn't that mean that something is causing the pressure to remain in the lines further upstream from the pads/pins etc in the rear?
    Boiling would mean moisture in it right?

    Sent from my SM-G920V using Tapatalk

  5. #44
    John Heath
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    Re: ST1300 - Photos of dismantled SMC

    Quote Originally Posted by STGUY View Post
    Boiling would mean moisture in it right?

    Sent from my SM-G920V using Tapatalk
    Probably - but not necessarily. DOT 4 will boil, (ie hot enough to turn to gas) but at a much higher temperature - 230 deg C ish, apparently when 'dry'. Over time it absorbs moisture and there is a %ge to indicate when it is wet Approx 4% I think, but google it for the correct value. Whatever it is, 'wet' DOT 4 like this will boil at a much lower temperature - around 155 deg C. They reckon that on average, 2 year old fluid will have this level of moisture absorption. Give it more time and it will absorb even more and the boiling point will get closer to that of water.

    This is one of the reasons that the recommended frequency for changing fluid is at least every 2 years. But the build up of moisture, crud and corrosion caused by water is, in my opinion, a much more compelling argument for changing it more frequently than that.

    But back to the question about the heated brakes - the heat build up is a symptom of the problem, it's not the problem itself - although once brakes get hot, fluid gets hot and expands and contributes to the problem. There has to be something that is preventing the pads from releasing - no pressure relief, stuck pistons, stuck smc bearings, too much slider pin grease, corrosion in master cylinder pistons, wrong size service kit .........etc. Or the rider is wearing larger boots than usual.

  6. #45
    Play it makes life fun STGUY's Avatar
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    Re: ST1300 - Photos of dismantled SMC

    Quote Originally Posted by jfheath View Post
    Probably - but not necessarily. DOT 4 will boil, (ie hot enough to turn to gas) but at a much higher temperature - 230 deg C ish, apparently when 'dry'. Over time it absorbs moisture and there is a %ge to indicate when it is wet Approx 4% I think, but google it for the correct value. Whatever it is, 'wet' DOT 4 like this will boil at a much lower temperature - around 155 deg C. They reckon that on average, 2 year old fluid will have this level of moisture absorption. Give it more time and it will absorb even more and the boiling point will get closer to that of water.

    This is one of the reasons that the recommended frequency for changing fluid is at least every 2 years. But the build up of moisture, crud and corrosion caused by water is, in my opinion, a much more compelling argument for changing it more frequently than that.

    But back to the question about the heated brakes - the heat build up is a symptom of the problem, it's not the problem itself - although once brakes get hot, fluid gets hot and expands and contributes to the problem. There has to be something that is preventing the pads from releasing - no pressure relief, stuck pistons, stuck smc bearings, too much slider pin grease, corrosion in master cylinder pistons, wrong size service kit .........etc. Or the rider is wearing larger boots than usual.
    My 84 Goldwing brakes are dragging and binding. I plan on getting an ultrasonic cleaner and cleaning and rebuilding everything I can. Already spent enough money at the dealer and nothing fixed.

    Sent from my SM-G920V using Tapatalk

  7. #46

    Re: ST1300 - Photos of dismantled SMC

    Houston we have contact....hold my beer, I got this
    We may need some assistance in the inspection/repair/bleeding from someone who lives either in Florida, or in a nearby state
    We will have more information tomorrow.
    Thanks for any help from the locals in this matter.
    Igofar

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