Author [NL] [FR] [ES] [DE] [SE] [IT] Topic: Warped Disks  (Read 1203 times)

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  • Offline jimxlhr8   nz

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    Offline jimxlhr8

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    Warped Disks
    on: Sep 03, 2021, 10.20 am
    Sep 03, 2021, 10.20 am
    Is disk warping still an issue?
    Did someone find out the actual cause or a simple solution?

    Being new to this forum I have some thoughts and observations.....

    I currently ride a 2017 Tiger Sport (never released in the US) and like the Trophy, UK assembled.
    I had the same issue with the disks on that bike.
    Triumph replaced the disks and pads under warranty twice.
    The last set was replaced close to the end of my 2 year warranty and so I immediately changed the pads from OEM to EBC HH as soon as I got home from the new disks and pads being fitted.

    Its been 2 years now and another 45,000k and I have had ZERO issues since fitting the EBC HH pads. Which have a better initial bite than the stockers anyway.

    I have concluded from my experience and others who went down the same path (with the Tiger Sport)
    That the stock front pads and disks combo do not work well together - especially if you are a smooth rider and don't use the brakes hard.

    I wonder if a change to EBC-HH pads on a non-warped disk Trophy may prevent the issue ever appearing?

    Food for thought...........

  • Offline digital   es

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    Offline digital

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    Re: Warped Disks
    Reply #1 on: Sep 03, 2021, 09.27 pm
    Sep 03, 2021, 09.27 pm
    Obviously the EBC HH brake pads work very well and have a good grip on the brake disc.

    But that does not mean that the EBC HH. They cannot deform the brake discs.

    It all depends a lot on the state in which the brake calipers are, if the pistons do not return correctly, this will cause the brake discs to heat up and therefore over time, you will have a deformation of the brake discs.

    It is good to periodically check the condition of the brake calipers, as well as the brake pads and their pistons.

    If we place the central stand and lift the front and rear wheels, we turn the tire with our hands, we will see if the tire turns very braked.

    When I travel and stop to refuel or drink coffee, I have a habit of checking the brake discs if they are hot.
    Only motorcyclists know why dogs stick their head out the car window.


  • Offline Maca

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    Offline Maca

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    Re: Warped Disks
    Reply #2 on: Sep 08, 2021, 03.08 pm
    Sep 08, 2021, 03.08 pm
    I recently noticed very small vibration when braking and this quickly (within 100 miles of riding) became quite a bad judder under braking.  Checked the bobbins and the right disc bobbins were all solid, left disc bobbins were not as bad, some seized and some free.  Cleaned them all out and the judder wasn't as bad but was still quite bad.

    Borrowed a dial indicator and checked the runout, expecting the right disc to be the problem but it came in at 0.09mm.  The left one was 0.28mm.  Max runout is 0.15mm.  My theory, and it is only my speculation is that the left disc was held firm with the seized bobbins for only half the circumference so under braking the disc was flexing and heating up.  The right one was fixed all round and while it may not have been completely in the right position it was evenly loaded and hence didn't flex. 

    I've got new discs and pads, swapping to EBC discs and pads because that is what was available at sportsbikeshop.co.uk but I also have a question.  What is the torque for the rotor bolts and what thread lock is recommended?  Can't seem to find anything on the spec sheet.

  • Offline Coconut   gb

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    Offline Coconut

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    Re: Warped Disks
    Reply #3 on: Sep 08, 2021, 05.34 pm
    Sep 08, 2021, 05.34 pm
    What is the torque for the rotor bolts and what thread lock is recommended? 
    Can't seem to find anything on the spec sheet.

    22NM - Note that it's NM and NOT lb/ft !

    New Bolts are called for, and if required they will have thread locking compound
    already applied to them.  Part Number : T2020609 - 10 required !

    ( My updated version of the Trophy Parts List, in Excel Spreadsheet format,
    and including a few alternative parts, can be found in this Topic :

    Spare Parts List.

    There's also a downloadable List in either "word" or ".pdf" format
    that I compiled from the information contained in the Service Manual
    of all the Torque figures for the Trophy, here :

    Servicing Data, Reference Info. & DTC ( Fault ) Codes -

    Scroll to the Post dated Sept 5th 2016, titled,
    "Triumph Trophy & Trophy SE ( 2012 on ) Torque Values" and you'll find it there.  :028:

    Cheers  :821:




  • Offline Maca

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    Offline Maca

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    Re: Warped Disks
    Reply #4 on: Sep 08, 2021, 06.10 pm
    Sep 08, 2021, 06.10 pm
    Thanks Coconut, don't know why but I can't get the links to work. Can you recommend a vendor for the rotor bolts? 

  • Offline Coconut   gb

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    Offline Coconut

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    Re: Warped Disks
    Reply #5 on: Sep 08, 2021, 07.39 pm
    Sep 08, 2021, 07.39 pm
    I have no idea why the Links don't work for you !

    If you use the Search Button from the Main Menu Bar
    you should be able to find the Spare Parts List Topic by searching for
    "Spare parts List", and for the Torque Values Topic - just open up
    the second "Sticky" Topic in the main Maintenance, Servicing, and Mechanical Issues
    Section of the Forum, titled, "Servicing Data, Reference Info. & DTC ( Fault ) Codes."

    Meanwhile, if you want genuine OEM Bolts, then they are available via any official Triumph Dealer,
    including On-Line from "World of Triumph"

    You may want to look at these though as they work out at 30.00 with Free UK Postage,
    compared to around 80.00 + Postage or collection for OEM :

    Grade 5 Titanium Brake disc bolts, equivalent to T20206096, from Titan Classics
    ( Titanclassics.com if that Link doesn't work for you either ! ), though I would enquire with them
    about the tightening Torque for them, due to the different material from OEM.

    ( I have no experience of using them and have no connection or affiliation to the Seller -
    I just found the product by conducting a "Google" search ).

    Cheers  :821:




  • Offline sin_tiger   gb

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    Offline sin_tiger

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    Re: Warped Disks
    Reply #6 on: Sep 09, 2021, 12.37 am
    Sep 09, 2021, 12.37 am
    TitanClassics has a good reputation from a couple of friends who've used his fasteners, that's 2nd hand as I haven't myself as yet.

    Often aftermarket bolts don't have pre applied locking compound. Use "Loctite Blue 243" or equivalent, two drops only on the thread which is plenty. DO NOT use red thread lock fluid.

    Recommended torques should be fine with G5 titanium fasteners as the tensile strength is higher.

  • Offline Maca

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    Offline Maca

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    Re: Warped Disks
    Reply #7 on: Sep 09, 2021, 08.29 am
    Sep 09, 2021, 08.29 am
    Sorry for hijacking the post but thank you everyone, new bolts on order.  Discs have been delayed so no reason not to wait for new bolts too.