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  1. MoT Failure? 
    #1
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    A few weeks ago, I pulled the VFR out of hibernation and would appear I didn't clean it well enough. The front brakes were essentially seized. I've since managed to free things up, removed the calipers, allowed the pistons to come out a bit and given everthing a good clean up with some brake cleaning fluid, scrub with toothbrush, etc. All appears well again, bike stops as it should etc, however, on closer inspection it would appear one of the front discs didn't take too kindly being mated to the disc over the period and is pitted in one small area. See the attached thumbnail.

    Would this get through an MoT? - obviously I think I'm going to have to replace it at some point, but on reading up on MoT specs would suggest pitting would not fail an MoT, only if the disc is considered structurally compromised. However, piece of mind and all that but at £120 per disc I'm somewhat annoyed at myself.

    Thoughts?

    Pete
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  2.  
    #2
    Platinum Member Burbler's Avatar
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    Brake disc scoring, pitting or wear is a possible failure. In the eye of the beholder I suppose.

    Don't know the guide lines but suck it and see. Be prepared for a walletodectomy.
    I only have one vice…I lie.
     
     

  3.  
    #3
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    Iv had a lot worse pass with no advisories but then with bits like that it really does seem to depend on wether the tester is in a good mood or not. Personally though with that tiny bit of pitting on an otherwise healthy disc if it failed I'd argue the toss as realistically it wouldn't make any difference to the bikes stopping ability.
     
     

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    #4
    Diamond Member DC's Avatar
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    l. an excessively scored, excessively pitted orexcessively worn brake disc . Section 3.2 L Stated in the Mot Inspection Manual . By my understanding if that amount of pitting doesn't affect the brake's performance , which it shouldn't , it'll be okay . But then I'm not an MOT inspector . Could you send that image to your inspector and ask them .
     
     

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    #5
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    I appreciate the responses. It's not due until end of July, so I'll try and enjoy it (if it stops raining) and possibly start saving - hopefully it'll be ok.

    Pete
     
     

  6.  
    #6
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    I concur with t’others

    Might well be ok as it doesn’t look too bad.
    Everything else is shyte
     
     

  7.  
    #7
    Diamond Member DC's Avatar
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    Quote Originally Posted by fragglepete View Post
    I appreciate the responses. It's not due until end of July, so I'll try and enjoy it (if it stops raining) and possibly start saving - hopefully it'll be ok.

    Pete
    By the end of July ( If this weather gives us a break ! ) you'll have shaved a few microns off that disc , diminishing the current state of that pitting slightly , just make sure you keep that disc well greased up to prevent further corrosion .................
     
     

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    #8
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    Quote Originally Posted by DC View Post
    By the end of July ( If this weather gives us a break ! ) you'll have shaved a few microns off that disc , diminishing the current state of that pitting slightly , just make sure you keep that disc well greased up to prevent further corrosion .................
    Yeah I alway put a good coating of copper grease in my discs to keep them from wearing or sticking .
    (Legal disclaimer: this is a JOKE. Do not repeat DO NOT do it, just say NO).
    seriously though put few hundred miles on the bike before July and brake heavier than noramal and what pitting isn't worn down will get filled with brake dust, doubt it'll be noticeable.
     
     

  9.  
    #9
    Diamond Member Wes's Avatar
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    I've had that happen to me as well, was quite a bit worse tho, made the braking really judder as it kept biting more on the pitted area. Just go with it and see if it sorts itself out.
     
     

  10.  
    #10
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    Well.... today the bike went in for it's MoT…. the result.... Passed with No Advisories!!!!

    Fun meter stays pegged to high for the duration of the Summer!

    Time to start buying in stuff for it's service next month.

    Pete
     
     

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