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Warped front disc after 4000 miles |
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Birky_D
Moto GP Alien Joined: 03 Feb 2017 Location: Essex Status: Offline Points: 269 |
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Posted: 07 Jun 2017 at 23:27 |
Anyone else had issues with theirs? Had the brake pin on the master cylinder recall and all felt fine
Last week though I've gradually noticed it get worse I'm not sure if this is something I should call the shop for warranty. Surely a oem part like this shouldn't start warping after 6 months and so few miles? |
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Motocrosser from 1993-1999 & 2009-2014
Now just a keyboard warrior & road rider Follow me on YouTube for old races of me & current road/track https://www.youtube.com/c/DeanBirkumshaw |
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426hemi
Premium Member owner of the big bore! Joined: 30 Mar 2012 Location: cannock Status: Offline Points: 5676 |
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Had to have both front discs changed on my multistrada at 7000 miles.
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Zax
Premium Member Joined: 13 Jun 2008 Location: Abedeen / Oslo Status: Offline Points: 948 |
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have you checked that the bobbins on the disk are free ?
sometimes they can gum up or stick giving the feeling of a warp ?? |
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wilko
Premium Member Joined: 11 Feb 2008 Location: Stroud Status: Offline Points: 350 |
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Another possibility for brake pulsing is explained here (bit wordy but worth the read):
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Birky_D
Moto GP Alien Joined: 03 Feb 2017 Location: Essex Status: Offline Points: 269 |
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Thank you! That's a damn good link if a little lengthy I've learnt two things. The first is that I should try some garnet paper The second is that I need to upgrade the fluid as I've had brake fade on it before and it's not nice |
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Motocrosser from 1993-1999 & 2009-2014
Now just a keyboard warrior & road rider Follow me on YouTube for old races of me & current road/track https://www.youtube.com/c/DeanBirkumshaw |
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Spoonz
Admins Group Joined: 11 Feb 2008 Location: North Devon Status: Offline Points: 10726 |
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I had a vfr once that vibrated so bad under front brake use from speed that it blurred my vision. The dealer fitted 2 sets of discs and new wheel bearing etc etc under warranty. Turned out to be a cupped front tyre, new set of rubber and all good after that.
If there is no pulsing, just vibration it might not be the brakes.
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Birky_D
Moto GP Alien Joined: 03 Feb 2017 Location: Essex Status: Offline Points: 269 |
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I've got it booked in for its 6k service and do see if they can sort under warranty but I'll need to sort something before then to atleast improve it so smoothing any hot spots off is the plan
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Motocrosser from 1993-1999 & 2009-2014
Now just a keyboard warrior & road rider Follow me on YouTube for old races of me & current road/track https://www.youtube.com/c/DeanBirkumshaw |
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wilko
Premium Member Joined: 11 Feb 2008 Location: Stroud Status: Offline Points: 350 |
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Let me know how you get on with the smoothing bud please. Mine is pulsing slightly, I have some garnet paper ready, but haven't got round to sanding the discs yet.
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IanG
Premium Member Joined: 04 Oct 2010 Location: N Wales Status: Offline Points: 10725 |
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I always give my discs a good abrading before changing pads as it takes away all the transferred pad material,something you definitely need to do as a priority if changing pad make/composition The recommended tool is a rotary brush type thing along the lines of a honing tool but abrasive paper will do a similar job,just less easy and takes longer |
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www.apworkshops.co.uk
www.apriliaforum.co.uk www.apriliaownersclub.co.uk Looking forward to the next track day |
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426hemi
Premium Member owner of the big bore! Joined: 30 Mar 2012 Location: cannock Status: Offline Points: 5676 |
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I use one of these for cleaning the discs, there are cheaper alternatives but these work very well.
https://www.pacehigh.co.uk/flex-hone-for-rotors |
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IanG
Premium Member Joined: 04 Oct 2010 Location: N Wales Status: Offline Points: 10725 |
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That's the thing I was thinking about,I could only remember it was sort of brush like with abrasive balls on the end of wires
We use bottle brush type hones at work and that was clouding my memory |
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www.apworkshops.co.uk
www.apriliaforum.co.uk www.apriliaownersclub.co.uk Looking forward to the next track day |
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Birky_D
Moto GP Alien Joined: 03 Feb 2017 Location: Essex Status: Offline Points: 269 |
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Cheers guys... Huuuuge help
Looked at discs and I can see a part in each disc with black bits of the pad. I'm certain this is what's making the brake 'grab' and give me that pulse feeling so I'll order some up and sort once home |
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Motocrosser from 1993-1999 & 2009-2014
Now just a keyboard warrior & road rider Follow me on YouTube for old races of me & current road/track https://www.youtube.com/c/DeanBirkumshaw |
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Birky_D
Moto GP Alien Joined: 03 Feb 2017 Location: Essex Status: Offline Points: 269 |
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Update on this. Having done what I could with the discs then sending off to motoliner they are still no good
Bikes in for its 6k service in August so I'll be asking for a warranty replacement |
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Motocrosser from 1993-1999 & 2009-2014
Now just a keyboard warrior & road rider Follow me on YouTube for old races of me & current road/track https://www.youtube.com/c/DeanBirkumshaw |
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snowman
Premium Member Joined: 27 Oct 2010 Location: Romsey area Status: Offline Points: 1385 |
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Good luck
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Birky_D
Moto GP Alien Joined: 03 Feb 2017 Location: Essex Status: Offline Points: 269 |
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Quick update on this. My 'local' bike shop had the bike in for its 6k service and to check the disc issue
Called within a few days to say service done, bike cleaned and yes definitely an issue with discs. All done under warranty Now thats service!
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Motocrosser from 1993-1999 & 2009-2014
Now just a keyboard warrior & road rider Follow me on YouTube for old races of me & current road/track https://www.youtube.com/c/DeanBirkumshaw |
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flatlander
Premium Member Joined: 01 Mar 2012 Status: Offline Points: 1147 |
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Check the blackshadow site he has some good info that might help
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"Si me dices ven lo dejo todo ... pero dime ven"
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