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dave001
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Joined: 22 Nov 2022
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PostPosted: 14:01 - 28 Jan 2023    Post subject: mt10 rear brake Reply with quote

had a weird one to day aint been out on bike for a few weeks while ice was about

decided to have a ride to day been riding about a hour and a bit stoped at lights and l had a compleat loss of rear brake presure

no loss of fluid get up the road somewher i can pull in give 3 pumps and have a look got a slite drag what want ther before so it will need looking

but cant get to repeat drag will just caliper be shited up


but tottal of loss of pressure is werid

pinhole sucking air maybe or stuck mater cylinder pistion that freed its self

any ideas?

the slite drag has seemed to prity my freed itself just hopingg it heat disk to much
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Easy-X
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PostPosted: 15:52 - 28 Jan 2023    Post subject: Reply with quote

There's not really much to brakes, small piston pumps fluid to another piston. Assuming you don't have some linkage problem (should be pretty obvious) then either the master cylinder is pumping fluid but it's going elsewhere, maybe a leak or a ballooning brake pipe, or it's not pumping fluid in which case it needs a rebuild or replacement.
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dave001
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PostPosted: 23:05 - 28 Jan 2023    Post subject: Reply with quote

Easy-X wrote:
There's not really much to brakes, small piston pumps fluid to another piston. Assuming you don't have some linkage problem (should be pretty obvious) then either the master cylinder is pumping fluid but it's going elsewhere, maybe a leak or a ballooning brake pipe, or it's not pumping fluid in which case it needs a rebuild or replacement.


thats was my point It was odd pipe is fine had pressure then sudden lost all presure

then full presure was back and no loss after that
linkage is fine and no leaks it a 2019

never seen anything like it before
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Easy-X
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PostPosted: 23:55 - 28 Jan 2023    Post subject: Reply with quote

Intermittent problem... maybe some grit in the system?
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dave001
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PostPosted: 00:44 - 29 Jan 2023    Post subject: Reply with quote

Easy-X wrote:
Intermittent problem... maybe some grit in the system?


dont know I cant see it anything in there itsd not been opened

im wondering if somehow its letting air in may in master cyclider or rather did


but I cant get the fault to repeat pads are low so i guess ill pull the whole caliper and clean it all and rebuid mater cylinder if need
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Copycat73
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PostPosted: 17:32 - 29 Jan 2023    Post subject: Reply with quote

remove the cover of the fluid reservoir .. whilst lookin at the fluid surface .. fully depress the back brake ... see if any back pressure ..
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Fizzer Thou
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PostPosted: 18:41 - 29 Jan 2023    Post subject: Reply with quote

Seeing as the MT10 has ABS I would suppose that any drag has caused the brake fluid to overheat and cause fade.Once cooled down and pressure has resumed,this is a typical example.

If the fluid has never been replaced it would be best to bleed the system through with fresh fluid from an unopened bottle.Bleed the front calipers as well.One 500ml bottle of DoT4 will be enough to do the job and can be bought from the likes of £5.
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dave001
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PostPosted: 20:25 - 29 Jan 2023    Post subject: Reply with quote

Fizzer Thou wrote:
Seeing as the MT10 has ABS I would suppose that any drag has caused the brake fluid to overheat and cause fade.Once cooled down and pressure has resumed,this is a typical example.

If the fluid has never been replaced it would be best to bleed the system through with fresh fluid from an unopened bottle.Bleed the front calipers as well.One 500ml bottle of DoT4 will be enough to do the job and can be bought from the likes of £5.



thanks

that makes sence that could well be the answer no fluid had never been replaced never have pads need to be as its a 2019 bike and only had less than two thousand miles on when i got and had just had its first service

its due its secon service but id been putting off a bit as iv had a kneeinjury and want in much of a fit state to do i want able to ride to the end of the summer

i aint been useing it over the worst of winter and only been out twice on it since snow

and was plaining servicing it say when it warms up in march /april

and the pads were still ok till then and i was going to chuck in a full set of ebc or better

the pad retaing pin is a bit crudded up when i looked so i recon rear need a strip and clean

if not had a bike with ABS before and dint think of that

not having much luck justwith abs lol spent 2 hours under the audi drilling out one of the wheel sensors last week in frezzing cold

i had not looked up what fluid is in em iv proberly got a couple of bottles of dot4 i got a vacume bleed if can find


ill just do the service now and have the caliper right off and have a look at seals and pistion
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mtriderrob
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PostPosted: 21:09 - 30 Jan 2023    Post subject: Rear brakes Reply with quote

If you do change the brake fluid by bleeding it through, you will probably need to activate your ABS once done and then bleed again otherwise you will still have old fluid in the ABS pump which will just contaminate your new fluid again.
There are 2 ways of activating the ABS on the super ten, one method is to use a jumper wire across a couple of terminals on a plug under the seat followed by operating first the front brake and then the rear with the ignition turned on.That’s the recommended Yamaha procedure for my 1200 Super Teneré so I wouldn’t have thought the MT10 would be much different.
The 2nd more fun way to do it is by riding on a loose/slippery surface and trying to lock the wheels, please only use this method if your riding skills allow you to do so, easy to do on a Super Ten, probably less so on an MT10!
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dave001
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PostPosted: 00:28 - 31 Jan 2023    Post subject: Re: Rear brakes Reply with quote

mtriderrob wrote:
If you do change the brake fluid by bleeding it through, you will probably need to activate your ABS once done and then bleed again otherwise you will still have old fluid in the ABS pump which will just contaminate your new fluid again.
There are 2 ways of activating the ABS on the super ten, one method is to use a jumper wire across a couple of terminals on a plug under the seat followed by operating first the front brake and then the rear with the ignition turned on.That’s the recommended Yamaha procedure for my 1200 Super Teneré so I wouldn’t have thought the MT10 would be much different.
The 2nd more fun way to do it is by riding on a loose/slippery surface and trying to lock the wheels, please only use this method if your riding skills allow you to do so, easy to do on a Super Ten, probably less so on an MT10!


thanks good point i dint think of that its simple enoutgh to lock the rear brake if do it deliberatly you can do it on the dry if step on it hard enoutgh

I will have a look in the workshop manule re ABS on it Iv not had to mess around much with as its only just due its second service

if just orded a full set of pads as i may as well clean em all and and chuck in better pads as there all getting lowish and do a oil change
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AlanSmith7
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PostPosted: 14:17 - 01 Feb 2023    Post subject: Reply with quote

I also face this situation and this one is pathetic. I can’t figure it out how I can resolve this issue but sure when I read all your comments now I know what to do with mine. Thank you so much for helping me also.
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Nobby the Bastard
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PostPosted: 15:45 - 01 Feb 2023    Post subject: Reply with quote

Any chance you two can find a language you both understand rather than the pair of you struggling with English when it's clearly not your first language?
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dave001
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PostPosted: 17:25 - 01 Feb 2023    Post subject: Reply with quote

AlanSmith7 wrote:
I also face this situation and this one is pathetic. I can’t figure it out how I can resolve this issue but sure when I read all your comments now I know what to do with mine. Thank you so much for helping me also.



if you have a mt10 or a bike with abs dont rotate the wheel with it off the ground and the ignition on unless you have a diagnostic tool to clear fault code
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