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Author Topic: 690 Front Brake Troubles  (Read 165 times)

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Offline aka.Goliath

690 Front Brake Troubles
« on: November 20, 2018, 05:31:51 pm »
I really hope someone can help me with this one.

At the start of a ride or when cooled my front brake lever feels good with some leverage before it kicks in however when I start using the front brake it starts firming up to almost no movement before it kicks in. I'm worried it will keep going till and can't unlock the brake.

I once had an issue with the brakes before. It appeared the master cylinder was over filled by the dealer on a service. It would keep fading until I had no brakes, so I kept on adjusting it to gain back some brakes. Long story short. I had a look at it when home after the long trip and in the process removed some fluid and it was just fine after that and needed to be adjusted back to where it originally was.

Now I have much the opposite. I've tried adjusting the lever, filling with new fluid, flushed the system with new fluid, filled it up, removed fluid. Nothing has made a difference, it keeps on doing the same thing.

Any advise would be appreciated!
BMW 1150 GSA - 2004
KTM 690R - 2014
KTM 300 X-CW - 2012
KTM 530 EXC Rally - 2011 SOLD, KTM 690R - 2009 SOLD, BMW 1200GS 2009 SOLD
 

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Re: 690 Front Brake Troubles
« Reply #1 on: November 20, 2018, 05:45:09 pm »
I would order a service kit and replace the seals etc. in the master.
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Offline aka.Goliath

Re: 690 Front Brake Troubles
« Reply #2 on: November 20, 2018, 11:04:29 pm »
I have now looked everywhere and just cannot find a rebuild kit or anything really besides paying over R3000 for a whole new assembly. There has to be an easier way. It's a 2014 model, I can only find up to 2013.
BMW 1150 GSA - 2004
KTM 690R - 2014
KTM 300 X-CW - 2012
KTM 530 EXC Rally - 2011 SOLD, KTM 690R - 2009 SOLD, BMW 1200GS 2009 SOLD
 

Offline aka.Goliath

Re: 690 Front Brake Troubles
« Reply #3 on: November 20, 2018, 11:08:25 pm »
The question is there a good reason why I can't just use the assembly (the whole master cylinder and lever) from a 2013 model on my 2014.  Beside the 2014 having ABS what difference could it make.
BMW 1150 GSA - 2004
KTM 690R - 2014
KTM 300 X-CW - 2012
KTM 530 EXC Rally - 2011 SOLD, KTM 690R - 2009 SOLD, BMW 1200GS 2009 SOLD
 

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Re: 690 Front Brake Troubles
« Reply #4 on: November 21, 2018, 08:25:02 am »
KTM must have a kit?
"Love is the feeling you get when you like something as much as your motorcycle" - Hunter S. Thompson

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Offline aka.Goliath

Re: 690 Front Brake Troubles
« Reply #5 on: November 21, 2018, 08:35:22 am »
No nothing. Phoned around and there's nothing! Which is quite ridiculous, it's R3500 for a new master cylinder.
BMW 1150 GSA - 2004
KTM 690R - 2014
KTM 300 X-CW - 2012
KTM 530 EXC Rally - 2011 SOLD, KTM 690R - 2009 SOLD, BMW 1200GS 2009 SOLD
 

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Re: 690 Front Brake Troubles
« Reply #6 on: November 21, 2018, 09:05:18 am »
Is it Brembo or Magura. Kits must be available.
"Love is the feeling you get when you like something as much as your motorcycle" - Hunter S. Thompson

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Offline aka.Goliath

Re: 690 Front Brake Troubles
« Reply #7 on: November 21, 2018, 09:07:54 am »
Magura. If someone knows of a kit please let me know. I can't find anything online.
BMW 1150 GSA - 2004
KTM 690R - 2014
KTM 300 X-CW - 2012
KTM 530 EXC Rally - 2011 SOLD, KTM 690R - 2009 SOLD, BMW 1200GS 2009 SOLD
 

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Re: 690 Front Brake Troubles
« Reply #8 on: November 21, 2018, 01:29:17 pm »
Magura. If someone knows of a kit please let me know. I can't find anything online. Not sure what the piston diameter is but cannot be too difficult to ascertain. Generally the smaller enduro bikes use the 9.5mm

I still claim KTM must supply the Magura piston kit for the 690. Not sure what the piston diameter is but cannot be too difficult to ascertain. Generally the smaller enduro bikes use the 9.5mm  and think the 690 is a 10.5.


https://www.ebay.com/itm/Genuine-KTM-Rr-Brake-Master-Cylinder-Repair-Rebuild-Kit-Magura-13mm-83013061000/162553403265?epid=5003182178&hash=item25d8f01781:g:ijYAAOSwCkZZQT1W:rk:5:pf:0&vxp=mtr

https://www.ebay.com/itm/Magura-Hydraulic-Clutch-Master-Cylinder-Piston-Rebuild-10-5mm-10-5-KTM-0720499/192129901384?epid=171158095&hash=item2cbbd5a348:g:oEEAAOSwEeFVMPjf:rk:34:pf:0&vxp=mtr

"Love is the feeling you get when you like something as much as your motorcycle" - Hunter S. Thompson

Scoots: BMW HP2  Husky 701 Husky  TE610E  BMW G450X  KTM 250XCW  BMW R100S YAMAHA BWS 

 :ricky:
 

Offline BuRP

Re: 690 Front Brake Troubles
« Reply #9 on: November 21, 2018, 01:55:32 pm »
At the start of a ride or when cooled my front brake lever feels good with some leverage before it kicks in however when I start using the front brake it starts firming up to almost no movement before it kicks in

Lol, that's a stupidly simple fix: adjust the lever so that the piston clears the compensation hole again.
(The compensation hole is the tiny hole in any master cylinder which 'compensates' an excess of fluid which has expanded in volume due to heating up of the brake fluid. Easily recognised, it squirts a little when you pull the brake - that is if it's open/unblocked, in your case it does zilch)
If it's not the lever adjustment then open up this little hole from the top, remove the cover of the reservoir.
Mind, if it's blocked (which I doubt...) then better bleed the whole system and put fresh new clean fluid in - as this hole may not block, however it may if there's rubbish in the fluid.
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