Brake Fluid Discolouring

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Pikey
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Brake Fluid Discolouring

Postby Pikey » Mon Mar 31, 2014 2:07 am

Hey guys, not sure if this is the norm with KTM's or the fluid they use, however mine is starting to discolour quite badly

The clutch fluid has not suffered as badly however both front and rear brakes are not good, can only assume it has something to do with the heat generated by the brakes....

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ebags
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Re: Brake Fluid Discolouring

Postby ebags » Mon Mar 31, 2014 3:21 am

More likely UV damage. Doubt you're getting heat up in the resi!

I've pissed off the coolant. It looked like a lime cordial would when you squeeze the last few drops out of the bottle in a desperate attempt to make one more glass. :lol: If the fluid is the same quality better get rid of it. Can't put a price on good brakes.

I thought I was imagining things as I've noticed similar but not as bad with only 1500km. Better go investigate closely.
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bic_bicknell
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Re: Brake Fluid Discolouring

Postby bic_bicknell » Mon Mar 31, 2014 8:41 am

Not sure about the 1290 but if it is the same as the 990s then remember that the clutch hydraulics require mineral oil, not conventional brake/clutch fluid which would rot the seals. Check your manual.
Past: Honda CB125J, Honda TL125, 1963 Triumph Tiger 90, Yamaha RD250, Kawasaki KH250, Kawasaki 400 S3, Kawasaki KH400, Kawasaki Z400J, Suzuki GS750, Suzuki GS1000, Ducati SS900 Superlight, KTM LC4 Supermoto, Honda VFR 800i, KTM Superduke '07.

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scamb66
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Re: Brake Fluid Discolouring

Postby scamb66 » Mon Mar 31, 2014 5:06 pm

bic_bicknell wrote:Not sure about the 1290 but if it is the same as the 990s then remember that the clutch hydraulics require mineral oil, not conventional brake/clutch fluid which would rot the seals. Check your manual.

Yep the same Magura blood, which will go black over time.
Couldnt imagine that they are uning anything else in the brakes besides Motorex (DOT 5.1?).
If it UV related maybe get a pair of socks for the resi or maybe its reacting with the orange bling?
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http://www.amazon.com/Black-Brake-Clutch-Reservoir-SuperDuke/dp/B004JV49F8
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Re: Brake Fluid Discolouring

Postby coyo » Mon Mar 31, 2014 7:04 pm

I've been looking for a set I like. Thanks for the link; ordered!

scamb66 wrote:
bic_bicknell wrote:Not sure about the 1290 but if it is the same as the 990s then remember that the clutch hydraulics require mineral oil, not conventional brake/clutch fluid which would rot the seals. Check your manual.

Yep the same Magura blood, which will go black over time.
Couldnt imagine that they are uning anything else in the brakes besides Motorex (DOT 5.1?).
If it UV related maybe get a pair of socks for the resi or maybe its reacting with the orange bling?
$20 Amazon

Image

http://www.amazon.com/Black-Brake-Clutch-Reservoir-SuperDuke/dp/B004JV49F8

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bic_bicknell
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Re: Brake Fluid Discolouring

Postby bic_bicknell » Mon Mar 31, 2014 7:47 pm

I get my Magura blood from cycle shops as they use it on hydraulic mountain bike brakes. It's easier to get hold of there rather than motorbike shops.

Also, my brake fluid discolours quite quickly I find. Klinky, every time he sees my bike says, "fooking change your brake fluid mate!" and I think - I did it only a few months ago!
Past: Honda CB125J, Honda TL125, 1963 Triumph Tiger 90, Yamaha RD250, Kawasaki KH250, Kawasaki 400 S3, Kawasaki KH400, Kawasaki Z400J, Suzuki GS750, Suzuki GS1000, Ducati SS900 Superlight, KTM LC4 Supermoto, Honda VFR 800i, KTM Superduke '07.

MaximusVR46
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Re: Brake Fluid Discolouring

Postby MaximusVR46 » Tue Apr 01, 2014 9:49 am

Manual says DOT 4 or DOT 5.1 not DOT 5.

I would rather use Motul RBF 600 or Castrol (both dot4)

If Motorex DOT 5.1 is in now would it have to be completely flushed to use DOT 4?
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Re: Brake Fluid Discolouring

Postby Bob » Wed Apr 02, 2014 5:43 am

MaximusVR46 wrote:Manual says DOT 4 or DOT 5.1 not DOT 5.

I would rather use Motul RBF 600 or Castrol (both dot4)

If Motorex DOT 5.1 is in now would it have to be completely flushed to use DOT 4?


I believe DOT 5 is silicon based. That's the one one which cannot be mixed.
Best I reckon to stay with DOT 5.1. Highest temp capability. Cast roll SRF is the elixir of brake life :). Bit pricey though.

SD05
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Re: Brake Fluid Discolouring

Postby SD05 » Wed Apr 02, 2014 3:42 pm

Can’t tell, is the brake fluid kind of blackish? If it is, I would consider contamination from the seals, a few purges should sort. Same problem with my wife’s Ducati.

UV, nah.

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ebags
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Re: Brake Fluid Discolouring

Postby ebags » Tue May 13, 2014 10:30 am

Pissed my fluid off a while back for Motul RBF600 which finnily enough is the same colour the factory fluid had become lol but at least its ment to be that colour. Wanted Castrol SRF but meh... Motul will do for now got better things to spend the money on like rims!
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sexparty
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Re: Brake Fluid Discolouring

Postby sexparty » Tue May 13, 2014 11:16 am

scamb66 wrote:
bic_bicknell wrote:Not sure about the 1290 but if it is the same as the 990s then remember that the clutch hydraulics require mineral oil, not conventional brake/clutch fluid which would rot the seals. Check your manual.

Yep the same Magura blood, which will go black over time.
Couldnt imagine that they are uning anything else in the brakes besides Motorex (DOT 5.1?).
If it UV related maybe get a pair of socks for the resi or maybe its reacting with the orange bling?
$20 Amazon

Image

http://www.amazon.com/Black-Brake-Clutch-Reservoir-SuperDuke/dp/B004JV49F8


Same ones I got.


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