Brake line discoloration - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 8 (permalink) Old 06-22-2019, 12:58 PM Thread Starter
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Brake line discoloration

Just rebuilt the calipers and put new lines on the other week. Not used the bike yet since and noticed a discoloration in on if the hose covers, any guesses as to what it is, hoping not fluid as that would mean the new line is faulty, looks too dark for new fluid tho.
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post #2 of 8 (permalink) Old 06-22-2019, 03:09 PM
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Question a mystery indeed my dear Watson.........

I have no idea how, but could oil have gotten on there, is it dry?

One of the resident clever tech people here with a few clues will have a decent idea I'm sure.

Sure looks a bit odd.

Can I ask why you changed from the stock rubber coated braided lines though?

Whatever the case, good luck mate.
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post #3 of 8 (permalink) Old 06-22-2019, 03:14 PM Thread Starter
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It's inside the plastic coating so not able to tell if its dry or not, had braided lines on it when i got it but the ends where it joined the calipers were corroding so needed replacement.
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post #4 of 8 (permalink) Old 06-22-2019, 08:27 PM
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More out of curiosity; when you pump up the brake, does it hold?

OOh looke a custom signature !
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post #5 of 8 (permalink) Old 06-23-2019, 02:37 AM Thread Starter
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Yeah there seems to be full pressure in the system
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post #6 of 8 (permalink) Old 06-26-2019, 02:21 AM Thread Starter
Supersport 400
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Emailed the manufacturer, this was the reply,

Apologies for the discolouration of your brake line.

When the hose is made it is pressure tested using water. It appears in these unusual cases the water has got trapped between the braid and PVC cover.

The braid is stainless steel, but there are many different grades of stainless. Most grades of stainless contain small amounts of Iron and Nickel. The small amount of Iron content can cause your line to discolour, essentially it’s rust that could be wiped off if you were to remove the outer coating. Although, this might be unsightly, it’s perfectly safe.

We will cover this defect with your warranty*and send you a replacement.

24 hours later a replacement arrived, no mention of wanting the old one back.
Now to fit it.
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post #7 of 8 (permalink) Old 06-26-2019, 04:58 AM
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Thumbs up Nice one

Well Watson that was...... well elementry my dear chap!



Great result mate, that's what I call customer service and smart business behaviour.
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post #8 of 8 (permalink) Old 06-26-2019, 03:31 PM
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Acceptable explanation, poor quality control.

Masquerading every day as a normal person is exhausting.
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