Why is leaked clutch fluid black?

General Bike chat
Post Reply
User avatar
Image
Posts: 703
Joined: Tue Sep 20, 2011 2:27 pm
Location: Hyde, Cheshire (near Glossop)
Contact:

Why is leaked clutch fluid black?

Post by Image »

Got a small leak from my clutch reservoir which I'll rectify soon but why is the leaking fluid black?
User avatar
Wicky
Posts: 7895
Joined: Sat Feb 11, 2006 2:43 pm
Location: Colchester Essex
Contact:

Re: Why is leaked clutch fluid black?

Post by Wicky »

It turns black as it's been exposed to air, moisture and heat, in other words hydraulic fluid needs urgent changing. And best do brake fluid at same time.
It may be that your whole purpose in life is simply to serve as a warning to others.

ImageVTR Firestorm and other bikes t-shirts
User avatar
VTRDark
Posts: 20010
Joined: Sun Mar 18, 2012 9:24 pm

Re: Why is leaked clutch fluid black?

Post by VTRDark »

It probably wont help your clutch slip either. Best to do a fluid change and bleed it all off. :thumbup:

(:-})
==============================Enter the Darkside
User avatar
Miff_UK
Posts: 17
Joined: Mon Jun 04, 2012 10:02 pm
Location: Malton, UK

Re: Why is leaked clutch fluid black?

Post by Miff_UK »

It turns black due to the small amounts of rubber from the clutch slave cylinder seals.

Mine's the same on my Mille.

Don't know why this does not affect the brake side. Try new seals / master cylinder repair kit if it bothers you or just change the fluid more regularly.
User avatar
Image
Posts: 703
Joined: Tue Sep 20, 2011 2:27 pm
Location: Hyde, Cheshire (near Glossop)
Contact:

Re: Why is leaked clutch fluid black?

Post by Image »

Doing regular top ups at the moment but it needs a seal kit as soon as I have the time and money.
Post Reply