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Offline Will Morgan

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Clutch M/cylinder leak
« on: May 12, 2019, 10:51:21 PM »
Has anyone had a leak from the top of their clutch master cylinder? After a 'spirited' ride mine started oozing today while parked on side stand.

How much does the fluid expand in use and/or with heat?  The leak stopped once the handlebars were straight & level & bike cooled down. Could it have expanded enough to force a leak?

I'm guessing (= hoping) that the dealer either over-filled it or didn't refit the gasket / lid correctly at the recent 30k mile service and the warm fluid expanded it enough to weep a little and that its not anything more serious.

Any hints, clues, suggestions etc welcome - I'll be phoning the dealer first thing in the morning!

Offline NiK

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Re: Clutch M/cylinder leak
« Reply #1 on: May 13, 2019, 11:51:04 AM »
Never heard about clutch fluid expanding to the point of bypassing the cover/gasket/banjo tightening.
I'd place my bet on bad a gasket (probably caused by the dealer).

Beware though that the fluid is extremely corrosive to almost any kind of paint!

Offline ijinak

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Re: Clutch M/cylinder leak
« Reply #2 on: May 13, 2019, 05:50:07 PM »
Ah, it's been to a dealer. I think I see your problem.......

Offline NiK

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Re: Clutch M/cylinder leak
« Reply #3 on: May 14, 2019, 10:17:16 AM »
Can't help remembering the good old days when my mech was in charge of servicing my bikes!
He was a mech. A true one. Never missing anything.
But that was before the 21st century unfolded its global all-business approach...

Offline avfan

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Re: Clutch M/cylinder leak
« Reply #4 on: May 15, 2019, 03:37:19 PM »
Risking a possible silly question, prior to the ride was the level visible in the sight glass with the bike on the center stand?

 


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