A little knowledge...

[scoffey]

I'm postin' this here because I don't want to bore the general populace. It's a kindof idiot me/aircrash investigation sort of story.
Been bedding in a 2nd hand slipper on the Duke, and began to notice a bit of a slip pulling away. Also the action appeared to be working its way out the lever.
So I sez to meself, I know what I'll do, I'll stick a second plain plate on the inside of the clutch stack and pack it out a bit more. And it worked a treat, no more slip, weather fine the week, herself gets a few outings. Did notice the clutch reservoir was a bit low, and topped it up at work one day. Next morning, quarter mile down the road, clutch locks solid - air in the line, no question. But couldn't get a gear to engage. Pushy pushy homey homey.
Strip the clutch out and discover the extra plain plate I'd put in (from me old clutch) was thin enough to fall into the gap when the hub split, jamming the slipper action open! Hence no engage
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Basically the problem from the beginning was air in the clutch line and my 'fix' was bollocks
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[bsd]

how do you find the slipper clutch on your commute and around town?

[Gixxer]

Originally Posted by scoffey

Basically the problem from the beginning was air in the clutch line and my 'fix' was bollocks
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How would 'air in the clutch line' make the clutch slip?
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[scoffey]

Originally Posted by Gixxer

How would 'air in the clutch line' make the clutch slip?
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air in the slave would affect the action - I'm assuming an air cushion was delaying the re-engaging of the clutch
hi bsd, still got those trk fairings? Don't find the slipper a prob round town, but then, I don't do town so much

[n.mack]

I think there is a lot of hot air in your line story
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[bsd]

Originally Posted by scoffey

air in the slave would affect the action - I'm assuming an air cushion was delaying the re-engaging of the clutch
hi bsd, still got those trk fairings? Don't find the slipper a prob round town, but then, I don't do town so much

I still have them I think,will check and drop you a text. Have a slipper clutch arriving some time next week

[Gixxer]

Originally Posted by scoffey

air in the slave would affect the action - I'm assuming an air cushion was delaying the re-engaging of the clutch
hi bsd, still got those trk fairings? Don't find the slipper a prob round town, but then, I don't do town so much

No, that wouldn't cause the clutch to slip. The system would have to be pressurised for that to happen, and as soon as you let the clutch lever fully out, any pressure in the system is released back into the reservoir.

A little knowledge is a dangerous thing
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[scoffey]

Originally Posted by Gixxer

No, that wouldn't cause the clutch to slip. The system would have to be pressurised for that to happen, and as soon as you let the clutch lever fully out, any pressure in the system is released back into the reservoir.

A little knowledge is a dangerous thing
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Yeah but what about the relative compressibility of air versus hydraulic fluid - I'm not bein' smart, its just that the bite point was also changing as the system inducted air. No air in system now, clutch don't slip?

[Gixxer]

Originally Posted by scoffey

Yeah but what about the relative compressibility of air versus hydraulic fluid - I'm not bein' smart, its just that the bite point was also changing as the system inducted air. No air in system now, clutch don't slip?

How would the air become pressurised to the point that it would effectively activate the slave cylinder enough to hold the pressure of the clutch springs? It would have to be pumped up with an airline to do that.

[Gixxer]

It's possible that the piston in the master cylinder isn't returning all the way due to corrosion. That could cause the clutch to slip and letting pressure out of the system would cure it.

[scoffey]

Not a hyrdraulics engineer meself - I assumed that if you had a more 'plastic' element in a sealed line system it would somehow damp the piston action.
All I know is that once I bled the system the slipping problem went away, so you explain it
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[scoffey]

Originally Posted by Gixxer

It's possible that the piston in the master cylinder isn't returning all the way due to corrosion. That could cause the clutch to slip and letting pressure out of the system would cure it.

Brand new

[Gixxer]

Originally Posted by scoffey

Not a hyrdraulics engineer meself - I assumed that if you had a more 'plastic' element in a sealed line system it would somehow damp the piston action.
All I know is that once I bled the system the slipping problem went away, so you explain it
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Too much fluid in the reservoir?

I can only guess, but air in the system wouldn't cause it.
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[scoffey]

Thrashed it proper this morning and everything sweet as a nut. Whatever it was, it's gone away. Aircrash Investigation never ends with a duhh?
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