Hiya!

I've had a small, but irritating issue with my clutch lately, at first I thought it was just air, and that it needed bleeding (becam a bit finicky after the tranny rebuild).

It decides to grip lower than usual, and slip (it's a 4-puck ceramic, and those doesn't slip at all ), and then it's back to normal again.

Almost as if the slave cylinder is leaking?

I'm not entirely sure on how this thing should work (hence this question) - but the small slave cylinder down on the box can be pushed in by just pushing lightly on the fork? The fluid seems to go back to the master cylinder container when I do this.

I don't think there's an issue with the actual clutch as it's working perfectly between these weird little moments.

Thanks!

/J

 

Forgot to add that I bled it last night, didn't help.



/j

 

Hi Jerry

If it only does it after using high revs, I suspect its an imbalance somewhere. May be the clutch, may be the flywheel.

If it is out of balance the vibration could partially evacuate the slave cylinder so you need more pedal travel before you get to the bite point.

 

Hiya Pete!

No, it happens intermittently in any circumstance really.
Going to have a look at the slave and master cylinder today.

/J

 

Hi Jerry

Check the release arm return spring above the gearbox, if it is weak or missing the release arm cam displace some fluid from the slave cylinder back to the master cylinder, especially as you accelerate hard. When you go for the pedal again the bite point has moved due to the free movement prior pressure building in the system.

Andy

 

Interesting, as I noticed the spring looked a wee bit slack last night...hum...this only happens when moving from a standstill however. It does judder quite badly due to it being a ceramic 4-puck thing...could that cause the fork to push the slave cylinder slightly?

Grasping at straws - I know.

Cheers lads!

/J