Oberon Clutch slave leaking

[Mr Gazza]

I use an Oberon. Funnily enough I was studying pictures of the slaves only yesterday with a view to converting one for another project.

I noticed what they describe as "anti-rotation" grooves in the engine side of the unit.
There's no way that these grooves will stop rotation in our Monsters, with a standard pushrod.
But if the pushrod had a small pin through at 90deg, that engaged in the grooves then it would work.
I changed my thrust bearing as I worried that the pushrod was spinning the slave piston every time it touched it, thus chewing out the seals prematurely, but the pushrod was still just as tight a fit in the bearing as before.
This relies on there being more resistance in the pushrod's tube, than in the bearing, to prevent, or reduce rotation.

Thinking of trying a pin.. (Could be tricky?)

[Mr Gazza]

Like so...

[Luddite]

Originally Posted by Mr Gazza

I noticed what they describe as "anti-rotation" grooves in the engine side of the unit.
There's no way that these grooves will stop rotation in our Monsters, with a standard pushrod.
But if the pushrod had a small pin through at 90deg, that engaged in the grooves then it would work.

I think the design changed with the introduction of the 696. I remember because the DP slave from my S2R wouldn't fit on the 1100 Evo.

On the exploded view, the pin (18) mentioned by Mr Gazza engages with the anti-rotation insert (22).



As there wasn't a Ducati Performance cylinder available initially, I fitted an Oberon six years ago and have had no problems with it.