Decided to put a kit in my mate's Clubby clutch slave cylinder to go with his `new' motor.
Took it apart, gave it a quick hone and then found the new 7/8" seal in the kit wouldn't fit.
?????
Somebody has sleeved it with S/S. Would be nice if they'd bored the casting out bigger first, then bored the sleeve to 7/8" and used stock seals and piston!
Now I need to go find a 13/16" cup seal instead.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Working over x-mas? I am staying away from the shed today. Its 39 degrees outside.

Mine is undersized ..to allow for the other non standard bits. A smaller bore gives a bigger throw.

At the time it was made I was told that older Toranas used the same (or at least similar but with reduced bore) cylinder.

Cheers, Ian

That may be what it's off, as the piston, & seal spreader are `undersized' too.
I'm sure it'll work fine, once I get a 13/16" cup seal [on Tuesday?] here's hoping B&R Brakes are open this week..

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Would the sleeve take a careful 1/16 removal?

_________________
"Show me the Mini!"

Good luck setting it up to run true first. And the piston it has won't fit If I bore it out.
Nah I'll just get a 13/16" cup.
It's only running a stock Cooper S blue dot diaphragm. Motor is a `short stroke 1108' (68mm bore, 998 crank)

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Good luck setting it up to run true first...hardly a challenge for an old Eveleigh boy

And the piston it has won't fit If I bore it out...get another

Nah I'll just get a 13/16" cup....sounds like a plan

It's only running a stock Cooper S blue dot diaphragm...only

Motor is a `short stroke 1108' (68mm bore, 998 crank)...nice

_________________
"Show me the Mini!"

Just buy a new slave cyl, there cheap!!

But they're not original!

Sorry, I'm not a pureist lofnl

And the cheap ones are all missing an essential part (seal spreader).
All fixed, I put a new 13/16" cup seal in it.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

You mean, a backup ring?

Seal spreader, it keeps the seal in contact with the bore.
Without it, they suck air once the seal starts to wear.
Can't buy them as a spare part now but DrMini has made a few up from HDPE.
Spring sits inside it. Originals had 3 holes but it's easier to space 4 on my mill.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

This can make you one.

This can make you one.[/quote]
Possibly not....