Strange clutch slippage problem

[Borderer]

This is a wierd one!
BSA Super rocket with Triumph 4 spring clutch not a new installation
New plates, friction and metal, new springs, pushrods straight and cut with ball bearing in middle, basket and center deburred. Everything working as it should BUT
The clutch slips quite badly for first 10 miles or thereabouts, after that it is perfect!!
I fitted a new cable, there is free play at the gearbox adjuster when cold. I did the ball bearing mod on the advice of an old classic trials rider, as it allows the rod to centralize and not catch on the tube.
All I can think of is once a certain temperature is reached something is freed off but what?
It's livable with but a bit annoying, I suppose it stops over revving a cold engine though!

[bsa-bill]

New plates with nice sharp tangs on them, could they be snagging in the clutch drum slots when cold and then fine once it warms up a bit - a random thought

[morris]

How have you filled the basket up?
Started with a plain plate and ended with the same or did you put in a friction first?

[Borderer]

Plates plain to plain drum slots smooth as a politicians excuse,

[chaterlea25]

Hi Borderer
What lube do you have in the primary??
A lot of oils make the clutch slip  (car ones)
Which springs did you fit?? I can recommend the Triumph type supplied by SRM
A lot of springs out there are to heavy and too short 

HTH
John

[RichardL]

I know that my clutch slips a little more when cold by the way I can shift into first clunk-free when cold at a stop, but with a bit of clunk when hot. This said, I don't have to go 10 miles with slippage. I'm thinking that cold ATF (in my case) is more slippery than hot ATF, or, that hot plates and friction material have expanded, or a bit of both. How about just giving the nuts another turn, or so, to just barely disengage when cold? I'm just guessin' so feel free to wait for some better answer if you don't like this one.

Richard L.

[anjimehra]

Try transmission oil in the primary casing
Anji

[Topdad]

Metal plate slightly warped ,when cold more resistant as it warms more malleable and flattens or the oil, mine slips slightly until warm but just have a careful wrist until its happy ie when its warm, cheers Bob.