Slipping clutch

DogT said:

It's all about stack height and pressure on the plates.

Excuse me, I'm repeating myself.

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When I hear about folks having a hard pull to operate clutch my first thought is that over time the fiber faces of the clutch plates have worn down enough to make the clutch stack height too short.
The adding of an additional plate restores the stack height to the optimum.
However making the stack higher reduces the torque capacity of the clutch and too much height causes slip.
I have a two finger pull after adding an Old Britts plate. They will send a set of several thicknesses and after you get the clutch you want you send the ones you don't use back.

I tried the OB plates and it made my clutch slip. I couldn't find a pack height that worked. Sent them all back. Funny thing is I'm still on my original postage stamp fiber plates, but only 14K miles so far and the stack height is still in spec. Actually you can get a thin Barnett plain plate for a few bucks to try to reduce the pull and if it doesn't work/ie. it slips, nothing much lost.

I've had people tell me my clutch is stiff, but I don't think so. It's not like pulling on feathers, but when the pressure plate goes over, it's not hard to hold at all. The bike does take off like a rocket however, because it's a Norton.

Dave
69S