The Moss box clutch operating mechanism is an awful piece of engineering but does seem to work!

At least 8 pivot (wear) points in the linkage multiply wear until the pedal travels a long distance and that's before the motion finds its way to the clutch operating sleeve and carbon release bearing.

The whole pedal assembly pivots in two alloy blocks which wear oval. The pedal assembly is based on a piece of 1' diameter CDS tubing and the really bad ones I have seen have the ends worn down to paper thickness.

Retubing them is a right pain in the arse though I did build a fixture to hold the pedals onto the tube before pinning and brazing.

Two strips of 4" long 1/2" x 1/8" steel strip transmit motion to another bit of 1/2" x 1/4" steel strip then onto a clevis then onto another clevis which is attached to the bottom of an alloy clutch operating sleeve through which a short propshaft runs. Unfortunately the steel peg runs in a slot machines in a soft magnesium alloy known as Elektron as result the slots tends wear! Curing it is a machine shop job and usually involves boring out the slot to take a 01/2" i.d. needle roller bearing which is slipped over the operating peg.

Incidentally, there should a stop on the pedal bar which stops the pedal travelling to far forward. Is a piece of 1 1/4" steel round with a small steel tab welded to it - the end of the tab bears against the toeboard/front crossmember which limits the pedal movement.

Hope this helps

Arwyn