I go about an 1/8" beyond the end of the thread as an initial setting....It is often the case the setting will not be identical on each adjuster to achieve even lifting of the plates..Ian
I've improved things a bit but it's a bodge.
There's bad scarring on the contact area of the clutch basket where it contacts the fibre clutch plate. Probable corrosion in storage? I hadn't thought this would be an issue. But perhaps this is causing the drag? I've put 2 fibre plates in before the metal plate to hopefully reduce friction. I think this may have helped.
The basket from the old clutch is in reasonable condition & perhaps I'll try fitting this.
Bob did you try Ian's suggestion of leaving one steel and one fiber plate out of the stack?
I'm currently fitting a Bonny clutch to my special for no other real reason than it's "cush" hub. I've ran this bike for 6000 miles on a standard M20 single spring clutch with two plate removed..... It's far more powerful than an M20.
I also run my WM20 (600cc) with the two plates removed.
I can't really think how the friction plates can hang up? More likely the steels if they are worn or a poor fit?? Ron
Ron
Yes, I tried leaving out the two plates. It made no difference to the drag. I agree that it'd be hard for the plates to hang up but it was all I could think of. In fact I can see them moving when the handlebar lever's pulled in. I'll try the basket from the old clutch tomorrow & see what happens. Other than that I haven't a clue.
Incidentally, my pushrod was way too long to work with the 2 plates removed. Can you remember what length pushrod you use? Mine's about 12 13/16" though the bearing surface would be a bit less because of indentations at each end.
The standard length for a WDM20 clutch pushrod is 12.740"-12.750", so nominally 12 3/4".
On that basis Ron's 12 5/8" would be about right with two plates removed as the thickness of one fibre plate (.093") and one steel plate (.048") is .141" ..Ian
Well, I seem to've fixed things simply by fitting the spring from the old clutch. I know springs can be variable. I'd looked at the new spring & as accurately as I could measure it seemed true, not so it seems. But I find it hard to believe the new spring could be so bad as to cause that much drag. Repeating, I could pull the handlebar lever in & the clutch simply didn't work.
I've put all the plates in to fit the pushrod, I'll sort a shorter one & try taking out the 2 plates.