I'm looking at getting a kit installed to make the clutch lever a bit lighter to use. The arthritis is catching up in the left hand.  I've seen two options, one out of the HD catalogue and an aftermarket unit.  Both involve changing the lever the cable fits into at the gearbox end.   Has anybody fitted one to an earlier twin cam and do they make any difference.   Any advice is welcome....beagle

Yes they do work. Ever tried a late model clutch ? part # 36808-05 about $35 US with discount.
a quick read here : www.americanrider.com/output.cfm

Even a chick can fit one: bikerchickbook.com/bikerchickmag/techtips.html

Probably only good for a stock motor.

I bought one off E Bay, had it installed when i did my cams...Brilliant, makes a huge difference.

There is also one that fits under your hand clutch lever, kind of a spring wound booster. Only takes a couple of minutes to fit and works great. I fitted one to my '01 roadking. I'll see if I can find it in a catalogue if you can't find it.