I haven`t had mine off, but I`ll tell you what I can.
First thing is check the clutch release lever on the engine. Push the lever in the normal direction of travel until you feel resistance when the clutch just begins to release. The gap in the lever should line up with the rib in the boss on the bevel gearcase. Remember this for when you are adjusting the cable on the new handlever.
There are two cable slack adjusters.
One is about halfway along the cable between the hand lever and the release lever on the transmission case.
It should be clipped to the left front down tube on the frame in plain sight.
The second is at the front of the clutch hand lever pivot.
Loosen the locknuts, then turn the adjusters in on both to get maximum slack in the cable.
Align the slots in the adjuster and locknut at the hand lever to remove the cable from the lever.
(Be careful of the little switch and button that extends and is exposed below gap when the lever is pulled back.
I recall someone saying it is easy to break, but not sure exactly what to watch for.)
Then remove the pivot bolt.
Install in reverse order.
Check that the clutch release lever gap lines up with rib on bevel gearcase as described above.
Set upper adjustment to 5-6 mm freeplay.
Then set middle adjuster just snug. Tighten locknut.
Go back to top adjuster and set final freeplay at 2-3 mm freeplay. Tighten locknut.
Should be good to go!
If I have missed anything, someone will correct me.