1) replace both the friction plate and it's mating piece with new parts, to ensure flat mating surfaces.
2) remove the transmission from the bike.
3) assembled, the assembly is under pressure from the spring. You need to remove 3 of the 6 fasteners holding the clutch together - every-other one.
Then you put in your "clutch removing tools", which consist of a 3 long bolts (50mm or 2 inch) with matching nuts, in the same pitch & diameter as the ones you removed. The nuts are placed further up the "collar" of the long bolts and will be used to release the spring pressure gradually.
4) tighten the nuts down on the clutch.
5) remove the remaining 3 fasteners with the nuts on the long bolts tight against the clutch.
6) back off the nuts in a circular fashion slowly releasing the spring pressure.
7) lay the clutch spring on a flat surface, and measure the height of the little fingers in the center.
My Haynes manual does not give a overall height, it just says "With the spring laid dished side down, the difference should not exceed 0.3 mm (.012 inches). With the spring the other way up, the max. difference in height of the rim should be 0.8 mm (.031 inches)."
All I can say is if you think you feel any clutch slippage, of if you have near 100,000 miles on the bike, replace the spring. I know I will when my time comes, and I only have 85,000 miles.
reassemble in reverse. Be sure to thoroughly clean and inspect the input shaft to the transmission, and lube with a moly-based grease, such as
Honda Moly 60.
Do not put lube on the matching splines of the clutch plate.
Put a dab on the tip of the push rod where it contacts the clutch plate.
9) check for oil leaks while you are in there. If you find engine oil, it could be coming from the rear main seal or the oil pump cover o-ring. You need to remove the flywheel to access these, and before you take that off, you need to block the crank so it cannot move forward and cause big problems.
The input shaft of the transmission also has a seal. If the leaking oil has a distinct smell to it, that is probably where the leak is.
Get one each of the Haynes manual and the Clymer manual. They have good pictures, but be aware that not only do they get some specs wrong from time to time, and also they are mostly about the bigger bikes. Check your library if you are in a big city.
