To replace the clutch discs in your clutch pack, first disconnect the battery and drain the oil from the primary case. Remove the primary case. Take the circlip in the middle of the clutch assembly out and remove the clutch adjuster plate. Then loosen and remove the bolts that hold the clutch together. Loosen them all and take them out evenly loosening each bolt one or two turns at a time so as not to warp the clutch spring. Once you get this off, you can remove the spring and the clutch plates. As you take the individual parts out, notice the sequence that they are installed in the clutch basket. When you replace the parts you wish to replace, make sure you get everything back in the proper order. Put a little Loctite 242 med. blue on each of the bolts that hold the spring plate on. Replace the clutch adjuster plate and circlip. Replace the primary cover and fill with oil up to the bottom edge of the outer clutch basket with the bike standing straight up. Do not overfill or your clutch will drag. Adjust the clutch according to the manual.
To adjust the clutch, find the clutch cable adjuster in the middle of the clutch cable. Slide the protective boot up or down and loosen the lock nut. Turn the adjuster barrel inwards to get as much slack as you can get.
Remove the derby if you don't have it off. Loosen the lock nut on the adjuster screw in the middle of the clutch assembly. Back the center screw up until it's completely free and then turn it back in until you feel a resistance. DO NOT FORCE THE SCREW. It will break the inner clutch hub if you force it. If necessary, perform this several times to get the "feel" of what you're doing. Once you feel the resistance, stop, then back off 1/2 turn. Tighten the lock nut down.
Then go back to the cable adjuster and turn the adjuster barrel out until you've got about an 1/8 freeplay in the cable. Squeeze the clutch a few times and recheck the freeplay. Tighten the lock nut and replace the rubber boot.
Good Luck
Steve
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