To replace the starter drive clutch on your 1985 model Big Twin, first disconnect the battery. Drain the primary and remove the primary cover. Remove the starter drive shaft that has the clutch on it. Clamp the drive shaft in a vise equipped with soft jaws and remove the nut from the end of the shaft. The nut is the round piece on the end that has two flats for a wrench to fit. It has LEFT HANDED THREADS. Remove the starter drive and replace it with a new unit. Replace the nut using Loctite 271 red and put the starter drive shaft back in. Make sure you purchase a good starter drive clutch. Avoid the Chinese units as they don't hold up very well. If you need a diagram, go to this site. http://www.bikebandit.com/1985-harley-davidson-fxst/o/m1502#sch209973
Good Luck
steve
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