You will need to change the entire ignition system flywheel, stator plate, cdi unit, and maybe coil. Your bike has two pick up coils located on the stator plate leaving no room for a lighting coil to be mounted, the 90 or newer stator plate has one coil mounted on the stator plate leaving room for a lighting coil to be mounted. Unsure if the newer system will fit your bike, I have a 90 model ignition system for my bike that bolts right up.