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Dirt Bike Discussions By Brand
Kawasaki MX & Off-Road Dirt Bikes
KX 125 Woodruff Key
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[QUOTE="RM_guy, post: 1417789, member: 20652"] Guys, I hate to break it to you but the key is NOT there to prevent rotation. It is only there to insure proper alignment. The taper in the shaft along with the proper torque is what keeps the flywheel from spinning. It is very important that the taper (on both the flywheel and the shaft) is perfectly clean before assembly. Any oil or contamination will mess up the joint. You shouldn’t even touch it after it’s been cleaned. Then the nut has to be torqued to the correct spec. If the key does shear and the flywheel has been spinning for very long it can damage the tapers and you may need to replace both the flywheel and the crankshaft. They can be repaired if it isn’t too bad but if not done properly it will just spin again. So, yes you can run it without the key but it has to be aligned properly and, more importantly, if it has already spun the tapers must be inspected to insure they are not damaged. [/QUOTE]
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Dirt Bike Discussions By Brand
Kawasaki MX & Off-Road Dirt Bikes
KX 125 Woodruff Key
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