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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Can't remove magneto rotor
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[QUOTE="dirt bike dave, post: 1433884, member: 18302"] Man, that is a tough one. Basically the rotor has fused to the end of the crank over the decades. IMO, your best bet is the puller and tightening it a lot more than you should have to, and more than you think it can take. Hopefully it will pop off just before the puller's threads strip. When the metals meld like that, heat does not seem to do much, and you will have a difficult time getting any liquid wrench or any other substance in there to lubricate or break the bond. You can rewind the stator if it gets damaged, but you really don't want to damage the cases or crank. Not sure how hard it is to find a replacement flywheel/rotor for the KDX80. I'd sacrifice the flywheel before I risked the crank or cases. Maybe you can lock the crank via the primary drive on the right side down, then spin the flywheel with an oil filter wrench or something like that? You will have to shear the woodruff key that holds the rotor in line on crank, but it might be easier to rotate the flywheel on the crank to break the bond, rather than pull if straight off. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Can't remove magneto rotor
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