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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Swing Arm Bearings?
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[QUOTE="jmics19067, post: 321642, member: 27963"] If you have access to a oxy/acet. torch this is what I do to replace the bearings. Put your new bearings in the freezer. Swingarm off and everything cleaned well. Measure where the bearings sit, ie. are they one one side ,in the middle , not quite in the middle etc . . Find yourself a bushing driver that fits your needs<socket if need be>. Fire up your torch as hot as it gets <itsa neat trick but it is trcky> if all the needles are out of the race quickly try and draw a line of extreme heat from one side of the bearing to the other. The object here is quick you want to try and heat and expand the race as quickly as possible so as it cools it will shrink and in the mean time the aluminum swingarm is absorbing the heat expanding. Most of the time they will tap right out with a light hammer . If not then turn off the oxygen and cover the area with soot, feed your oxygen to your torch until you get a soft flame and heat the swingarm. When the soot starts to burn off that is as hot as you would want to get the aluminum. If they don't tap out easy now my experience has been you are probably going to be heading to a press now. Clean up the with a rag and a scothbrite for the tuff crud ,be careful it will be hot shouldnt be hot enough to burn you bad per se but hot enough to make you jump. Cover the outside of your frozen bearings with antisieze and slide in might need a slight tap to your desired measurement. Wait till everything is cool to handle ,clean, grease and install [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Swing Arm Bearings?
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