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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
CR125 rear wheel bearing
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[QUOTE="Ol'89r, post: 1235923, member: 17212"] ALWAYS heat your hubs when removing or replacing a bearing. The bearings are an interference fit. That means the bearing boss in the hub is smaller in diameter than the outside diameter of the bearing. When you heat the hub, it expands the aluminum and releases the grip on the bearing. If you drive the bearing out or back in without using heat, it will remove a little material from the bearing boss. If you do this a few times it will wear the hub, your hub will be trash and the new bearings will be loose in the hub. You don't have to heat it too much and it won't get hot enough to damage the paint on painted hubs if properly done. Just heat the bearing boss area using a circular motion and don't hold the torch on any one spot. Heat it until you can sizzle a drop of water or spit on the aluminum. The bearing should almost drop into the hub. It also helps to place the bearing in a plastic bag and put it in your freezer for a couple of hours. This will shrink the outside diameter of the bearing a little bit. This is also the recommended procedure for replacing main bearings, gearbox bearings and other engine case bearings. Or, you could just do what gmc does and get a bigger hammer. :( [/QUOTE]
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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
CR125 rear wheel bearing
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