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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
loose sprocket damaged new hub
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[QUOTE="RM_guy, post: 1430153, member: 20652"] Unless you weld the holes and re-drill them the trick is going to be maintaining the clamp load of the bolted joint. The thing that keeps the sprocket from spinning on the hub is the friction between the hub and sprocket that is developed by the clamping load from the bolts. Once the bolts become loose, the clamp load is lost and the sprocket spins. The bolts do not act like pins that keep the sprocket from spinning. If you use JB Weld or press sleeves in you will need a washer on the nut side of the joint to spread the load to the hub to get the right clamp load. Chances are the hole that is now elongated in the hub is such that the nut might either pull through it or start to pull through. In either case it won’t give you the clamp load you need and will easily pull through JB Weld or push a spacer right out. The washer will allow the nut to clamp against solid material that won’t move and will give you a solid joint. You may not have enough room to put a washer in there since it’s usually a pretty tight space. Also, it will need to be thick enough so it doesn’t bend into the JB Weld. If you go the spacer route the washer needs to be large enough to be outside the diameter of the spacer and thick enough to transfer the load to the solid hub material. My recommendation is to have the hub welded or buy a new one with buying a new one as my preference. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
loose sprocket damaged new hub
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