76GMC1500 said:When someone mentioned tap it out, what they meant was to drill the bolt through the center, and use a tap to cut new threads. QUOTE]
The problem with drilling it out is you can't get a straight shot at the broken bolt. Have you actually ever done this GMC?
There are a couple of ways to remove your broken bolt. First, understand what happens to cause this. Usually it is oxidation from the inside of the swingarm caused by water or moisture in the swingarm itself. Using hot water to wash your bike can cause condensation inside the swingarm and corrode the steel bolt to the aluminum threads. The part that sticks into the inside of the swingarm is most likely heavily corroded on the threads.
Once the bolt becomes corroded, it is almost impossible to remove it using traditional methods. There are two ways to remove it. First, take it to a shop and have someone tig weld or wire weld a nut on the exposed part of the broken bolt. Heat the area around the bolt and work the bolt back and forth until it loosens up and then back it out. Also, soak it in a penetrating lube as Jay suggested before taking it to the shop. Usually, just the heat from welding the nut on is enough to loosen the bolt.
If that doesn't work, your bolt is too corroded and you will have to have it removed using a EDM, (electronic discharge machine). Check in your phone book for an EDM company. They can disintegrate the steel bolt with the EDM without damaging the aluminum threads. They are not that expensive compared to the price of a new swingarm.
Just my $ .02
Actually, it's pretty easy with a decent angle plate. But somehow I doubt he has a Bridgeport or a good quality drill press in his garage. It's pretty clear that this is going to be beyond his means to do at home.Ol'89r said:Also, due to the length of a swingarm, it is difficult to jig it up in a vertical mill or drill press.
MasonW947 said:Haul your bike to a local mechanic and have him weild a bolt head to it.
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