Last week I traded an XR100 for an 04 YZ450F with a big hole in the right case by the kick starter. Since this area supports the kick starter, it is a fairly involved fix. One of the previous owners had fixed it at some point using a welded on piece of some sort. In any case, it didn't hold, and I don't want to be stressing about it breaking when I am out in the middle of no where. Ideally, I'd like to just replace the right side case. So I know that the cases are line bored at the factory and that mixing and matching cases can be problematic since there could be misalignment where there are through bores. But I an wondering if it would be possible to get a replacement right half on eBay and take both halves to a machinist and have him check it out and correct any alignment issues? What think. Has anyone done this? Or do I really have to get a full replacement on both cases?