Hardened? Most of the stuff on this bike is Chinesium and soft.
Start with a center punch, and dimple the heck out of the bolt. So you guarantee the drill bit won't walk. Then drill with a small bit. Follow up with the right bit for the extractor. Use cutting lube during this process, I very highly recommend Tap Magic. It really is magic.
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2016 RX3
2002 Honda CBR1100XX
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