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Head bolts!!!

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I'm planning on sending my cylinder head in to get the valves redone, So far, everythings gone smoothly in removing it, but now the last step is the allen head bolts that are inside the head, under where the cams would normaly be. They are in there very tight, and I'm afraid I'm going to strip them, the allen wrench I was using was just starting so slip. Does anyone who has taken their head off before have any tips to getting these things off? the outside head bolts have come loose fine, its just the inner ones. The bike is a 2002 YZ250F if that helps any.

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I did the same thing. Started using an allen wrench and felt like I was going to strip them. Them I noticed a regular socket would work.

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I think they hollowed the inside to save weight.

You wouldnt have room for a bolthead and a socket. It wasnt weight.

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