650L head gasket for JE 100mm piston?

I have a JE 100mm piston in my '97 XR600R; is there any reason I can't use the OEM XR650L head gasket? I think that stock bore for an XR650L is 100mm, so it should work. But I've made enough stupid little expensive mistakes lately, and I don't want to make any more...

3 mm bigger than stock i would think the stock would be fine as long as the fire ring is sticking in to the cyclinder shouldnt though

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