05 400 EX Top end rebuild

Hey guys just sold my rzr and made it back to a Honda. Haven’t been on a 400 ex in a while so I picked one up today that’s smoking badly. KID…yes kid said it was a 416 installed by the PO….he bought it a couple months ago and she started smoking soon after of course so coulda been a ring only install done so not sure what it is until I tear it down. I got started on it tonight cause i wanna get this thing on the trails and hopefully get back into the groove that I once was in 14 years ago when u bought a new 02 🙂 I am starting this thread so u guys can give me some pointers on what to do when I’m inside her. Here’s some pics.
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