I got this atv and it had no compression. I pulled the jug and the wrist pin was seized in the connecting rod!!!! What causes this and can I replace just the top end? There is a few burs in the connecting rod but I think I can smooth them out! Also if this is not a option and I end up doing an engine swap can I up the engine to. 6 or 700??? If so what year engine!?? Any help would be greatly appreciated!!!

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