Join Date: Sep 2020
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I downloaded the owner's manual and took a look in there but it wasn't listed, only the frame VIN.
That said, from my experience with Yamaha motorcycles, the engine serial number is always located on one of the engine cases. If the case is horizontally split (upper/lower cases) the serial number will be on the upper case. For vertically split cases (left/right cases), the serial number will be found on the deck that the cylinder rests on. I forget whether it's typically the left or right case. I have relatively little experience with Yamaha ATV's, so I hope this helps and is even close to correct.