Not sure if anyone can help but looking for some potential input. I'm not the most knowledgeable with motors or internals. Guy bought some oem parts off of me from my track build for a crashed 2015 zx10r he purchased with 4.6k miles. He asked if I could help him get it started. Once I saw it I told him it was not going to be worth rebuilding due to a hole in the frame. It was sold to him as running perfect just needed work, but of course that wasn't the case because he couldn't get any power to it. I found the main fuse blown and the power-commander actually had a damaged ground wire. Put in the new fuse and pulled the power-commander and it started up. He said he had just changed the oil too. Started it up and then turned it off after a few seconds while we talked about what we did. Before starting it back up I noticed the oil already turned creamy. I came to find out that the airbox had a crack in it and I'm guessing the bike spent time in the tow lot and collected a lot of water and dumped it into the motor through the throttle bodies. Well he went to flush the oil again and said it sounded fine for a few seconds but started sounding like a huge knock/banging internally. Instantly shut it off. My question is any guess what most likely gave and how much the motor would be worth in just parts? Offered to sell it off to me and gave me a price but I would have zero clue what to ask for the motor.