So a buddy of mine just bought a YXZ and sunk it maybe the second day he owned it. I haven’t personally seen the vehicle but he says that they pulled all of the spark plugs and turned the motor at the crank and it would only turn 3/4th of the way. Personally from my experience I’d imagine it’s bent a rod and some valves if it sucked up as much water as I think it did but I’m not all that familiar with Yamahas and my friend seems to think it’s just bent valves and needs a cylinder head. I have lots of experience with Rover V8’s and BMW’s and he’s asking me to replace the cylinder head but I have a feeling there’s probably more going on that just some bent valves but like I said I’m not familiar with these and haven’t seen the motor in person. What do y’all think about this? Would y’all go ahead and replace the whole engine or throw a head at it? Are the shop manuals readily available? Anybody with experience replacing a head on one of these?