When I first started talking to him, he said he had just one of the motors off but still together. After talking to him a couple of times, he slipped up and said about the cranks being different because one had a Blue dot and the other had a red dot on it. I said, so you have the motor all apart. He said no. Just have the head off of the one. He also said the one had a new all balls crank in it. Just to many things that I knew was BS. I didn't want to end up with two motors that needed a complete rebuild. I was planing on hearing the one with the chain damage to the case run. I would of known I had one good running motor. I could of used the good case from the other motor to have a good running quad. Can't hear it run if the motors are apart.