Need help with registration numbers!

[Double Neen Cups]

My yz250f 2008 blew the engine today while I was riding it. I need to buy a new crate motor but the bike itself and the motor will have 2 different serial numbers. Will I have to take care of 2 ownerships? Someone tell me as much as you can about this topic.

 

[Wrench]

No it don't matter as long as ya don't change the vin # on the frame It's Legal, Just don't install a stolen motor
If your buying a factory crate motor and not a used motor, Now your bike is worth more $$$ too.