loose rattling noise

i was basically saying that it makes the noise without the engine running, but the engine turning over, this means i can hear the noise easier, i rode the engine for about 50 miles since new and then it had a catastropic faliure, a grinding noise followed by a massive loss of power and then it wouldnt start, i have take the cylinder head off, and it is full of metal shavings, there is a bad knocking noise now. New engine on the way from the manufacturer as a replacment.
yes, free, however 50 days shipping, I might take the blown motor apart, i have full duplicate sets of parts from failed motors friends gave to me. I'll try to put something together that will work till the new one arrives