So I have a Beautiful 1998 rm 250 that was just rebuilt and had all the bushels and berrings replaced and new tires and all that jaz. I have it up on craigslist for sale or trade, and someone messaged me on a trade today. He wants to trade (2) 2002 yz250f's for my dirtbike. the catch is one of them has a bad bottom end and one has a bad top end. I was wondering if it would be possible to take the good top end and good bottom end and put them both on the same frame..