I just rode my bike today, and my dad told me he mixed my gas but it was straight. Well the piston seized to the cylinder and the bottom end is seized. I took it apart and brought it to the dealer. They said it will cost me around 600 bucks for everything. My dad is taking the blame for it, and is paying for the cost. He told me that I could do whatever I wanted with the bike. I was wondering (I've seen alot of people do it lately) if I could throw a XR or DRZ 250 or 400 engine in my RM's frame? What is involved in doing something like this, and if you were in my shoes, what would you do with the bike?