Hi, I have a lot of job to do on my 2006 yz450f engine (crack in crankcase, crank, piston, timing gear chain, cylinder, ...). Approximatly 1800$. I have the possibility to buy a 2009 engine for 1000$. Does the 09 engine can fit a 06 frame, carb, electronic box, ...? Can I do some modification to fit it? Thank you!