I noticed the part numbers are different for the 2004 vrs 2006 vrs 2008 camshafts. I am in the process of restoring my 450f and need to replace the camshafts (teeth are worn). I would like to know if there would be an issue installing other year model cams. Yamaha had different part numbers for them, but I am assuming that the only difference is the cam profile. The reason I am asking is, I seen a new set on ebay for a 08 that looks to be an attractive price.
