I bought a 2012 YZ450F as a winter project. (don't tell my wife but I may keep this one to ride) I have been looking for a new head for the last month or so. Looking in the usual places. Here in classifieds, eBay and craigslist. Cant seem to find one. Any other places I would be looking? The head I have dropped a valve 2 hours after rebuild. Picture shows the damage. the lifter pockets are scored up a bit also. The I'll bet it could be repaired but thought it would be cheaper and easier to just get a new one. There is one in the classifieds section that I'm interested in but the seller seems to have "disappeared"