valve adjustments on a YFZ 450
Do yourself a favor and take your investment to a qualified tech for valve adj. no disrespect, but if you have to ask then you probably should not attemt it. removing your cams and properly timing them is crucial and if not done properly WILL result in VERY expensive repairs. If you are experienced or have decent mechanical ability find someone who has done it and have them guide you the first time.
just my $.02