With zero experience it can be done but you ideally will have some mechanical aptitude and need to follow instructions well. Also, 550 and 500s need to loosen the adjusters and rubber band the rocker arms up when installing the cover so you don't accidentally bend or break something, which is apt to occur if you do not assemble it correctly. It is referred to as the rubber band trick, if you care to search for it. MRiech MRieck (sorry Mike) does excellent quality work on heads and valves, knowing the SOHC/4 motors very well and is able to produce excellent results. Definitely not true for just any shop, actually few shops understand the SOHC4 motors half as well as Mike.