If you rode a Kawi superbike in the 70/80's like I did the 4 cyl. inline air cooled monsters needed the valve lash adjusted at least yearly and if you rode as I did with the tach on the redline all the time 2x yearly adjustment was called for.
Plan to spend 1/2 a day with your assortment of 200+ shims of varying size. IIRC there were shims with a .005mm difference. It wasn't a simple measure the gap with feelers a select the matching shim. It was figure out what was required for ALL the valves, then build up what was required,