If thay stop making CT is no problem! You gone get new parts from honda next 20 years or more!
I have Blackbird 2005 and ordering any part i want from honda, thay stop making bike 2007!!
I talked with guys from Honda service hier in Croatia thay did not have any adjustment of valves inside 50000km! Yes check but no adjusments. For some riders that make 10000km a year it is every few years so no big deal!!! For me no probs, i have friend and we do it in my garage with koffie brakes and barbecue after😂!!