Noted @Ozninjaguy. Thank you for the recommendation! I’ll read the manual later about this procedure as well as how to maintain it regularly. I hope I can learn this quick. Thank you!I can't answer whether the shim kits are the right ones. My comment about rocker arms/tappets is for simple motorcycle engines - I didn't even know that your bike runs shims (meaning no rocker arms/tappets)....I was just trying to explain what valve adjustment/clearance meant.
Also, it's not a repair, it's a continual maintenance procedure.
Go and talk to the mechanic at Normanring Motorbikes Davao - they deal with big bikes. Maybe their mechanic can help you out.
btw - you can easily check the clearances - just follow the procedure in the manual and buy some feeler gauges....and Obo and/or Zed7 can tell you the diameter of the relevant shims and whether the ones you are looking at will fit.