I want to adjust valves on my YBR250 cos seems that a maintenance check after my China trip (16000km) skipped this part. I told the mechanics to do that and went off to a shop, returned 15min later and they said its been done. I didnt notice any difference in noise and the engine isnt as nippy as for the first few thousands km. After reading this guide i sure it would take them longer than 15min so they just lied to me.....ehhhh
Ill try to do it myself but im not sure about the numbers, found this online
Intake valve: 0.05 - 0.10mm (0.002 - 0.004inch)
exhaust valve: 0.08 - 0.13mm (0.003 - 0.005inch)

can anyone confirm this?