agar kharaab lower rocker ke saath ooper ke rocker pe adjustment tight kardiye jaaen to engine heat up hoga. common sense hai puranay style ke OHV engine ke liye. Ye kaam bohot hotay dekha hai.
Tight tappet ke saath mixture bhi khench diya jaata hai - aur mazeed heat up honay lagta hai engine.
For reason of my reply which mentions sounds of loose tappets - read post 12 in this thread.
I want to ask you about - dono valve khuley hotay hain aur engine blast marta hai??? - how do you imagine that happening? overlap phase in honda cg125E???
btw - sahee darja haraarat maalom karne ke liye infrared thermometer use kijye cylinder head aur cylinder pe.