I have not had any engine work done by him, but have seen him working on CBRs. Though he is again an illiterate mechanic, but an experienced one and works better than others in Noida. In my case, I rarely visit ASCs and that too for spares only -- I prefer to work on my rides by myself. Malwa Honda in Okhla has also good reviews if you want to go there.
I listened those audio clips again. It felt more of slapping noise to me which I told you earlier. When main bearings go kaput or the big end bearing fails, the thud sound is kind of more sharp which I did not find in your audio clips; however, it does not warrant if that is the real case. The main cause of main bearing fail is scarcity of oil supply or no oil. I would suggest to start with head and block first before going ahead opening up the crankcase. If there is any visible fault (scored cylinder wall/piston/rings), would be dealt without opening up the engine. If some faults at crankshaft or con-rod big end, it definitely would need to be opened.
I am used to listen such slapping noises in my 2-strokes rides when bore clearance goes out of specs and it needs re-boring. I would also advise to consult a Honda Engineer and get the work done under his supervision.
Thank you,




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