No no bro.... its not from brake shoe or anyother stuff... 100% sure its from engine block...
I just used brake to put load on engine other wise if it was brake shoe then this sound shouldnt come while running... engine is under load when we are riding the bike so i pressed brake to put some pressure on engine. Hope you understand.
By the way I got changed the small garrari (Atlas genuine 280Rs) the day before yesterday and after running couple of km now i feel 30% reduction in this noise... Yesterday maniac was busy so will take it today evening again to change large garrari and bearing change as he said he will not take labor for again opening it if still issue not fixed by changing small gear 