One of Suzuki mechanic stated that the reason of this noise may be that the small chain sprocket has only 14teeth while it must be >=15 as Suzuki GS. That's also the reason that the bike is not going beyond 110km/h.
Yar ye bike lay k to hath ho gya hay. Itni costly bhi hay but 1 to ye chain sprocket noise and doosra ye k jeb bike k gears pay load aata hay jaisay kisi bhi gear mein rekh k speed khainchi jaati hay to gears mein say bhi noises aati hen.
Ye wo noise nehen jo k us weqt aati hay jeb small gear mein rekh ker zor legaya jata hay (mean kerrrrkerrkerr ki aawaz).
Other Suzuki GR150 users ko bhi yehi problem hay. As usual, Suzuki Pakistan, who just know how to sale but don't know how to deal with problem after sale, don't have any solution.