It might be chain is loose when we take pick up and change the gear and it's get noise U tight your chain and then tell me ur problem is solved or not ...

HI I'm also facing the same issue . with my fzs v3 , I own it on a month back. till first service I have used to go 45 to 50 km h, and after first service. I crossed 60 km h , I felt like after ...