Jay z800

Hi Admins, please remove if this is not in the right place as I am new here. So I am new to the bike life and recently got a z800 and yesterday I was in gear one, pulled the throttle and let go as i was coming to the end of the road. Normally I used engine braking and my front/rear brake. As I let go of my throttle I heard a loud crunching/clanging noise below me and I could also feel something wobbling/shaking.... its only after I accelerate fast and let go... Any help or advice? Also my chain is tight, not slacking at all.