So i got my bike and had a bikeshop put it together and i started riding it and i jumped my ramps and i got a bad landing with front tire land first , so then i rode around and noticed the bars wobbling, i looked at it and bars and stem are tight and are good bit then under the stem i think its the headset and the top cap is shaking with the bars and stem , what do i have to tighten to fix??? Please help , thanks