i came down from a wheelie a lil to hard today and i noticed that after i went past 45mph the handle bars were shaking but once speed dropped below 45mph it stopped...could it be possible that i messed up the balance or bent the rim? thanks in advance!!
Might check steering stem bearings if there a little loose you might have put dents in you races. In which case you will have to replace them to fix the problem. Bent rim should be easy to check just put the bike on stands and spin the wheel.