I recently bought a 2000 f4 non running and got it running problem is whenever I tilt/ lean the bike to the side just a little bit the bike will die on me and wont stsrt up again until I straighten it perfectly 90° and let it sit for a min. Has anyone run Into this problem?

 

Have carbs been fully restored?
Most likely float-levels aren’t correct.

 

definitely sounds like float issues. take the carbs off and go through them.