Two of them are the adjustment levers for adjustable clutch and brake levers. The other one is to replace the silver one on the gas cap to match my bike.
Very nice! I like having all the same color "little" parts. I am in the process of repainting the bike blue. I have braided lines with blue ends and the adjusters on my levers are the same exact blue. I don't like having 10 different blue pieces on the bike.