Ive sold two sets of those plastics last year. One set for 550 and the other for 650. Neither set lasted longer then a week on craigslist. Mine had complete graphics tho.
Bought some parts off SandslingerOR. Communication was great and parts arrived safe and just as described. Not to mention he even through in a couple other extra goodies. Thanks for the parts homie!
What kind of cdi are you running? Ive seen a non oem cdi actually fire the motor backwards. He busted multiple sets of cases until he figured out what was going on.