well the main reason for the 600 service is to remove al the metal shaving and bad stuff that has been deposited into your oil during the breakin. some shops will also tighten up your cables and check your brakes and other things such as this but the oil change is the biggest part. dont let them trick you into thinking its a thing only they can do. your best bet is to change your oil and use a manual to check all the little things your self. its a whole lot cheaper.
oh ya and im sure you probably need to tighten your chain if you havent already :cheers
oh ya and im sure you probably need to tighten your chain if you havent already :cheers