If you do take it in (I wouldn't)make sure you tell them you did the oil or they'll do it again. Honestly they don't do much else other then change the oil at 600 hundred - minor cable adjustments, chain adjustment, tire pressure, brake fluid level, ect. You could do all this stuff yourself in under 20 minutes. You've already done about the only thing they have a right to charge you money for. I would call them and ask what else is supposed to get checked and just do it. You should know how to adjust your chain anyway since sooner or later you'll probably have to do it yourself - it's no harder than changing the oil was. The bar swap you have planned will be significantly more difficult then anything that goes on with the 600 mile service.
Keith
