Your bike and your money and do whatever you are comfortable with....If your somewhat of a wrench, change your own oil and filter at the initial change at whatever mileage makes you happy, check the rear gear oil yourself, check the tires, fluids etc. and ride on until the 4000 mile check.....The dealer does not do much at 600 miles but get your money.....Most riders on this board, I doubt, have taken their bike into a dealer for the 600 mile check-up!!!...12,000 miles on mine now and I have only been back to the dealer once for the brake re-call and to change the clutch and brake fluids while it was there.....JMHO and ride safe...BTW doing your oil/filter changes etc. will not void the warranty....Just keep some records/receipts of what and when you did the work just in case someone tries to give you a hard time which rarely occurs....