Welcome to the forum deluxe, Unfortunately all HD dealers are not consistent, some will follow Harley's recommended services and others will sell you everthing they can under the sun. Some will change every fluid compartment every time you come in, whether needed or not, some will even do front forks when their only due every 50,000 miles. A service manual is a very good investment and has all the information on it you'll ever need. Pay attention to "perform annually" in the maintenance requirements. The best thing is to ask the dealer doing the service.