Honda GOLDWING GL1800/A 2015 Owner's Manual page 159

Maintenance Schedule
The required Maintenance Schedule that follows specifies how often you should
have your motorcycle serviced, and what things need attention. It is essential to
have your motorcycle serviced as scheduled to maintain safe, dependable
performance and proper emission control.
The service intervals in this Maintenance Schedule are based on average riding
conditions. Some items will need more frequent service if you ride in unusually
wet or dusty areas or at full throttle. Consult your dealer for recommendations
applicable to your individual needs and use.
Some items in the Maintenance Schedule can be performed with basic
mechanical skills and hand tools. Procedures for these items are provided in this
manual. Other items involve more extensive procedures and may require special
training, tools, and equipment. We recommend that you have your dealer
perform these tasks unless you have advanced mechanical skills and the
required tools and equipment. Procedures for such items in this schedule are
provided in an official Honda Service Manual available for purchase (page 270).
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Servicing Your Honda