Honda GOLDWING GL1800/A 2015 Owner's Manual page 172

Cover Removal
Cylinder Head Side Cover Removal
Refer to Safety Precautions on page 154.
Both cylinder head side covers must be removed for spark plug maintenance.
The left cylinder head side cover must be removed for crankcase breather
maintenance.
Removal
1. Remove the rubber plugs.
2. Remove the bolts.
Installation
• Installation can be done in the reverse order of removal.
LEFT SIDE
bolt
cylinder head side cover
rubber plug
169
Servicing Your Honda