1. Honda Customer Service: You can contact Honda Customer Service and request a copy of the exploded diagram. Honda may be able to provide you with a digital or physical copy of the diagram.
2. Online Manuals: There are many websites that offer Honda Goldwing Aspencade service and repair manuals, which may include exploded diagrams of the engine. Some popular websites include Clymer Manuals, Haynes Manuals, and Honda's official website.
3. Dealerships: Honda dealerships may also have access to exploded diagrams of the GL 1200 engine. You can visit a dealership and inquire about obtaining a diagram.
4. Parts Catalogs: Some parts catalogs, such as those from Honda or independent parts suppliers, may include exploded diagrams of the engine.
5. Third-Party Sources: There are also third-party companies that specialize in providing exploded diagrams and technical drawings for various vehicles and equipment. These companies may have diagrams available for the GL 1200 engine.
It's important to note that some exploded diagrams may be copyrighted material, so make sure to check for any licensing or permissions required before reproducing or distributing the diagrams.