A pivotal moment in touring history occurred in 2018 when Honda introduced the SC79 generation. While previous iterations focused on incremental size, the SC79 was a ground-up redesign that shed a staggering 41kg (90 lbs) compared to its predecessor. Most significantly, it replaced the traditional telescopic forks with a double-wishbone front suspension system, a move inspired by high-end automotive engineering to decouple steering forces from suspension action, providing unparalleled stability at high speeds.
| Specification | Value |
|---|---|
| Model Code | SC79B/18 (Tour DCT + Airbag) |
| Engine Type | 1833cc Liquid-cooled Flat-Six |
| Transmission | 7-Speed Dual Clutch Transmission (DCT) |
| Engine Oil | Pro Honda GN4/HP4 10W-30 JASO T 903 MA |
| Oil Capacity | 4.6 L (Full Change) |
| Spark Plugs | NGK SILMAR8A9S |
| Battery | GYZ20L (High Output) |
| Front Tire | 130/70R18 M/C 63H (2.5 bar / 36 psi) |
| Rear Tire | 200/55R16 M/C 77H (2.8 bar / 41 psi) |
Technical Overview: The DCT and Airbag Integration
The SC79B/18 represents the flagship trim of the Gold Wing lineup. The 7-speed Dual Clutch Transmission (DCT) is specifically tuned for the flat-six engine’s torque curve, offering four riding modes (Tour, Sport, Econ, and Rain). Unlike standard manual versions, the DCT model features a ‘Walking Mode’ (forward and reverse), essential for maneuvering this 383kg machine in tight spaces. Safety is further augmented by the integrated airbag system, which utilizes sensors in the front forks to deploy in the event of a frontal collision.
Maintenance Intervals and Fluids
To maintain the E-E-A-T standards of MotoSpecsLab, we emphasize using the JASO T 903 MA standard oil. The DCT system shares the engine oil, making the quality of the lubricant critical for smooth clutch engagement. We recommend a full oil and filter change every 8,000 miles (12,000 km), though many long-distance tourers prefer a 5,000-mile interval to preserve the DCT solenoids.
Ignition and Electrical
The Gold Wing utilizes NGK SILMAR8A9S Iridium plugs, designed for long service life and consistent ignition under the high thermal loads of a fully dressed tourer. The electrical system is anchored by the GYZ20L battery, which provides the necessary cold cranking amps (CCA) for the high-compression flat-six and the extensive onboard infotainment and safety electronics.
Chassis and Tire Management
The SC79 is sensitive to tire wear. Maintaining the precise pressure of 36 psi (Front) and 41 psi (Rear) is non-negotiable for preserving the neutral handling characteristics provided by the double-wishbone front end. Given the torque output, the rear 200/55R16 tire experiences significant stress during ‘Sport’ mode acceleration; regular inspection for cupping is advised.
Conclusion
The Honda GL 1800 Gold Wing Tour DCT + Airbag (SC79B) remains the gold standard for transcontinental travel. Its blend of automotive-grade suspension, sophisticated DCT logic, and uncompromising safety features makes it a masterclass in motorcycle engineering. Proper adherence to the technical specifications outlined above ensures this flagship machine performs at its peak for decades.