| Specification | Data |
|---|---|
| Model Series | SC79T / 2018 – Present |
| Engine Type | 1,833cc Liquid-cooled 4-stroke 24-valve SOHC Flat-6 |
| Engine Oil | SAE 10W-30 (JASO T 903 MA) |
| Oil Capacity | MT: 3.7 L / DCT: 4.6 L (with filter change) |
| Tires (F/R) | 130/70R18 M/C 63H / 200/55R16 M/C 77H |
| Tire Pressure | Front: 36 psi (2.5 bar) / Rear: 41 psi (2.8 bar) |
| Spark Plug | NGK SILMAR8C9 |
| Battery | GYZ20L |
Engineering Highlight: The Double-Wishbone Revolution
The SC79 generation of the Honda Gold Wing represents the most significant engineering pivot in the model’s 40-year history. Moving away from traditional telescopic forks, Honda implemented a double-wishbone front suspension system. This design separates the suspension’s shock-absorbing function from the steering function, reducing friction by 30% and significantly minimizing nose-dive under heavy braking. This innovation allowed the engine to be moved forward, optimizing weight distribution and shedding nearly 40kg compared to its predecessor, the SC68.
Powertrain and Performance Analysis
At the heart of the SC79 is the redesigned 1,833cc horizontally opposed six-cylinder engine. While the displacement is similar to previous iterations, this unit features a four-valve cylinder head design (SOHC) and Unicam technology. For the first time, Honda offered the 7-speed Dual Clutch Transmission (DCT) alongside the 6-speed manual, providing seamless gear changes that match the touring nature of the machine. The inclusion of Throttle By Wire (TBW) enables four riding modes: Tour, Sport, Econ, and Rain, which adjust both engine mapping and suspension damping settings.
Maintenance Roadmap
To maintain the high-authority performance of the GL 1800, strict adherence to the maintenance schedule is required. The SC79 is a precision machine that demands high-quality lubricants and specific components.
1. Lubrication System
The Gold Wing utilizes SAE 10W-30 oil meeting JASO T 903 MA standards. It is critical to note the capacity difference between transmissions: the Manual Transmission (MT) requires 3.7 liters, whereas the DCT requires 4.6 liters due to the additional hydraulic circuits required for clutch actuation. Always replace the oil filter and, on DCT models, the clutch oil filter during every service interval.
2. Ignition and Electrical
The SC79 uses high-performance NGK SILMAR8C9 iridium spark plugs. These are designed for longevity, but should be inspected for carbon buildup periodically. The electrical system is anchored by the GYZ20L battery, which must be kept at a full charge via a smart-tender if the bike is stored, as the complex onboard electronics (GPS, Airbag, Infotainment) can create a parasitic draw over long periods.
3. Chassis and Tires
Handling precision is dependent on tire condition. The massive 200/55R16 rear tire provides a substantial contact patch but requires consistent pressure management. Maintain 36 psi in the front and 41 psi in the rear to prevent cupping and ensure the longevity of the rubber. Given the weight of the Gold Wing Tour, checking the final drive gear oil every 24,000 miles is also recommended for long-term reliability.
Frequently Asked Questions
Does the SC79 Gold Wing require premium fuel?
Honda recommends 86 octane or higher (unleaded). While premium fuel won’t hurt, the engine is optimized for standard unleaded fuel.
How often should I change the coolant?
The coolant should generally be replaced every 24,000 miles or every 2 years, whichever comes first, to prevent internal corrosion of the aluminum engine blocks.