| Quick Specs: Honda CB 1100 R (SC08) | |
|---|---|
| Model Series | SC08 (RC: 1982 / RD: 1983) |
| Engine | 1062cc DOHC 16-Valve Inline-Four |
| Oil Capacity | 4.0 L (SAE 10W-40) |
| Spark Plugs | NGK DPR8EA-9 |
| Tire Sizes | F: 100/90-18 | R: 130/80-18 |
| Battery | YB12A-A |
At MotoSpecsLab, we recognize the Honda CB 1100 R (SC08) not merely as a motorcycle, but as a watershed moment in racing history. A unique engineering highlight of the SC08 is its hand-beaten aluminum fuel tank—a weight-saving measure typically reserved for factory racing prototypes, making the CB 1100 R Honda’s first true ‘homologation special’ designed to dominate production racing classes like the Castrol Six Hour.
Engineering & Performance Pedigree
The SC08, encompassing the RC (1982) and RD (1983) iterations, was the pinnacle of the air-cooled CB lineage. The 1062cc engine featured semi-forged pistons, reinforced crankcases, and a more aggressive cam profile compared to its CB900F sibling. Producing approximately 115hp, the SC08 was a formidable force on the track, characterized by its distinctive red, white, and blue livery and the expansive ‘full fairing’ introduced with the RC variant.
Maintenance Essentials
Maintaining an SC08 requires precision to preserve its vintage value and mechanical integrity. Below are the critical service parameters for the 1982-1983 models:
- Lubrication: The engine requires 4.0 liters of high-quality SAE 10W-40 oil. To protect the wet clutch and internal components, ensure the oil meets API SE/SF or JASO-MA standards.
- Ignition: For optimal combustion and heat range management, the NGK DPR8EA-9 spark plug is the specified standard.
- Electrical: The system relies on a YB12A-A battery. Regular voltage checks are recommended given the age of the charging systems on these classics.
Chassis & Footwork
The SC08 transitioned to 18-inch wheels front and rear, providing a more stable contact patch than the 19-inch setups of earlier eras. For modern riders, selecting the correct tire profile is essential for maintaining the bike’s intended geometry.
- Front Tire: 100/90-18 56V (Pressure: 2.25 bar / 32 psi)
- Rear Tire: 130/80-18 66V (Pressure: 2.50 bar / 36 psi; up to 2.80 bar / 40 psi for high-speed use)
The MotoSpecsLab Verdict
The Honda CB 1100 R SC08 remains one of the most collectible motorcycles of the 1980s. Its combination of hand-finished components and racing success makes it a blue-chip investment. Proper adherence to the technical specifications listed above is paramount for any owner looking to maintain the performance levels that once made this machine the king of the production class.