| Component | Specification |
|---|---|
| Production Years | 2010 – 2022 |
| Engine Oil | SAE 10W-30 (API SG+; JASO MA) – 3.9 Liters |
| Tires (Front/Rear) | 110/80R18 M/C 58V / 140/70R18 M/C 67V |
| Tire Pressure | F: 2.5 bar (36 psi) / R: 2.9 bar (42 psi) |
| Battery | YTZ14S |
| Spark Plug | NGK LMAR8A-9 |
Engineering Heritage: The ‘Engine Song’
The Honda CB 1100 (SC65/B) stands as a unique achievement in modern motorcycling. While the industry pivoted toward liquid-cooling for emissions compliance, Honda chief engineer Mitsuyoshi Kohama insisted on an air-cooled architecture to preserve the ‘aesthetic soul’ of the machine. To achieve this while meeting strict Euro standards, Honda developed the thinnest cooling fins in their history—just 2mm thick—designed specifically to resonate with a particular frequency, creating what Honda engineers call the ‘engine song.’
Technical Analysis: The SC65 Architecture
The 1,140cc DOHC inline-four is a masterclass in thermal management. Despite its retro appearance, the engine features oil-cooling jets directed at the spark plug seats and a sophisticated PGM-FI system. This allows the SC65 to deliver a flat torque curve that peaks at a low 5,000 RPM, providing effortless roll-on power. The chassis, a classic double-cradle steel frame, is paired with 18-inch wheels that offer a deliberate, stable handling characteristic reminiscent of the 1970s superbike era but with modern radial precision.
Maintenance Guide & Service Requirements
Maintaining the SC65 is straightforward but requires adherence to specific fluid standards to ensure the longevity of the air-cooled top end.
Lubrication System
The CB 1100 uses a wet sump system requiring 3.9 liters of SAE 10W-30 oil. It is imperative to use oil with JASO MA certification to protect the wet clutch. Given the air-cooled nature, we recommend shorter change intervals if riding in heavy stop-and-go traffic to prevent thermal degradation of the lubricant.
Ignition & Electrical
The SC65 utilizes NGK LMAR8A-9 spark plugs. These long-reach plugs are critical for heat dissipation in the cylinder head. The electrical system is anchored by the YTZ14S battery, which provides the high cold-cranking amps (CCA) required to turn over the high-displacement 1100cc mill.
Tires and Contact Patch
The 18-inch wheel setup is central to the CB 1100’s geometry. For optimal handling and tire wear, maintain 2.5 bar (36 psi) in the front 110/80R18 and 2.9 bar (42 psi) in the rear 140/70R18. Under-inflation leads to heavy steering and increased scalloping on the front tread.
MotoSpecsLab Verdict
The Honda CB 1100 – SC65/B is more than a retro exercise; it is a high-precision instrument built for the connoisseur. Its mechanical reliability is legendary, provided the owner adheres to the strict oil specifications and spark plug heat ranges defined by Honda’s engineering team.