| Specification | Value |
|---|---|
| Production Years | 1985 – 1987 |
| Engine Type | Air-cooled, Parallel Twin, 3-Valves per Cylinder |
| Oil Specification | SAE 10W-40 (JASO MA/MA2) |
| Oil Capacity | 2.2 Liters |
| Tire Dimensions | F: 100/90-19 | R: 110/90-18 |
| Battery Type | YB12A-A |
| Spark Plug | NGK DR8ES-L (0.6 – 0.7 mm gap) |
A unique engineering highlight of the Honda CB 450 N (PC14) is its sophisticated three-valve cylinder head design—utilizing two intake valves and one exhaust valve per cylinder. This configuration was specifically engineered to optimize gas flow and combustion efficiency at mid-range RPMs, a design philosophy that allowed this parallel twin to outperform many of its contemporary four-cylinder rivals in real-world urban torque delivery.
Engineering Overview
The PC14 represents the final evolution of Honda’s mid-sized twin-cylinder lineage in the mid-80s. Unlike the earlier CB450 models, the ‘N’ variant featured more modern ‘Euro-style’ aesthetics and a chassis tuned for stability. The engine remains the centerpiece: an air-cooled SOHC unit that is remarkably resilient to high-mileage wear, provided the oil quality is strictly maintained.
Maintenance & Service Specifications
For the professional technician or the dedicated owner, adhering to the following specifications is critical for preserving the PC14’s mechanical integrity:
1. Lubrication System
The CB 450 N requires 2.2 liters of SAE 10W-40 oil. It is imperative to use oil with JASO MA or MA2 certification to ensure the wet clutch does not slip. Given the air-cooled nature of the PC14, frequent oil changes (every 5,000 km) are recommended to prevent thermal degradation.
2. Ignition & Electrical
The electrical system relies on a YB12A-A battery. For optimal combustion, use NGK DR8ES-L spark plugs. The gap must be precisely set between 0.6 and 0.7 mm to prevent misfires under load. Even a slight deviation in this gap can lead to poor idling and increased fuel consumption.
3. Chassis & Tires
The PC14 utilizes a 19-inch front and 18-inch rear wheel setup. Proper inflation is vital for handling predictability:
- Front (100/90-19): 2.0 bar (29 psi)
- Rear (110/90-18): 2.25 bar (33 psi) for solo riding; 2.8 bar (41 psi) for pillion/heavy loads.
Editorial Verdict
The Honda CB 450 N (PC14) is a testament to Honda’s era of over-engineering. While it may not possess the raw power of the later CB500 series, its mechanical character and the unique 3-valve delivery make it a connoisseur’s choice. Maintenance is straightforward, making it an excellent candidate for enthusiasts who value technical transparency and reliability.