| Attribute | Specification |
|---|---|
| Model Year | 1992 (Limited Edition) |
| Engine Type | Evolution V-Twin 1340cc |
| Oil Type | HD 360 SAE 20W50 |
| Oil Capacity | 2.8 Liters |
| Battery | 65989-90B |
| Spark Plugs | HD-6R12 |
| Tire Size (Front) | 100/90-19 51H |
| Tire Size (Rear) | 130/90-16 67H |
The 1992 Harley-Davidson FXDB-D Dyna Glide Daytona holds a prestigious place in motorcycling history as the first limited-edition model to celebrate the 50th anniversary of the Daytona Bike Week. Engineering-wise, it was one of the early adopters of the refined Dyna chassis, which utilized a two-point rubber engine mounting system to isolate vibration while maintaining the rigid handling characteristics required for high-speed cruising. Only 1,700 units were ever produced, making it a highly sought-after collector’s item today.
Engineering Overview
At the heart of the FXDB-D is the 80-cubic-inch (1340cc) Evolution engine, a powerplant credited with saving the Harley-Davidson brand in the 1980s. In the Daytona configuration, this engine is paired with a five-speed constant-mesh transmission and a low-maintenance belt final drive. The chassis geometry was specifically tuned to provide a balance between the agility of the FXR and the classic aesthetic of the Softail line.
Maintenance Specifications
To maintain the mechanical integrity and resale value of this limited-edition machine, strict adherence to the following technical specifications is required:
Lubrication System
The FXDB-D utilizes a dry-sump lubrication system. For optimal thermal stability and protection of the Evolution engine’s internal components, MotoSpecsLab recommends Harley-Davidson HD 360 SAE 20W50. The total refill capacity with a filter change is 2.8 Liters. It is critical to check levels when the engine is at operating temperature to ensure accuracy.
Wheel and Tire Assembly
The handling dynamics of the Dyna Glide Daytona are highly sensitive to tire condition and pressure. The factory-specified sizes are:
- Front: 100/90-19 51H (Pressure: 2.1 bar / 30 psi)
- Rear: 130/90-16 67H (Pressure: 2.5 bar / 36 psi)
Electrical & Ignition
The ignition system relies on HD-6R12 spark plugs. For reliable starting and to support the vintage electrical architecture, the 65989-90B battery is the standard fitment. Ensure terminals are treated with dielectric grease to prevent corrosion, a common issue in bikes of this era.
Professional Summary
The FXDB-D Dyna Daytona is more than a commemorative paint job; it represents a pivotal era in Harley-Davidson’s engineering transition toward the modern Dyna platform. Proper maintenance using high-zinc oils and maintaining correct tire pressures is essential for preserving the ride quality of this 1340cc Evolution classic.