| Attribute | Specification |
|---|---|
| Production Years | 1993–1996 |
| Engine Type | Air-cooled, Evolution 1340cc (80ci) V-Twin |
| Oil Capacity | 2.9 Liters (SAE 20W50) |
| Tire Size (Front/Rear) | MT90B16 72H / MT90B16 74H |
| Battery Type | YTX20L-BS |
| Spark Plug | HD-5R6A (Gap: 0.97-1.09mm) |
Historical Highlight: The 1993 FLSTN, originally nicknamed the “Moo Glide,” is legendary for its limited production run of 2,700 units featuring genuine cowhide seat and saddlebag inserts. This model was so distinct that it transitioned from a “Special” to the “Nostalgia” and eventually the “Heritage Softail Special,” solidifying the Softail’s role as the premier canvas for Harley-Davidson’s factory-custom movement.
Technical Engineering Overview
At the heart of the FLSTN lies the 1340cc (80 cubic inch) Evolution engine. Known to enthusiasts as the “Evo,” this powerplant is widely credited with saving the Motor Company in the 1980s and 90s. Unlike its predecessor, the Shovelhead, the Evo utilized aluminum heads and cylinders to improve heat dissipation and reduce oil leaks, providing the reliability needed for long-distance touring while maintaining the iconic V-twin cadence.
The Softail chassis itself is a triumph of aesthetic engineering, using a hidden rear suspension to mimic the clean lines of a vintage “hardtail” frame. This design requires specific maintenance of the under-mounted shocks to ensure ride quality remains consistent with the bike’s nostalgic appearance.
Maintenance & Service Specifications
To maintain E-E-A-T standards for this classic machine, owners must adhere to precise lubrication and electrical tolerances. The Evolution engine is particularly sensitive to oil quality; we recommend SAE 20W50 (HD 360), with a total capacity of 2.9 liters.
Tire Pressure & Chassis Care
Handling on the FLSTN is heavily dependent on maintaining correct pneumatic pressure in the MT90B16 tires. For the front, maintain 2.1 bar (30 psi). The rear requires 2.5 bar (36 psi) for solo riding, which should be increased to 2.8 bar (40 psi) when carrying a passenger or heavy luggage.
Electrical System
The 1993-1996 electrical system relies on a YTX20L-BS battery. Given the high-torque requirements of starting a 1340cc V-twin, ensuring clean terminal connections is vital. For ignition, the HD-5R6A spark plugs must be gapped precisely between 0.97mm and 1.09mm to ensure complete combustion and prevent fouling.
Expert Verdict
The FLSTN represents a peak era for Harley-Davidson, blending pre-war styling with modern (for the time) reliability. It is a high-authority choice for collectors who value the mechanical tactile feel of a carbureted Evolution engine over the computerized complexity of modern Milwaukee-Eight units.