| Specification | Value |
|---|---|
| Engine Type | Twin Cam 96B (Counterbalanced) |
| Oil Type / Capacity | 20W50 / 2.9 Liters (3.0 Quarts) |
| Front Tire | MH90-21 54H |
| Rear Tire | 200/55R17 78V |
| Spark Plug | Harley-Davidson 6R12 |
| Battery | 65989-97C |
The 2007 Harley-Davidson Softail Night Train (FXSTB/07) stands as a landmark in the Softail lineage. It represents the first year the Night Train received the Twin Cam 96B engine and the 6-speed Cruise Drive transmission, effectively bridging the gap between raw mechanical heritage and modern touring capability. A unique engineering highlight of the ’07 model is the introduction of Electronic Sequential Port Fuel Injection (ESPFI) as standard equipment, which, when paired with the 200mm wide rear tire, transformed the Night Train from a simple cruiser into a performance-oriented drag-style machine.
Engineering Deep Dive: The Twin Cam 96B
Unlike the rubber-mounted engines in the Touring or Dyna lines, the FXSTB utilizes the “B” variant of the Twin Cam engine. This engine is rigid-mounted to the frame, necessitating internal counter-balancers to negate secondary vibrations. This allows for the classic “hardtail” look of the Softail chassis while maintaining rider comfort at highway speeds. The 2007 iteration specifically improved torque delivery by nearly 17% over the previous 88B engines.
Maintenance Guide & Technical Specifications
Lubrication System
For optimal thermal stability in the air-cooled V-Twin, MotoSpecsLab recommends a high-quality synthetic 20W50 oil. The total refill capacity with a filter change is 2.9 Liters. Regular inspection of the primary chaincase and transmission fluid is also vital, as these are separate reservoirs on the FXSTB.
Tires and Contact Patch
The Night Train’s handling is defined by its aggressive geometry—a skinny 21-inch front wheel paired with a massive 200mm rear. Maintaining precise pressures is critical for cornering stability:
- Front (MH90-21): 2.1 bar (30 psi)
- Rear (200/55R17): 2.6 bar (38 psi) for solo riders; increase to 2.9 bar (42 psi) when carrying a passenger or heavy luggage.
Electrical and Ignition
The 2007 model uses the 65989-97C battery, known for its high cold-cranking amps (CCA) required to turn over the large 1584cc cylinders. For ignition, the 6R12 spark plugs should be gapped to 0.038-0.043 inches to ensure consistent combustion under the leaner EFI mapping.
Editor’s Verdict: MotoSpecsLab Review
The FXSTB/07 is the “sweet spot” for collectors and enthusiasts. It retains the minimalist, blacked-out aesthetic that defined the Night Train since 1998 but incorporates the most significant mechanical upgrades in the model’s history. While the 200mm rear tire slightly slows turn-in response compared to earlier 150mm models, the added stability and aggressive stance more than compensate for it. It remains a high-authority choice for riders seeking a pure, visceral Harley-Davidson experience.
Frequently Asked Questions (FAQ)
Q: Can I use 10W40 oil in the Night Train?
A: While 10W40 can be used in very cold climates, the Twin Cam 96B is designed for 20W50 to ensure proper film strength at high operating temperatures.
Q: How often should I change the 6R12 spark plugs?
A: We recommend inspection every 5,000 miles and replacement every 10,000 to 15,000 miles to maintain fuel efficiency and easy starting.