| Component | Specification |
|---|---|
| Production Years | 2007–2012 |
| Engine Oil | H-D 360 20W50 / SYN3 20W50 (2.7 L) |
| Tire Size (Front) | 100/90-19 57H |
| Tire Size (Rear) | 150/80B16 71H |
| Tire Pressure (F/R) | F: 2.1 bar (30 psi) / R: 2.5-2.8 bar (36-40 psi) |
| Battery Model | 65958-04C |
| Spark Plug | Harley-Davidson 6R12 |
The Harley-Davidson XL1200N Nightster, introduced in 2007, was the catalyst for the “Dark Custom” movement. Its historical significance lies in its departure from the traditional chrome-heavy aesthetic of the era, opting instead for a raw, bobber-inspired look with blacked-out rims, fork sliders, and engine covers. From an engineering standpoint, the Nightster was one of the first Sportsters to utilize the side-mounted license plate and integrated stop-turn-tail lights, a design choice that significantly cleaned up the rear fender profile.
Engineering Overview: The Evolution 1200
At the heart of the XL1200N is the rubber-mounted 1200cc Evolution V-Twin engine. This air-cooled powerhouse is known for its reliability and high torque output at low RPMs. By 2007, Harley-Davidson had fully transitioned the Sportster line to Electronic Sequential Port Fuel Injection (ESPFI), which improved cold-start reliability and throttle response compared to the older carbureted models. The Nightster’s low-slung suspension (with only 2.5 inches of rear travel) provides a seat height of just 25.3 inches, making it exceptionally accessible but firm over rough surfaces.
Maintenance Guide & Technical Requirements
Lubrication System
The XL1200N requires high-quality 20W50 oil to handle the thermal loads of an air-cooled V-Twin. We recommend Harley-Davidson 360 for standard use or SYN3 Synthetic for improved heat resistance and extended service intervals. The total oil capacity is 2.7 liters. Always check the oil level when the engine is at operating temperature and the bike is resting on its sidestand.
Chassis & Tires
The Nightster utilizes a 19-inch front and 16-inch rear wheel configuration. Maintaining correct tire pressure is critical for handling, especially given the bike’s limited suspension travel. The front should be kept at 2.1 bar (30 psi). The rear should be 2.5 bar (36 psi) for solo riders, increasing to 2.8 bar (40 psi) when carrying luggage or a passenger to prevent bottoming out.
Electrical & Ignition
The electrical system relies on the 65958-04C battery. Given the high compression of the 1200cc engine, a healthy battery is essential for the starter motor’s performance. For ignition, the 6R12 spark plugs should be inspected every 5,000 miles and replaced every 10,000 miles to ensure optimal combustion efficiency.
MotoSpecsLab Editorial Review
The XL1200N Nightster remains a favorite for enthusiasts seeking a minimalist, aggressive aesthetic. While the short-travel suspension can be punishing on long rides, the engine’s character and the bike’s narrow profile make it an exceptional urban brawler. It represents a pivot point in Harley-Davidson’s history where style and engineering met to attract a younger, more design-conscious demographic.
Frequently Asked Questions
Q: How often should I change the oil in my XL1200N?
A: It is recommended to change the engine oil and filter every 5,000 miles (8,000 km), or annually, whichever comes first.
Q: Can I use aftermarket spark plugs?
A: While aftermarket options exist, the H-D 6R12 is specifically gapped and heat-ranged for the Evolution 1200 engine to prevent pre-detonation.
Q: What is the fuel capacity?
A: The Nightster features a classic 3.3-gallon (12.5 liter) “peanut” tank, emphasizing style over long-distance range.