| Component | Specification |
|---|---|
| Model / Year | VRSCDX Night Rod Special / 2008 |
| Engine | 1250cc Liquid-cooled Revolution® V-Twin |
| Engine Oil | 20W50 (4.5 L Capacity) |
| Tires (Front/Rear) | F: 120/70 ZR 19 / R: 240/40 R 18 |
| Tire Pressure | F: 2.5 bar (36 psi) / R: 2.9 bar (42 psi) |
| Battery | 65948-00B |
| Spark Plug | Harley-Davidson 10R12A |
Historical Engineering Insight: The 2008 model year represents a landmark in the V-Rod lineage. It was the first year Harley-Davidson increased the Revolution engine’s displacement from 1130cc to 1250cc for the Night Rod Special, while simultaneously introducing the race-bred “Slipper Clutch” (A&S Clutch) to manage the aggressive back-torque of the high-revving Porsche-designed powertrain.
Technical Review: The Dark Powerhouse
The VRSCDX Night Rod Special is the antithesis of traditional air-cooled cruisers. Its liquid-cooled 60-degree V-twin delivers a linear power band that peaks significantly higher than the Big Twin counterparts. The 2008 iteration benefited from the inclusion of Brembo triple-disc brakes and an optional ABS system, addressing the substantial kinetic energy generated by its 125-horsepower output. The 240mm rear tire provides the necessary contact patch for straight-line stability, though it dictates a unique counter-steering effort in tight technical corners.
Maintenance Guide & Technical Requirements
Lubrication System
The 1250cc Revolution engine is thermally demanding. We recommend a high-quality synthetic 20W50 oil. The system capacity is 4.5 liters. Given the high-revving nature of this engine (9,000 RPM redline), oil shear is a primary concern; strictly adhere to 5,000-mile (8,000 km) change intervals.
Chassis and Contact Patch
Correct tire pressure is critical for the VRSCDX’s handling characteristics. Running the 240/40 R 18 rear tire below the recommended 2.9 bar (42 psi) will result in sluggish turn-in and accelerated center-tread wear. The front 120/70 ZR 19 should be maintained at 2.5 bar (36 psi) to ensure steering precision.
Electrical & Ignition
The 2008 model utilizes the 65948-00B battery. Due to the high compression ratio and the draw of the EFI system, maintaining a steady voltage is paramount. We recommend using the OEM 10R12A spark plugs, as they are specifically indexed for the combustion chamber geometry of the Revolution head.
Frequently Asked Questions
What is the torque specification for the 2008 VRSCDX?
The 1250cc engine produces approximately 85 ft-lb (115 Nm) of torque, peaking at 7,000 RPM.
Is the 2008 model ABS standard?
No, ABS was an optional factory feature for the 2008 model year, though it is highly recommended for safety given the bike’s wet weight of approximately 670 lbs.
How often should the coolant be flushed?
To prevent internal corrosion of the aluminum components, the cooling system should be flushed and replaced every 24 months with a silicate-free extended-life coolant.