| Component | Specification |
|---|---|
| Production Years | 2009 – 2017 |
| Engine Type | Liquid-cooled, Revolution® V-Twin (Porsche Collaboration) |
| Oil Capacity/Grade | 4.3 L / 20W50 (HD 360 or SYN3) |
| Front Tire | 120/70 ZR 19 (36 psi / 2.5 bar) |
| Rear Tire | 240/40 R 18 (42 psi / 2.9 bar) |
| Battery | YTX14-BS |
| Spark Plug | HD-10R12A (Gap: 0.8–0.9 mm) |
Engineering Highlight: The Harley-Davidson V-ROD MUSCLE (VRSCF) features the legendary ‘Revolution’ engine, a liquid-cooled powerhouse developed in collaboration with Porsche Engineering. To ensure maximum reliability, the engine underwent the ‘Dusseldorf Test,’ which involved 500 hours of continuous high-speed operation at the Porsche proving grounds—a feat unheard of for traditional air-cooled V-twins.
Technical Overview: The VRSCF Evolution
The VRSCF Muscle represents the peak of the VRSC (V-Twin Racing Street Custom) line. Unlike the standard V-Rod, the Muscle introduced a more angular, aggressive aesthetic characterized by dual side exhausts and a 240mm rear tire that defines its stance. From a technical perspective, the liquid-cooled 1250cc engine delivers approximately 122 hp and 86 ft-lb of torque, utilizing dual overhead cams and four valves per cylinder.
Maintenance Protocol
Lubrication System
The VRSCF requires high-performance lubrication to manage the thermal loads of its high-revving engine. We recommend Harley-Davidson 360 20W50 for standard use or Screamin’ Eagle SYN3 Full Synthetic for improved shear stability. The total capacity is 4.3 liters. Always check levels with the bike upright, not on the side stand.
Tires and Chassis
The massive 240mm rear tire is central to the Muscle’s identity but requires strict pressure management to prevent cupping and maintain cornering stability. Maintain 36 psi (2.5 bar) in the front 120/70-19 and 42 psi (2.9 bar) in the rear 240/40-18. Given the torque output, rear tire wear should be inspected every 2,500 miles.
Ignition and Electrical
The VRSCF utilizes HD-10R12A spark plugs. For optimal combustion efficiency, the gap must be precisely set between 0.8 and 0.9 mm. Electrical reliability is anchored by the YTX14-BS battery; given the high compression ratio, ensuring a healthy CCA (Cold Cranking Amps) rating is vital for starting performance.
MotoSpecsLab Verdict
The V-ROD MUSCLE is a masterclass in American power-cruiser engineering. Its Porsche-derived heart offers a level of mechanical sophistication that remains relevant today. Proper adherence to the 20W50 oil requirements and tire pressure specs is mandatory to preserve the unique handling dynamics of this wide-tire machine.