| Specification | Data |
|---|---|
| Engine Type | Twin Cam 103™ (V-Twin) |
| Oil Grade | Harley-Davidson 360 20W50 |
| Oil Capacity | 3.8 Liters (4.0 US qt) |
| Front Tire | 130/70B18 63H |
| Rear Tire | 180/65B16 81H |
| Tire Pressure (F/R) | 36 PSI / 40 PSI |
| Battery Model | 66010-97D |
| Spark Plug | 6R12 |
The 2011 Harley-Davidson Street Glide (FLHX) represents a pivotal moment in the evolution of the Grand American Touring line. A little-known engineering highlight of the 2011 model year was the standardized integration of the PowerPak upgrade, which brought the 103 cubic inch engine—previously reserved for CVO models—into the mainstream production line, significantly increasing torque output to 102 ft-lb at 3,500 RPM.
Engineering & Performance Analysis
The FLHX/11 utilizes the refined chassis introduced in 2009, featuring a single-spar, rigid backbone frame and a swingarm designed to handle the increased stresses of heavy touring. The 2011 iteration specifically benefited from the 2-1-2 exhaust header pipe, which significantly improved heat dissipation for both the rider and passenger compared to previous configurations.
Maintenance Essentials
For the Editor-in-Chief’s desk at MotoSpecsLab, maintaining the mechanical integrity of the Twin Cam 103 is paramount. Owners must adhere to the 3.8-liter oil capacity using H-D 360 20W50. Deviating from this viscosity can lead to increased valve train noise and sub-optimal hydraulic lifter performance in high-temperature environments.
Tires and Contact Patch
The 2011 Street Glide demands precision in its footprint. The front 18-inch wheel is paired with a 130/70B18 63H tire, while the rear utilizes a wide 180/65B16 81H. To maintain the ‘Glide’s’ signature handling characteristics and prevent cupping, pressures must be maintained at 36 psi (Front) and 40 psi (Rear).
Electrical and Ignition
The electrical system is anchored by the 66010-97D battery, a high-CCA unit necessary to turn over the high-compression 103ci cylinders. For ignition, the 6R12 spark plugs remain the gold standard, providing the necessary heat range to prevent pre-detonation under heavy load.
MotoSpecsLab Verdict
The 2011 FLHX is a ‘sweet spot’ for collectors and riders alike, offering the modern 103ci power plant without the added electronic complexity of the later Rushmore or Milwaukee-Eight generations. It remains a benchmark for the ‘Bagger’ aesthetic.
Frequently Asked Questions
What is the oil capacity for the FLHX 2011?
The total refill capacity with a filter change is 3.8 Liters (approximately 4.0 US quarts).
What spark plugs are recommended?
The factory-recommended spark plug is the Harley-Davidson 6R12.