| Component | Specification |
|---|---|
| Engine | Twin Cam 103™ (1690cc) |
| Oil Type | Harley-Davidson 360 20W50 |
| Oil Capacity | 3.8 L (4.0 US qt) |
| Front Tire | 130/80B17 65H |
| Rear Tire | 180/65B16 81H |
| Tire Pressure (F/R) | 36 PSI / 40 PSI |
| Spark Plug | HD-6R12 |
| Battery | 66010-97D |
The 2011 Harley-Davidson Electra Glide Ultra Classic (FLHTCU) represents a definitive moment in the Motor Company’s touring evolution. While the 2009 frame redesign provided the structural foundation, 2011 was the pivotal year the Twin Cam 103™ engine became the standard powertrain for the Ultra Classic, a displacement previously reserved for CVO models and optional upgrades. This change provided the necessary torque increase to handle the bike’s substantial 900-lb wet weight with ease.
Engineering Analysis: The Twin Cam 103 Platform
The FLHTCU/11 is powered by the air-cooled Twin Cam 103 with Integrated Oil-Cooler. This 1690cc V-Twin features Electronic Sequential Port Fuel Injection (ESPFI), delivering a peak torque of 102 ft-lb at 3500 RPM. From a technical standpoint, the 2011 model benefited from the refined 6-Speed Cruise Drive transmission and the isolated drive system (IDS) which significantly reduced driveline noise and vibration during highway cruising.
Maintenance Protocol & Fluid Specifications
To maintain the longevity of the FLHTCU, adherence to the following technical specifications is mandatory for MotoSpecsLab certification:
- Lubrication: Use 3.8 Liters of Harley-Davidson 360 20W50. For extreme temperature operation, synthetic Screamin’ Eagle Syn3 is a viable alternative to prevent thermal breakdown in the rear cylinder.
- Ignition System: The HD-6R12 spark plugs are specifically gapped for the Twin Cam 103’s compression ratio. Check gaps every 5,000 miles.
- Electrical: The 66010-97D battery provides the high cold-cranking amps (CCA) required to turn over the large displacement pistons. Ensure terminals are treated with dielectric grease to prevent corrosion.
Chassis and Contact Patch
The 2011 FLHTCU utilizes a 17-inch front wheel and a 16-inch rear wheel, a combination designed to balance turn-in agility with load-bearing stability. Tire pressure is critical: Running below 36 psi in the front or 40 psi in the rear on this heavy touring frame can lead to ‘cupping’ and unstable low-speed handling.
MotoSpecsLab Editorial Verdict
The 2011 FLHTCU is widely regarded by technicians as a ‘sweet spot’ in the used market. It possesses the modern 103ci power and the robust 2009+ frame, but lacks the complexity of the later ‘Project Rushmore’ liquid-cooled heads. It remains a benchmark for long-haul reliability and mechanical serviceability.