Harley Davidson FLSTFB Softail Fat Boy Lo 2011 Service Manual

Harley's own description of the Lo is that it "brought a darker, slammed appearance to the world of boulevard cruisers." It builds on the Fat Boy legacy with blacked-out finishes and a suspension setup that sits the rider just 24.25 inches off the ground. The Fat Boy Lo debuted in 2010 with the lowest seat height Harley had ever fielded. 2011 was the year a new Security Package option added anti-lock brakes and the Smart Security System.

Power comes from the rigid-mounted, counter-balanced Twin Cam 96B, an air-cooled 1,584cc V-twin with pushrod-operated overhead valves, hydraulic self-adjusting lifters, and Electronic Sequential Port Fuel Injection. It uses a 3.75 x 4.38 inch bore and stroke with a 9.2:1 compression ratio and makes a claimed 93.7 lb-ft (127 Nm) of torque at 3,000 rpm. A chain primary drive (46/34 ratio) feeds a 6-speed Cruise Drive transmission with belt final drive. Reviewers noted that the rigid mounting and balanced engine keep vibration under control at stoplights, and the Fat Boy family's muscular 140mm front tire adds to the road presence.

Confirmed figures list a 94.3-inch overall length, a 24.25-inch laden seat height (26.35 inches unladen), 4.8 inches of ground clearance, a 31.6-degree rake with 5.8 inches of trail, and a 64.5-inch wheelbase. The fuel tank holds 5 gallons and engine oil capacity is 3.5 quarts. Weight is 700 lbs dry and 731 lbs ready to ride. Fuel economy is rated around 35 mpg in the city and 54 mpg on the highway.

This exact 1,584cc Twin Cam 96B configuration is the last year of the Lo on the smaller engine. For 2012 Harley moved it to the Twin Cam 103B.

This factory service manual covers the procedures, torque specs, and diagrams needed to keep a 2011 Softail Fat Boy Lo FLSTFB running the way it was built to.