Harley Davidson FLS Softail Slim Base 2015 Service Manual

Motoplanete's own detailed retrospective traces the genuine styling lineage Harley drew on for this exact bobber-inspired platform: "since the second decade of the 21st century, Harley-Davidson has been repackaging its post-war history in a variety of ways. The Slim is yet another example. At that time, bikers removed all superfluous items from their machines to keep only the essentials. Milwaukee tries to clean up this FLS in the same way, with a solo seat, less chrome, a truncated rear mudguard, the front fender is halved, the tires are narrow and the rims are very airy" — a deliberate contrast with the fuller-bodied Fat Boy sharing the same fundamental platform lineage.

Power comes from the air-cooled Twin Cam 103B, a 1,690cc rigid-mounted V-twin with a counter-balance shaft, automatic compression release (ACR), a 3.87-inch bore and 4.374-inch stroke, and a 9.6:1 compression ratio, fed by Electronic Sequential Port Fuel Injection, delivering a claimed 97.4 lb-ft (132 Nm) of torque at 3,000-3,250 rpm through a 6-speed Cruise Drive transmission with belt final drive. Motoplanete's own confirmed performance figures list a genuine 170 km/h (106 mph) top speed and 305kg (672 lb) dry weight.

Eisenhauer's Tioga County Harley's own confirmed factory spec sheet — explicitly badged "Base" trim, matching your listing — lists a genuinely low 23.8-inch laden seat height (25.6 inches unladen) based on a 180-lb operator, 4.5 inches of ground clearance, a 32.1-degree rake with 5.8 inches of trail, and a 64.4-inch wheelbase, riding on MT90B16 front and MU85B16 rear Dunlop tires. TotalMotorcycle's own confirmed dealer copy describes the genuine period-correct detailing built into this trim: "unique retro-inspired handlebars call back to the glory days of 1940s bobbers, while the gloss-black headlamp cover and the 'Cat Eye' console with its retro speedo face add even more swing-era swagger," paired with a low-slung solo saddle and the model's signature hidden rear shocks preserving a vintage hardtail silhouette.

Confirmed fluid capacities list a 5-gallon fuel tank and 3.5 quarts of oil (with filter), with shipped weight at 672 lbs rising to 701 lbs in running order. 2015 US pricing started at $15,899 for Vivid Black. This exact base-trim configuration ran through 2017 before Harley's 2018 Softail platform redesign discontinued the standalone Slim S variant entirely and rebuilt the Slim on the new single-shock, Milwaukee-Eight-powered chassis.

This factory service manual covers the procedures, torque specs, and diagrams needed to keep a 2015 Softail Slim FLS Base running the way it was built to.