Harley Davidson FLS Softail Slim 2016 Service Manual

Harley's own confirmed 2016 factory spec sheet flags a genuine equipment quirk worth knowing about this exact model year: "ABS is standard on all 2016 Softail motorcycles except the Softail Slim model, where it remains an option" — meaning a base 2016 Slim, unlike virtually every other Softail in that year's lineup, genuinely needed ABS specified rather than fitted from the factory as standard. That same spec sheet lists a genuinely new feature for this model year: "electronic throttle control system for enabled cruise control," alongside a "newly designed air cleaner cover with High Output 103 badging" — a real cosmetic update layered onto the same fundamental engine.

Power comes from the High Output Twin Cam 103B, an air-cooled V-twin displacing 1,690cc (103.1 cu in), a 3.87-inch bore and 4.374-inch stroke, a 9.6:1 compression ratio, fed by Electronic Sequential Port Fuel Injection (ESPFI), run through a 34/46-ratio chain primary drive and belt final drive. Paul Blouin Performance's own confirmed factory spec sheet lists gear ratios starting at 9.311:1 in first gear, matching the platform's proven Softail-wide drivetrain.

Harley's own confirmed dealer copy repeats the model's signature description directly: "the perfect blend of classic, raw bobber style and the power of a High Output Twin Cam 103B engine. A modern ride with unmistakable old-iron attitude." That confirmed dimensional data lists a 32.1-degree rake with 5.8 inches of trail on a 64.4-inch wheelbase, a genuinely low 23.8-inch laden seat height (28.2 inches unladen) — one of the lowest in Harley's whole 2016 cruiser range — and 4.9 inches of ground clearance, riding on MT90B16 front and MU85B16 rear tires.

Fuel capacity comes in at 5 gallons with 3.5 quarts of oil (with filter), and shipped weight sits at 677 lbs (706 lbs in running order) per confirmed factory documentation. A range-topping Slim S variant, badged FLSS, ran alongside it that year with the larger 1,803cc (110ci) Screamin' Eagle Twin Cam 110B engine in the same blacked-out bobber body. This exact FLS configuration ran through 2017 before Harley's 2018 Softail platform redesign discontinued the Slim S trim entirely and rebuilt the standard 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 2016 Softail Slim FLS running the way it was built to.