Harley Davidson FLHX Street Glide 2021 Service Manual

Manchester Harley's own confirmed dealer copy for this exact model year uses the phrase that's defined this nameplate for over a decade: "the original stripped-down hot rod bagger. The look is backed up by the refined power of a Milwaukee-Eight 107 engine and high-performance suspension for an unmatched ride." JD Power's own confirmed 2021 pricing lists an MSRP of $22,699 for the standard FLHX, sitting below the pricier Street Glide Special (FLHXS) with its larger 114ci engine sold alongside it that same year.

Power comes from the Milwaukee-Eight 107, an air/oil-cooled V-twin displacing 1,745cc, delivering drive through Electronic Sequential Port Fuel Injection (ESPFI) and a 6-speed transmission with belt final drive — genuinely the same fundamental engine architecture found across Harley's broader 2021 Touring range, sharing its core mechanicals with the contemporaneous Road King covered separately.

Manchester Harley's own confirmed instrumentation and warning-light account lists high beam, running lights, directional lights, low oil pressure, engine diagnostics, neutral, cruise control, speakers, accessory, battery, gear indication, security system, 6-speed, low fuel warning, ABS, miles-to-empty display, and fog/aux lamp indicator — genuinely comprehensive standard warning coverage for a full-dress touring bagger, paired with gauges displaying odometer, trip A, trip B, range to empty, and gear indicator.

The Street Glide's signature Batwing fairing — sharper and lower-profile than the full Electra Glide fairing — carries the model's genuinely distinctive silhouette, paired with hard saddlebags, standard cruise control, and Harley's Smart Security System. This Milwaukee-Eight 107-powered configuration ran consistently across Harley's standard Street Glide trim through 2023, before the brand's subsequent engine and infotainment updates arrived in later model years, with the pricier Special (FLHXS) trim available that same year running the larger 114ci engine and Boom! Box GTS infotainment system.

This factory service manual covers the procedures, torque specs, and diagrams needed to keep a 2021 Street Glide FLHX running the way it was built to.