1984–1999 Harley-Davidson Softail FXST, FXSTC, FXSTS, FLST, FLSTC, FLSTF, and FLSTN OEM Service & Repair Manual

• Covers 1984–1999 Harley-Davidson 1340 cc Evolution Softail models, including FXST, FXSTC, FXSTS, FLST, FLSTC, FLSTF, and FLSTN, with the 1995–1999 supplement adding FXSTB Night Train, FXSTSB Bad Boy, and FLSTS Heritage Springer coverage.
• Details engine removal and overhaul through rocker arms, cylinder heads, valves, cylinders, pistons, pushrods, tappets, oil pump, timing gears, crankcase, and crankshaft, with inspection, measurement, reassembly, and break-in procedures.
• Covers the early-1984 dry clutch, late-1984–1989 and 1990-on wet clutches, compensating sprocket, primary chaincase, 1984–1988 starter drive, 1989-on starter jackshaft, and complete 4-speed and 5-speed transmission repair.
• Includes Keihin and CV carburetor service and rejetting, fuel tanks and shutoff valves, exhaust and California emission systems, battery and charging work, ignition, starter solenoids, relays, switches, turn-signal modules, and circuit breakers.
• Covers wheels, hubs, laced and cast wheels, chain and belt drives, telescopic and Springer front ends, steering, rear shocks and swing arm, disc brakes and bleeding, fenders, saddlebags, frame inspection, and frame repainting.
• Provides model-specific 1984–1999 wiring diagrams, Quick Reference Data, torque tables, capacities, wear limits, electrical test specifications, and special-tool callouts for engine, drivetrain, suspension, and brake work.

Model and Year-Break Coverage

This 651-page PDF service and repair manual is organized as a full workshop book, not a short diagnostic extract. Chapters One through Fifteen cover general information, troubleshooting, maintenance, engine, clutch and primary drive, both transmission types, fuel and electrical systems, wheels, suspension, brakes, and frame and body service. Chapter Sixteen groups procedures unique to 1995–1999 models; Chapter Seventeen is the index, and Chapter Eighteen contains the wiring diagrams.

The model-identification tables track the early FXST range, the later Custom, Springer, Classic, Fat Boy, and Heritage variants, and the added 1995–1999 Night Train, Bad Boy, and Heritage Springer models. The supplement is important because later changes are not simply folded into every earlier chapter. It separately covers items such as 1996–1999 engine removal, 1998–1999 wet-clutch and primary-drive changes, 1996–1999 control systems, 1997–1999 switches and turn-signal modules, 1998–1999 battery service, later wheels and hubs, Springer forks, brakes, and fenders.

Repair, Overhaul, and Diagnostic Depth

The engine chapter moves from in-frame service and engine removal into rocker-arm and cylinder-head work, valve and valve-guide service, cylinder and piston inspection, pushrods and tappets, oil-pump repair, timing gears, crankcase and crankshaft service, and final break-in. Inspection sections include wear measurements, bore and runout checks, gasket-surface evaluation, torque sequences, and component-specific specifications. Special-tool references include HD-34643 with driver handle HD-34740 for valve-guide seals and HD-33446 torque plates for cylinder measurement under simulated clamping load.

Powertrain coverage is split by actual build differences. Chapter Five separates the early-1984 FXST dry clutch from late-1984–1989 and 1990-on wet-clutch assemblies, then covers the primary chain, compensating sprocket, chaincase, electric starter drive, and later starter jackshaft. The 4-speed chapter covers the 1984–1985 FXST unit, including transmission removal, shifter cover and fork service, kickstarter and starter-clutch work, side-cover service, and shifter adjustment. The 5-speed chapter covers 1986 and later models, with shift-cam assemblies, forks, gears, shafts, case and side-cover work, inspection, reassembly, and adjustments, including the late-1991 shifter-cam change and the 1994 domestic-versus-HDI (international-market) production gear sets.

Fuel and electrical repair goes well beyond basic tune-up data. The manual separates the 1984–1989 Keihin carburetor from the 1990-on CV unit, with removal, cleaning, inspection, assembly, rejetting, throttle and choke/enrichener cable replacement, fuel-tank and shutoff-valve service, exhaust work, 1985–1991 California emission controls, and 1992-on California evaporative-emission systems. Troubleshooting chapters cover no-start, charging, ignition, fuel delivery, engine noise, lubrication, clutch, transmission, vibration, steering, and braking faults. The electrical chapter adds battery service, alternator and regulator work, ignition coils and modules, year-specific starter solenoids, relays, horn, switches, circuit breakers, and the 1991-on turn-signal module.

Chassis, Diagrams, and Reference Data

Separate chassis chapters cover front and rear wheels, hub and bearing repair, laced-wheel and cast-wheel service, wheel balance, tube-type and tubeless tire repair, drive chain and belt service, telescopic-fork overhaul, steering-head bearings, Springer front-fork service, rear shocks, swing-arm work, hydraulic brake repair and bleeding, body panels, saddlebags, frame inspection, and repainting.

The wiring section is model- and year-specific rather than a single generic schematic. Examples include 1984 FXST, early 1985 FXST/C, late 1985–1986 FXST/C, 1989–1990 FXST/C/S and 1990 FLSTF, separate 1993 domestic and HDI sheets, and later 1996–1999 domestic/HDI main-harness, lighting, instrument, and headlight diagrams. Quick Reference Data consolidates tire pressures, approved oils and fluids, engine and drivetrain capacities, fork-oil data, tune-up and carburetor specifications, electrical and starter tests, clutch and brake limits, circuit-breaker ratings, and major tightening torques.

Several cautions prevent expensive mistakes. The 1994 domestic and HDI 5-speed ratio gears must not be intermixed because mismatched sets can damage mating gears. Cylinder-head O-rings, gasket orientation, and position-coded pushrods must stay in their specified locations to avoid leaks or valve-train problems. Brake service requires DOT 5 fluid; the manual also warns that solvent can swell and distort hydraulic seals, and any opened brake line requires bleeding.

Secure the motorcycle before lifting, isolate the battery where specified, and control fuel, brake-fluid, and spring-load hazards before disassembly.