Buell Lightning XB12S / XB9SX 2005 Service Manual (P/N 99490-05Y)

The 2005 Buell Lightning Models Service Manual, P/N 99490-05Y, covers the Lightning XB12S and XB9SX, with XB12SCG-specific chassis dimensions and suspension settings.

Searchable PDFs and Split-File Layout

Text search and diagram detail: PDF text is searchable. Embedded bookmarks are present in 21 files; the eight separate contents PDFs have none. Small labels in the dense wiring diagrams require zooming.

The ZIP contains 29 printable PDFs totaling 594 pages. That total includes seven blank contents pages, nine Notes pages, seven diagram-title-only pages in Appendix B, and one production-print page dated June 30, 2004.

Lightning Engine, Chassis, and Electrical Service

These selected service topics outline the repair coverage rather than reproduce the full contents. Further topics include molded-in-color and translucent panel care and headlight aiming.

• Scheduled maintenance: Battery and lubrication service, clutch and primary-chain adjustment, drive-belt inspection, suspension damping, steering-head checks, TPS calibration, storage, and troubleshooting.

• Chassis repair: Wheel-bearing replacement, tire service, rim and rotor checks, brake hydraulics and bleeding, front-fork overhaul, steering bearings, swingarm, isolators, and rear-shock removal.

• Engine repair: XB-specific engine rotation and removal, installation, cylinder-head repair, cylinder and piston inspection, lubrication diagnosis, oil-pump service, hydraulic lifters, cam timing, and crankcase work.

• Drive and transmission: Clutch-pack and release-mechanism repair, primary and belt drives, transmission disassembly, shaft and gear inspection, case bearings, shifter, and sprocket service.

• Starter diagnosis: Activation-circuit and voltage-drop checks, on-bike and free-running current-draw tests, starter disassembly and repair, and solenoid testing and service.

• Fuel-system service: Selected DDFI trouble-code charts, ECM and sensor replacement, cooling-fan service, fuel-pump repair, throttle-body and intake-manifold work, intake-leak testing, and EVAP service.

• Electrical troubleshooting: Ignition, starter interlock, XB12 interactive exhaust, charging, lighting, instruments, fuses, and harness service, supported by wiring diagrams and electrical test data.

Suited to mechanically qualified owners and technicians with the equipment needed for the work; TPS calibration and several diagnostic checks require Digital Technician or dedicated test tools.

XB-Specific Configurations

XB9SX material covers wind deflectors, the headlight grille, intake-cover X-Guard, tire applications, its dedicated sprocket-locking tool, and V-shaped front-intake-cam timing marks. XB12 coverage adds the interactive exhaust cable, muffler-valve actuator, and related harness.

The low-seat XB12SCG has a separate suspension-setting table and dimensional references. These distinctions help match setup information and component procedures to the actual configuration.

Chassis Repair and Installation Details

Wheel-bearing work identifies the B-43993-series collets and HD-44060 remover/installer. Brake chapters extend into master-cylinder and caliper disassembly, piston inspection, reassembly, and bleeding. Fork service provides step-by-step instructions for disassembly, seal and bushing service, spring compression, oil filling, and assembly.

Steering-head bearing replacement, swingarm and brace work, engine isolators, rear-shock removal, body assemblies, and controls are also documented.

The wheel-bearing instructions explain how incorrect spacer alignment can draw a bearing into the hub crooked. The swingarm section warns that removing the brace with belt tension still applied can damage the brace.

Engine and Transmission Overhaul

Engine coverage continues into valve and guide inspection, rocker assemblies, cylinder and piston measurement, lubrication testing, the oil pump, hydraulic lifters, and crankcase repair. Compression and cylinder-leakage tests help distinguish ring, valve, and head-gasket leakage before teardown.

Gearcase instructions address cover removal without prying and the XB9SX-specific V-mark indexing and cam-gear installation order.

Internal transmission service requires engine removal and crankcase separation. The procedures cover mainshaft and countershaft disassembly, gear inspection, main-drive gear and case bearings, shifter work, and final installation.

Fuel Diagnostics and File-Scope Limits

Fuel System pages 4-3 through 4-42 are absent. The supplied section contains pages 4-1 and 4-2, then resumes with Trouble Code 11 on page 4-43.

The omitted range includes the DDFI overview, introductory code-reading and check-engine-lamp procedures, Breakout Box and Wiggle Test setup, no-start and no-ECM-power diagnosis, fuel-pressure testing, idle control, and misfire sections.

The supplied code chapters span selected codes from 11 through 56. Early- and late-model-year fuel pumps have separate repair procedures and are distinguished by harness location. Pump service includes regulator, filter, screen, low-fuel sensor, and wiring-harness replacement.

The manual also distinguishes injector applications between the two engine sizes and between front and rear cylinders. California evaporative-emissions hardware is treated separately.

Circuit Diagrams, Test Equipment, and Routing

Representative illustrations include Cam and Pinion Gear Location and Timing Mark Indexing, ECM Wiring, 2005 Lightning Models Main Harness, Engine Management Circuit, Starting Circuit, and Charging Circuit.

Appendix B adds connector cutaway views, terminal removal and crimping for Amp Multilock, Deutsch, and Packard connectors, plus a connector-location table. Appendix D maps brake hoses, EVAP lines, the main harness, oil lines, and control cables.

Appendix E covers Japanese-market active-intake adjustment, its system schematic, Digital Technician activation, and Code 22 diagnosis.

The tool appendix identifies the B-45521 steering-head bearing tool, HD-45966 fork spring compressor, HD-43984 crankshaft locking tool, and HD-38515-A clutch spring compressor. Fuel diagnosis references the HD-42682 Breakout Box and HD-44750 Digital Technician.

Factory reference data includes torque tables, capacities, suspension settings, runout and wear limits, transmission inspection data, and charging specifications.

Brake, steering, wheel-bearing, fuel-system, engine-support, and drivetrain work requires the correct fixtures, service skill, and final inspection before the motorcycle is returned to service.

Examples of Engine Wear Limits and Charging Test Data

For the covered engines, the piston-ring table lists a new-component compression-ring gap of 0.007–0.020 in. and a service wear limit of 0.032 in. These are inspection references for the top and second compression rings.

The charging-system AC output check specifies 32–40 VAC at 2,000 engine RPM across the stator socket pairs. This is an alternator test value, distinct from regulated DC charging voltage.