1987–2004 Suzuki VS1400 Intruder Service Manual (P/N 99500-39156-03E)

• Suzuki Motor Corporation factory service publication P/N 99500-39156-03E, copyright 1990; 467 PDF pages. The manual is organized into 21 numbered service groups plus a separate appendix, beginning with the VS1400GLH ('87 model) and carrying factory updates through the VS1400GLPK4 ('04 model).
• Documents compression testing, in-frame service access, complete engine removal and installation, cylinder-head and valve-train repair, hydraulic lash-adjuster service, piston, connecting-rod, and crankshaft inspection, clutch and starter-clutch repair, transmission work, and separate front- and rear-cylinder cam-timing procedures.
• Tracks market-specific four-speed and five-speed transmission configurations, then covers secondary and final bevel gear removal, bearing and seal inspection, selective shim setup, backlash and tooth-contact correction, propeller-shaft checks, and final assembly and remounting.
• Explains the front BDS36SS and rear BS36SS carburetor system, two fuel cocks, fuel pump and relay, carburetor disassembly, float and needle-valve inspection, reassembly, balancing, oil-pressure testing, lubrication flow, and emission-control and vapor-hose routing.
• Provides charging and ignition diagnostics, automatic decompression and starter-control testing, starter motor service, instrument and switch checks, complete and model-year wiring diagrams, harness routing, and system-specific electrical test data.
• Covers front and rear wheel and brake repair, fork disassembly and setup, steering-stem and swingarm bearing service, rear suspension, clutch master and release cylinder repair, hydraulic bleeding, troubleshooting charts, factory special tools, torque tables, capacities, wear limits, and clearance specifications.

Model-Year and Market Coverage

The base service information is tied to the VS1400GLH ('87 model). Factory update groups cover GLJ ('88), GLFL/GLPL ('90), GLFM/GLPM ('91), GLFN/GLPN ('92), GLFP/GLPP ('93), GLFR/GLPR/GLFS/GLPS ('94/'95), GLFT/GLPT ('96), GLFV/GLPV ('97), GLFW/GLPW ('98), GLFX/GLPX ('99), GLPY/GLPK1/GLPK2/GLPK3 ('00–'03), and GLPK4 ('04). These year groups are change supplements rather than duplicate standalone manuals; unchanged repair procedures refer back to the core sections.

Several updates are especially important when identifying the correct parts and service data. The '92 section adds ignition-timing boost-sensor inspection. The '93–'96 specifications distinguish market-code four-speed and five-speed transmissions, while the '97 group documents the five-speed constant-mesh arrangement. The '96 material adds regulator/rectifier and ignitor checks; the '00–'03 group includes steering-stem and cable-routing changes; and the K4 section supplies its wiring diagram. A separate pull-back handlebar appendix applies on and after frame No. 101562.

Engine, Fuel, and Shaft-Drive Repair Depth

The main engine chapter goes well beyond tune-up specifications. It identifies assemblies that can be serviced with the engine in the frame, then covers full disassembly and reassembly, cylinder-head and valve-seat work, hydraulic lash adjusters, cam-chain tensioners, color-coded connecting-rod bearing selection, crankshaft bearing and thrust checks, clutch release components, the gearshift mechanism, starter clutch, and final cam timing.

Fuel-system coverage explains how the dual carburetors, electric fuel pump, relay, and two fuel cocks work before moving into removal, inspection, adjustment, reassembly, and carburetor synchronization. The shaft-drive chapter separates secondary and final bevel gear repair and includes bearing-case clearance, selective shims, backlash, tooth-contact inspection, seals, couplings, and propeller-shaft service.

Diagrams, Diagnostics, and Factory Tools

Diagram coverage includes the complete wiring diagram, charging-system circuit, ignition and side-stand interlock schematic, automatic decompression and starter circuit, fuel-pump relay circuit, and secondary/final bevel gear backlash and tooth-contact views. Separate routing pages map the wiring harness, fuel and oil hoses, front and rear brake hoses, clutch hose, throttle cables, choke cable, and synchronizing cable.

Troubleshooting tables address hard starting, low compression, engine noise, clutch drag or slip, shifting faults, shaft-drive noise and leaks, carburetor problems, charging and ignition faults, and brake complaints. The special-tool index identifies the carburetor balancer 09913-13121, lash-adjuster air-bleeding tool 09913-10740, cam-chain tensioner lock 09918-53810, and shaft-drive backlash measuring tool 09924-34510, among other Suzuki tools.

Manual-Specific Repair Notes

Several details are easy to miss without the factory text. Lash adjusters must be air-bled in kerosene; the manual warns that using solvent, fluid, or oil for this operation can cause engine damage. The secondary driven bevel gear is specifically marked not to be disassembled, and any tooth-contact correction must be followed by another backlash check before final assembly. Brake and clutch circuits use glycol-based fluid; mixing silicone- or petroleum-based fluids can seriously damage the hydraulic system.

Engine removal, fuel-system service, fork work, and brake or clutch repair require secure support, fire-safe handling, and close attention to the manual's safety cautions.