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

Suzuki Motor Corporation service manual P/N 99500-39156-03E, 16th edition, April 2004, with a 1990 copyright notice. It covers the VS1400 Intruder through core VS1400GLH ('87) service information, a modification appendix and factory updates through VS1400GLPK4 ('04), organized into 21 numbered groups.

PDF Bookmarks and Wiring Diagram Detail

Text search and diagram detail: The repair text does not support PDF text search. Embedded bookmarks provide access to the core chapters and model-update sections. Small labels in the main and K4 wiring diagrams require zooming.

ZIP download containing one printable, English-language 467-page PDF: 282 pages of core service information, 175 pages of model updates, a four-page modification appendix, four opening pages and two closing pages. All are included in the total.

V-Twin Repair, Shaft-Drive Setup and Electrical Testing

These selected coverage highlights outline the main workshop content. Other subjects include air-cleaner servicing and battery maintenance.

• Engine repair: Compression testing, engine removal and installation, cylinder-head and valve-train repair, hydraulic lash-adjuster service, internal inspection and cylinder-specific cam timing.

• Clutch and transmission: Clutch plates and release components, starter-clutch repair, gearshift mechanisms, internal transmission assembly and model- and market-specific gearbox data.

• Shaft drive: Secondary and final bevel gear removal, bearing and seal inspection, selective shims, backlash, tooth-contact correction and propeller-shaft service.

• Fuel system: Dual-carburetor disassembly, float and needle-valve inspection, reassembly and synchronization, plus fuel-cock, fuel-pump and relay testing.

• Lubrication and cooling: Oil-pressure testing, oil-cooler and hose removal, lubrication and cooling flow charts, and related service specifications.

• Electrical diagnosis: Charging and ignition tests, automatic decompression and starter-control checks, starter-motor repair, instrument and switch inspection, and wiring diagrams.

• Brakes and chassis: Wheel bearings, brake calipers and master cylinders, fork repair, steering-stem and swingarm bearings, rear suspension inspection, and brake and clutch bleeding.

Suzuki wrote this manual primarily for experienced mechanics; apprentice and do-it-yourself mechanics also need the specified measuring equipment and special tools for the work described.

Model Updates and Frame-Specific Changes

The core chapters provide the repair procedures, while subsequent groups document changes and refer back to earlier sections for unchanged work.

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).

Variant selection: Market-coded transmission tables distinguish the applicable gear configurations before parts or service data are selected. The GLFN/GLPN group adds ignition-timing boost-sensor tests; GLFT/GLPT includes revised regulator/rectifier and ignitor checks; GLFV/GLPV supplies a revised transmission assembly view.

The appendix distinguishes pull-back handlebar changes, revised fuel hoses and successive hose-routing layouts by frame number, allowing the earlier and later arrangements to be identified before service.

Internal Engine Work and Cam Timing

The engine chapter separates work possible with the engine in the frame from complete engine removal. Step-by-step disassembly and reassembly extend to valve guides and seats, cam-chain tensioners, pistons, connecting rods, crankshaft bearings and thrust shims.

Bearing-selection tables match connecting-rod and crankpin codes to bearing colors. Separate front- and rear-cylinder timing instructions identify the corresponding camshaft markings and installation positions.

Lash-adjuster caution: The manual specifies kerosene for air bleeding and warns that substituting other fluids during this operation can damage the engine.

Carburetor Balancing and Oil-System Diagnosis

Front and rear carburetors have separate component drawings, jet specifications and float settings. Balancing procedures distinguish synchronizing-cable replacement, throttle-cable replacement and carburetor removal, with balancer calibration included.

Emission-control information identifies close-tolerance carburetor components and shows vapor-hose routing. Fuel-pump and relay tests address delivery faults, while oil-pressure diagnosis relates abnormal readings to filters, passages, seals and pump condition.

The oil-pump section covers removal and replacement as a unit; it warns that attempting internal overhaul can damage the locked case screws.

Secondary and Final Bevel Gear Adjustment

Shim tables cover bearing-case clearance, backlash and tooth-contact patterns. Contact correction can alter backlash, so the manual links both checks to final assembly.

The shaft-drive chapter also addresses seals, couplings, propeller-shaft splines and universal-joint condition. The secondary driven gear assembly is specifically excluded from internal disassembly.

Circuit Diagrams, Fault Tables and Factory Tools

System drawings include the charging circuit, ignition and side-stand interlock schematic, automatic decompression/starter circuit, and fuel-pump relay circuit. Complete wiring layouts and model-specific updates include a K4 diagram.

Routing drawings map the harness, fuel and oil lines, brake and clutch hoses, and throttle, choke and synchronizing cables. The GLPY–GLPK3 material also illustrates revised steering-stem and handlebar-holder construction.

Troubleshooting tables address starting and compression complaints, engine noise, clutch drag or slip, shifting faults, shaft-drive noise and leaks, carburetor operation, charging, ignition and brakes. Reference sections provide torque tables, capacities, wear limits and clearance data.

Suzuki tool references include carburetor balancer 09913-13121, lash-adjuster air-bleeding tool 09913-10740, cam-chain tensioner lock 09918-53810 and backlash measuring tool 09924-34510.

Hydraulic-system caution: Silicone- or petroleum-based fluid can damage the glycol-fluid brake and clutch systems. Engine removal, fuel-system service, fork work, and brake or clutch repairs require secure support and the manual’s precautions for fuel handling and hydraulic service.

A Preview of Compression and Bearing Inspection Data

For the core VS1400GL engine, the compression-check section lists a standard range of 1,000–1,400 kPa with the engine warm and a service limit of 800 kPa.

Connecting-rod big-end bearing selection uses a standard oil clearance of 0.024–0.042 mm and a service limit of 0.080 mm, alongside the color-coded bearing-selection table.