Suzuki VZ800 Marauder / Boulevard M50 2004–2009 Factory Service Manual (P/N 99500-38050-01E)

Prepared by Suzuki Motor Corporation, this factory service manual is P/N 99500-38050-01E, dated December 2004. Its stated application is the Suzuki VZ800K5 (2005 model). This edition should not be treated as blanket 2004–2009 VZ800 coverage.

Searchable Text, Bookmarks, and Wiring Detail

Search and diagram access: The PDF has searchable text and embedded bookmarks for all 12 main sections and numerous subsections. Small component labels and wire-color codes in the full-vehicle wiring diagrams require zooming for comfortable reading.

One printable English PDF contains 454 pages: 445 pages across the technical sections and wiring diagrams, plus 9 cover, introductory, and publication pages already included in that total.

Engine Overhaul, Shaft-Drive Setup, and FI Diagnosis

The following highlights are a selection of the contents. Additional topics include compression-pressure testing and periodic SDS data recording.

• Engine and transmission repair: Step-by-step engine removal, disassembly, and reassembly, with cylinder-head and valve servicing, clutch repair, and internal transmission inspection.

• Secondary and final drive service: Bevel-gear removal, bearing and seal replacement, selective-shim adjustment, backlash measurement, tooth-contact checks, and shaft-drive reassembly.

• FI and fuel-system diagnosis: Dealer-mode and SDS diagnostics, sensor and actuator circuit tests, fuel-pressure checks, pump inspection, injector service, and throttle-body adjustment.

• Cooling and lubrication: Cooling-circuit pressure testing, radiator and thermostat inspection, cooling-fan checks, water-pump seal replacement, and lubrication-system inspection.

• Chassis repair: Wheel and tire service, front-fork disassembly, steering adjustment, rear-suspension work, front caliper and master-cylinder rebuilding, rear-brake service, and brake bleeding.

• Electrical troubleshooting: Charging and ignition tests, starter-motor inspection and reassembly, side-stand/ignition interlock diagnosis, speedometer checks, pilot lamps, relays, switches, and battery service.

• Workshop reference material: Exploded assembly views, routing drawings, troubleshooting charts, special-tool identification, torque tables, fluid specifications, electrical test values, wear limits, and adjustment clearances.

Suzuki wrote this manual for people who already have the knowledge, skills, workshop equipment, and specified special tools needed to service its motorcycles.

Internal Engine Repair and Shaft-Drive Adjustment

The engine chapter extends to camshaft and cam-chain service, tensioners, piston and ring inspection, crankshaft checks, and connecting-rod bearing selection. Clearance tables distinguish standard dimensions from service limits. Oil-pump work covers inspection and assembly replacement rather than internal pump rebuilding.

The shaft-drive procedures connect shim selection with backlash and tooth-contact inspection, allowing the technician to assess both aspects of gear engagement during setup. Servicing the secondary drive bevel gear requires engine removal and crankcase separation.

The secondary drive bevel gear and its bearing are supplied as an assembly, while the final drive and driven gears must be replaced together; attempting to separate the non-serviceable assembly or mixing final-drive gears risks component damage.

FI Diagnostics, Throttle Settings, and Market Differences

The FI chapter includes fail-safe behavior, stored-code reset, ECM terminal identification, and circuit-specific fault tests. These checks help distinguish wiring and connection faults from failed sensors before components are replaced.

Throttle-body coverage includes TPS and STP sensor adjustment, automatic fast-idle operation and setting, and throttle-valve synchronization. SDS procedures cover current and past diagnostic trouble codes, recorded failure conditions, and active-control checks.

Market differences are identified throughout the relevant sections. Heated-oxygen-sensor diagnosis applies to E-02, E-19, and E-24; EVAP inspection is specific to E-33; and catalyst information applies to E-02, E-19, E-24, and E-33. Full-vehicle wiring diagrams are provided separately for E-02/E-19/E-24 and E-03/E-28/E-33.

Front-probing a coupler can spread its female terminals, while incorrect meter connections or connecting ECM couplers with the ignition on can damage the ECM or sensors.

Cooling, Chassis, and Factory Illustrations

Water-pump procedures include mechanical-seal, oil-seal, and bearing inspection and replacement. The chassis chapter covers fork seals, steering bearings and tension adjustment, swingarm and suspension-linkage bearings, and wheel balancing. The fork cartridge and rear shock absorber are not intended for internal disassembly.

Named illustrations include the FI System Wiring Diagram, Cooling Circuit, Engine Lubrication System Chart, PAIR System Diagram, and E-33 EVAP Canister Hose Routing. ECM terminal views and electrical component-location drawings support circuit tracing.

Factory equipment references include SDS Set 09904-41010, mode selection switch 09930-82720, vacuum balancer gauge 09913-13121, and backlash measuring tool 09924-34510. These identify the equipment specified for electronic diagnosis, throttle synchronization, and bevel-gear adjustment.

Fuel-system work involves pressurized gasoline, and brake or internal-engine repair can affect rider safety; follow the manual’s safety precautions and equipment requirements.

A Preview of Engine Clearances and Fuel-Pressure Checks

The crankshaft inspection section specifies 0.05–0.10 mm thrust clearance. Connecting-rod big-end oil clearance is 0.024–0.042 mm standard, with a 0.080 mm service limit, alongside Plastigauge checks and bearing-selection tables.

Fuel-system diagnosis includes an approximately 300 kPa fuel-pressure check with the ignition switched on. The pressure-inspection section relates low and high readings to the fuel filter, regulator, pump, and pump check valve.