2000–2007 Suzuki DR-Z400 Service & Repair Manual (P/N 99500-43030-01E)

• A 232-page PDF of scanned Suzuki service-manual pages for the 2000 DR-Z400S (DR-Z400SY) dual-sport.
• Engine repair covers removal, crankcase separation, cam-chain timing, and clutch and transmission disassembly and reassembly.
• Mikuni BSR36 carburetor procedures cover overhaul, float-height adjustment, and throttle position sensor testing and adjustment.
• Cooling-system work includes leak testing, thermostat and fan-control checks, and water-pump mechanical-seal replacement.
• Chassis repair sections address front-fork rebuilding, steering bearings, swingarm linkage, and brake caliper and master-cylinder overhaul.
• Electrical fault-finding uses system circuit diagrams, troubleshooting charts, and charging, starter, and CDI ignition tests.

S-Model and Market Coverage

The market codes identify E-02 (UK), E-03 (USA), E-19 (EU), E-28 (Canada), E-33 (California), and E-54 (Israel). This is S-model service information, not an E- or SM-specific manual. Later model-year supplements are not included.

Carburetor identification separates 29FA, 29FB, and 29FC versions: 29FA serves E-02/E-19/E-54, 29FB serves E-03/E-28, and 29FC serves E-33. The regional sections cover PAIR air-supply valve testing and carburetor piston-valve solenoid checks for E-02/E-19/E-54. California coverage addresses the evaporative-emissions canister, fuel-vapor separator, roll-over valve, and associated hoses.

Internal Mechanical and Engine System Scope

This manual outlines component identification and service limits for the cylinder head, piston assembly, crankcase, and transmission gear clusters in the 398 cc liquid-cooled DOHC single-cylinder engine. Inspection data include valve seat cutting angles, camshaft journal tolerances, and piston ring end gaps.

Repair coverage extends to valve-guide replacement, crankshaft and connecting-rod inspection, and balancer-shaft timing. Exploded assembly views and a transmission cross-section show gear, washer, and circlip placement. The five-speed gearbox data include shift-fork clearances and gear ratios. A separate chart distinguishes components removable with the engine installed from work requiring engine removal.

Factory tool references include crankcase separator 09920-13120 and crankshaft installer 09910-32812. The crankshaft installation notes warn that hammering the shaft into the case can disturb its alignment. Starter-clutch checks and a starter torque-limiter slip test are included, but the limiter is treated as a replacement assembly rather than an internal rebuild.

Specification and Data Preview

Maintenance coverage includes drive-chain wear and adjustment, hydraulic brake bleeding, and intake and exhaust valve-clearance inspection. The Tappet Shim Selection Tables support shim sizing. Compression testing accounts for the automatic decompression mechanism; oil-pressure testing includes guidance on abnormal readings.

The Engine Lubrication System Chart traces the dry-sump circuit through the frame oil tank, feed and return pumps, and engine oil passages. Fluid-capacity data distinguish routine oil changes, filter changes, and engine overhaul. Torque data cover engine drain plugs and chassis fasteners, including market-specific rear-axle specifications.

An oil-filter installation caution identifies a specific repair risk: incorrect filter orientation can cause serious engine damage.

Suspension Adjustment and Rear-Shock Limits

Front-fork service includes oil-level setting, spring preload, and compression-damping adjustment. Rear suspension coverage addresses cushion-lever bearings, shock inspection and replacement, and spring-preload and compression-damping settings. Internal rear-shock rebuilding is not covered; the manual treats the shock as nonserviceable.

Before undertaking extensive mechanical work, use proper lifting support and follow the precautions for hot coolant and the nitrogen-charged rear shock.

Electrical Diagnosis and Wiring Scope

Separate charging-system, starter-system, and ignition-system circuit diagrams accompany fault-isolation charts. Tests cover generator output, regulator/rectifier function, starter relay operation, and ignition-coil, pickup-coil, and signal-coil peak voltage. The side-stand/ignition interlock section adds switch and relay checks for starting and running faults.

Starter-motor repair includes brush, commutator, and armature inspection. Electrical test specifications and switch-continuity tables support diagnosis rather than relying solely on component replacement.

This PDF contains system-level schematics, not a complete motorcycle wiring diagram. Section 8 is absent, including the general wire-harness, cable, and hose-routing pages referenced elsewhere in the text.