Category:
Performance off-road/supermoto motorcycle
Target Audience:
Enthusiasts, mechanics, owners seeking to maintain, repair, or restore their 1998 Husqvarna WRE 125 SM.
Competitors Era:
Other 125cc off-road/enduro motorcycles from brands like KTM (e.g., EXC 125), Yamaha (e.g., YZ125), Honda (e.g., CR125), Suzuki (e.g., RM125), Kawasaki (e.g., KX125).
Engine Type:
Two-stroke, single-cylinder, liquid-cooled (typical for this era and model lineage).
Suspension Type:
Performance-oriented USD (Upside Down) front forks and monoshock rear suspension, often with adjustable damping.
Value Proposition:
Provides comprehensive, professional-level technical guidance for all repair and maintenance needs, mirroring information used by trained technicians.
Accessibility:
Instant PDF download eliminates shipping costs and wait times, making crucial information immediately available.
Primary Coverage:
Full service, repair, maintenance, diagnostics, restoration
Secondary Coverage:
Wiring diagrams, troubleshooting, technical specifications
Estimated Page Count:
Variable based on specific edition, but typically 300-600+ pages for a full service manual covering all aspects.
Type:
Full Service Repair Manual
Delivery Method:
Instant Download
Compatibility:
All Windows and Mac versions
Printability:
Full Printable
Software Requirements:
Adobe PDF Reader, WinRAR
Engine:
Complete engine overhaul, top-end rebuild (cylinder, piston, rings), bottom-end rebuild (crankshaft, connecting rod, bearings), valve timing, carburetor tuning, cooling system (if applicable for the specific variant), exhaust system.
Transmission:
Gearbox overhaul, clutch service and replacement, shift mechanism, gear ratios, lubrication specifications.
Chassis:
Frame inspection and repair, swingarm service, linkage maintenance, wheel bearings, steering head bearings.
Suspension:
Front fork service (seals, oil, springs, damping adjustments), rear shock absorber service and adjustments, linkage maintenance.
Brakes:
Front and rear brake system overhaul (calipers, master cylinders, brake lines, pads, rotors), bleeding procedures, fluid specifications.
Electrical:
Ignition system (CDI, coil, spark plug), lighting system, charging system (if applicable), wiring diagrams, troubleshooting electrical faults, starter system (if electric start), battery maintenance.
Fuel System:
Fuel tank, fuel lines, fuel petcock, carburetor (main jet, pilot jet, needle, float adjustment, idle speed), fuel filter.
Cooling System:
Radiator, hoses, water pump (if liquid-cooled), coolant specifications and capacity (if applicable for the specific variant).
Bodywork:
Fairings, seat, fenders, graphics, fuel tank cover, plastics repair and fitting.
Maintenance:
Regular service checks, lubrication points, air filter cleaning/replacement, spark plug replacement, chain adjustment and lubrication, tire pressure checks.
Troubleshooting:
Systematic diagnostic procedures for common and uncommon issues, symptom-based troubleshooting, electrical fault finding.
Repair:
Step-by-step instructions for component removal, repair, and reinstallation for all major vehicle systems.
Rebuild:
Comprehensive guidance for complete engine and gearbox rebuilds.
Restoration:
Detailed information useful for refurbishing and restoring the vehicle to its original condition.
Diagnostics:
Diagnostic routines for engine performance, electrical systems, and mechanical components.
Depth:
Expert-level technical detail suitable for professional technicians and advanced DIY mechanics. Covers everything from basic maintenance to complete engine and component overhauls.
Instructional Style:
Numbered step-by-step instructions with detailed illustrations, drawings, photos, and enlarged inset views for clarity.
Configuration:
Single-cylinder, two-stroke
Displacement:
124.9 cc (approximate, based on typical 125cc two-stroke configurations of the era)
Cooling System:
Liquid-cooled (common for performance 125cc two-strokes)
Bore X Stroke:
Typically around 54 mm x 54.5 mm (specifics would be in the manual)
Horsepower Est:
Approx. 30-35 HP (at crank, typical for this class and era performance tuning)
Torque Est:
Approx. 18-20 Nm (at crank, typical)
Carburetor Type:
Dell'Orto VHSH 30 or similar 30mm carburetor (common for Husqvarna 125cc models)
Fuel Type:
Unleaded gasoline with 2-stroke oil mixture (pre-mix or oil injection system, details in manual)
Ignition System:
CDI (Capacitor Discharge Ignition)
Piston Type:
Two-ring, typically forged or high-silicon aluminum alloy
Reed Valve System:
Yes, multi-petal reed block for improved intake efficiency
Oil Change Engine:
Regularly, as per 2-stroke pre-mix or oil injection system recommendations. Gearbox oil changes typically every 10-20 hours of use or annually.
Spark Plug Replacement:
Intervals vary based on usage and plug type, but typically every 20-50 hours of riding for performance plugs.
Air Filter Cleaning:
Frequent cleaning is crucial for a 2-stroke, especially in dusty conditions (every few rides or as needed).
Top End Rebuild:
Recommended every 50-100 hours of aggressive riding for optimal performance and reliability.
Engine Oil Mixture:
High-quality 2-stroke synthetic or semi-synthetic oil, mixed at the ratio specified by Husqvarna (often 40:1 or 50:1, refer to manual).
Gearbox Oil:
Specific grade and type (e.g., Motul Transoil 10W-40 or equivalent) as per manual.
Coolant:
Ethylene glycol based antifreeze mixed with distilled water (typically 50/50 ratio) if liquid-cooled.
Brake Fluid:
DOT 4 or DOT 5.1 hydraulic brake fluid (confirm specific type in manual).
Common Wear Items:
Piston rings, clutch plates, wheel bearings, steering head bearings, fork seals, chain and sprockets.
Carburetor Tuning:
Can be sensitive to altitude, temperature, and jetting changes; proper tuning is key for performance.
Cooling System Maintenance:
Regular flushing and checking of coolant levels and hoses is important to prevent overheating.
