🏷️ Basic Information

Make:

Husqvarna

Model:

WRE 125 SM

Model Variant:

Supermoto (SM)

Engine Displacement Identifier:

125

Chassis Code Range:

Likely specific chassis codes depending on year and regional variations, e.g., for 1998-2000 models.

Engine Code Range:

Likely specific engine codes tied to the 125cc two-stroke engine family used in this period.

👋 Introduction

Vehicle Category:

Lightweight Supermoto (SM) / Enduro (E) variant conversion.

Target Audience:

Enthusiasts seeking to maintain, repair, and optimize their Husqvarna WRE 125 SM.

Competitors Era:

KTM EXC 125, Aprilia RXV 125, Yamaha WR125, Honda CRM125.

Vehicle Focus:

Agile handling, powerful 125cc two-stroke engine for its class, off-road derived platform adapted for street use.

📋 Manual Details

Years Covered:

1998, 1999, 2000

Estimated Page Count:

Hundreds of pages (specific count not provided, but typical for a comprehensive service manual)

Type:

Service Repair Manual

Language:

English (assumed based on product description)

Format:

PDF

📖 Manual Coverage

Engine Mechanical:

Detailed breakdown, assembly, component testing, specifications for the 125cc two-stroke engine.

Engine Fuel System:

Carburetor tuning, fuel pump, fuel lines, fuel tank maintenance.

Engine Ignition System:

Ignition timing, spark plug specifications, CDI unit, stator, coil testing.

Cooling System:

Radiator, hoses, coolant specifications, water pump maintenance.

Exhaust System:

Expansion chamber, silencer maintenance and repair.

Transmission Gearbox:

Gearbox inspection, repair, gear ratios, shifting mechanism.

Clutch System:

Clutch type (likely cable-actuated), clutch plates, springs, operation.

Chassis Frame:

Frame inspection, geometry, general integrity.

Suspension Front:

Upside-down telescopic forks, adjustment, seals, oil, internal components.

Suspension Rear:

Monoshock absorber, linkage system, adjustments, maintenance.

Brakes Front:

Hydraulic disc brake system, caliper, master cylinder, rotor, pad replacement, bleeding procedure.

Brakes Rear:

Hydraulic disc brake system, caliper, master cylinder, rotor, pad replacement, bleeding procedure.

Wheels Tires:

Wheel bearing maintenance, tire replacement, rim specifications, spoke tension (if applicable).

Electrical System:

Wiring diagrams, battery, lighting, horn, switches, fuses.

Bodywork Panels:

Fairings, fenders, seat, fuel tank removal and installation, graphics.

Controls Cables:

Throttle cable, clutch cable, brake lever adjustment, handlebar controls.

Routine Maintenance:

Oil changes, filter replacements, chain adjustment, lubrication points, general inspections.

Engine Rebuild:

Top-end rebuild (piston, rings, cylinder), bottom-end rebuild (crankshaft, bearings).

Troubleshooting:

Diagnostic flowcharts, common problem identification and solutions for various systems.

Component Disassembly Assembly:

Step-by-step instructions for removing, disassembling, inspecting, and reassembling all major components.

Suspension Servicing:

Fork seal replacement, fork oil change, shock absorber service.

Brake System Service:

Brake fluid replacement, caliper overhaul, bleeding procedures.

Carburetor Overhaul:

Complete disassembly, cleaning, jetting, and reassembly of the carburetor.

Electrical Diagnostics:

Testing of electrical components, wiring continuity checks.

Depth:

Comprehensive (covers everything from basic maintenance to full engine and chassis overhauls)

Diagnostic Focus:

Strong emphasis on diagnosis and repair of common issues for the era.

Specifications Detail:

Includes detailed torque values, tolerances, clearances, and fluid capacities.

📊 Manual Specifications

File Type:

PDF

Searchability:

Likely text-searchable PDF (common for quality manuals)

Image Resolution:

Expected high resolution for clear diagrams and illustrations.

Binding:

N/A (digital PDF format)

Paper:

N/A (digital PDF format)

⚙️ Engine Specifications

Engine Type:

Liquid-cooled, two-stroke, single-cylinder

Bore X Stroke:

Likely around 54mm x 54.5mm (typical for this displacement and era of Husqvarna 125cc engines, e.g., CR 125).

Displacement:

123.73 cc (approx.)

Compression Ratio:

Likely in the range of 8.0:1 to 9.5:1, depending on specific tuning.

Reed Valve System:

Likely has a reed valve induction system.

Horsepower Estimated:

Typically 25-30+ HP for street-legal versions of 125cc two-strokes of this era, higher in competition tune.

Torque Estimated:

Estimates around 18-22 Nm (Newton-meters) depending on gearing and peak power RPM.

Carburetor Type:

Likely a high-quality carburetor from Dell'Orto (e.g., PHBH 28/30mm) or Mikuni.

Fuel Type:

Unleaded gasoline (95 RON or higher recommended)

Fuel Mixture:

Requires pre-mix of gasoline and two-stroke oil (typically 50:1 or 32:1 depending on oil quality and usage).

🔧 Transmission

Type:

6-speed constant mesh manual gearbox.

Optional Gear Ratios:

While not strictly optional, different final drive sprockets were common for tuning.

Clutch Type:

Wet multi-plate clutch, hydraulically operated.

Drive Type:

Chain drive.

📐 Dimensions

Wheelbase:

Approximately 1450-1480 mm (typical for this chassis type).

Seat Height:

Approximately 900-930 mm (typical for Supermoto).

Ground Clearance:

Approximately 300-340 mm (typical for a dual-sport/supermoto base).

Dry Weight Estimated:

Around 100-110 kg.

Fuel Capacity:

Approximately 9-11 liters (including reserve).

🛡️ Safety Features

Safety Ratings:

Motorcycles of this era did not have formal crash test ratings like cars.

Braking System:

Dual disc front brakes, single disc rear brake, hydraulic actuation.

Lighting:

Headlight, taillight, brake light, turn signals (depending on homologation).

Frame Construction:

Steel perimeter or trellis frame for rigidity.

Handlebar:

Fat bar handlebars for improved control and impact absorption.

💡 Technology Features

Infotainment System:

N/A (basic motorcycle instrumentation: speedometer, odometer, possibly engine hour meter, warning lights).

Driver Assistance Features:

N/A (no electronic rider aids like ABS or traction control on this model/era).

Connectivity:

N/A (no connectivity features).

🔧 Maintenance

Oil Change Engine:

Transmission oil: every 10-15 hours of use or annually. Pre-mix ratio is critical.

Spark Plug Check:

Check/clean every 5-10 hours, replace every 20-30 hours or as needed based on condition (e.g., NGK BR8EG is common).

Air Filter Cleaning:

Clean after every 5-10 hours of dusty riding, or monthly. Replace as needed.

Chain Lubrication Adjustment:

Lubricate every 500-800 km, adjust chain slack every 1000 km or as needed.

Transmission Oil:

API GL-4 or GL-5 SAE 75W/90 synthetic gear oil (check manual for exact spec).

Coolant:

Ethylene glycol-based antifreeze mixed with distilled water (typically 50/50 ratio).

Brake Fluid:

DOT 4 hydraulic brake fluid.

Fork Oil:

Likely SAE 5W or 10W suspension fluid (specific weight crucial for handling).

Two Stroke Oil:

High-quality, JASO FD or ISO-L-EGD certified full synthetic two-stroke oil.

Two Stroke Top End Wear:

Two-stroke engines are susceptible to piston and ring wear; regular top-end rebuilds are standard maintenance.

Carburetor Tuning Sensitivity:

Carburetor jetting can be sensitive to altitude, temperature, and exhaust modifications.

Electrical Connections:

Corrosion or loose connections in the electrical system can lead to intermittent issues, especially after off-road use.

Suspension Seals:

Fork seals and rear shock seals can wear over time and require replacement.

📚 Vehicle History

Brand Origin:

Swedish origin, known for high-performance off-road motorcycles.

Wre Series:

The WRE (WRE = Wild Cross Racing Enduro) series represented Husqvarna's enduro line, with SM variants being street-legal Supermoto conversions.

125Cc Platform:

Built upon a proven 125cc two-stroke engine platform shared with their motocross and enduro models, adapted for supermoto use with street tires, suspension tuning, and lighting.

Production Period:

Husqvarna motorcycles have a long history, with the 125cc platform seeing continuous development through the 90s and into the early 2000s.

🏆 Awards & Recognition

Motorcycle Reviews:

Husqvarna motorcycles of this period were generally well-regarded for their performance and build quality in their respective classes, often praised for their agile handling and potent two-stroke power delivery.