Segment:
Competition Enduro (WR) and Motocross (CR) motorcycles
Target Audience:
Owners, amateur racers, mechanics seeking to maintain and repair their Husqvarna WR 125 or CR 125 models.
Competitors:
KTM 125 EXC/SX, Yamaha YZ125, Honda CR125R, Suzuki RM125, Kawasaki KX125.
Manual Value Proposition:
Provides professional-level repair and maintenance information, enabling cost savings on service and empowering owners with in-depth knowledge.
Digital Advantage:
Instant download, searchable content, and the ability to print specific sections reduces the need for physical manuals and their associated wear and tear.
Engine:
Complete engine disassembly, assembly, inspection, tuning, carburetor settings, cooling system, lubrication.
Transmission:
Gearbox overhaul, clutch assembly, shift mechanism, gear ratios, maintenance.
Suspension:
Front forks (WP or Marzocchi commonly), rear shock absorber (WP or Ohlins), linkage systems, oil levels, seal replacement, valving.
Brakes:
Hydraulic brake systems (front and rear), caliper service, master cylinder overhaul, brake pad replacement, fluid specifications, bleeding procedures.
Electrical:
Ignition system, lighting, wiring diagrams, battery, starter (if applicable), troubleshooting electrical faults.
Fuel System:
Fuel tank, fuel lines, fuel filter, carburetor maintenance and tuning (e.g., Keihin PWK, Mikuni TM).
Cooling System:
Radiators, coolant hoses, coolant type and capacity, bleeding the system.
Exhaust System:
Exhaust pipe, silencer, packing replacement, common issues.
Frame And Bodywork:
Frame inspection, body panel removal and installation, seat, fuel tank mounting.
Routine Maintenance:
Oil changes, air filter cleaning/replacement, chain lubrication and adjustment, spark plug replacement, general inspection.
Troubleshooting:
Diagnostic charts for common problems, electrical system troubleshooting, engine performance issues.
Engine Rebuild:
Piston and ring replacement, cylinder honing, crankshaft and bearing service, gasket replacement, torque specifications.
Transmission Overhaul:
Complete gearbox disassembly and reassembly, bearing replacement, seal installation.
Suspension Service:
Fork seal replacement, fork oil change, rear shock servicing, spring adjustments.
Brake System Repair:
Caliper rebuild, master cylinder replacement, brake line bleeding, rotor inspection.
Carburetor Tuning And Rebuild:
Jetting adjustments, needle settings, float bowl height, idle speed, pilot and main jet selection based on conditions.
Electrical Diagnostics:
Fault finding for ignition, lighting, and charging systems using wiring diagrams.
Wheel And Tire Service:
Spoke tensioning, rim maintenance, tire fitting and balancing.
Depth:
Comprehensive. Covers everything from basic preventative maintenance to full engine and gearbox rebuilds, including detailed diagnostic procedures.
Level Of Detail:
Professional technician level, with detailed step-by-step instructions, torque specifications, measurements, and diagrams.
Configuration:
Liquid-cooled, 2-stroke, single-cylinder
Displacement:
Approximately 123-125cc (specific bore and stroke will be detailed in the manual)
Bore X Stroke:
Specific dimensions will be provided in the manual, typically around 54mm x 54.5mm or similar for a 125cc class.
Cooling System:
Liquid-cooled
Horsepower Range:
Likely in the 30-40 HP range, depending on the specific CR or WR configuration and tuning.
Torque Range:
Specific figures will be in the manual, but typical for a 125cc two-stroke.
Carburetor Type:
Likely Keihin PWK or Mikuni TM series (e.g., PWK 38, TM 38) depending on model and region.
Fuel Type:
Unleaded gasoline with appropriate two-stroke oil premix (ratio specified in manual).
Reed Valve System:
Advanced reed valve intake system for enhanced performance.
Oil Change Frequency:
Regularly recommended based on operating hours or mileage (e.g., every 10-15 hours of aggressive riding, or as specified).
Air Filter Cleaning:
Frequent cleaning recommended, especially in dusty conditions (e.g., after every few rides or daily depending on the environment).
Chain And Sprocket Maintenance:
Lubricate and clean chain regularly, check for wear and proper tension before each ride.
Top End Rebuild:
Intervals vary greatly with use, but a piston/ring replacement might be considered every 50-100 hours of hard use. The manual will provide specific guidance.
Engine Oil:
Two-stroke premix oil (e.g., Motul, Castrol) with specific API TC or JASO FD rating recommended by Husqvarna. Ratio specified in manual.
Transmission Oil:
Hypoid gear oil (e.g., SAE 80W/90) as per manual specifications. Capacity will be detailed.
Coolant:
Ethylene glycol-based antifreeze mixture with corrosion inhibitors, typically a 50/50 mix with distilled water.
Fork Oil:
Specific suspension fluid viscosity (e.g., WP Suspension Fluid, Maxima Fork Oil) and quantity per fork leg will be provided. Common viscosities are 5W, 7.5W, 10W.
Brake Fluid:
DOT 4 hydraulic brake fluid.
Carburetor Jetting:
Can be sensitive to altitude and temperature changes; proper jetting is critical for optimal performance and engine longevity.
Clutch Wear:
Clutch plates can wear depending on riding style; regular inspection and adjustment are important.
Suspension Seals:
Fork seal leaks are a common maintenance item on off-road motorcycles; regular cleaning and proper installation of new seals are key.
Cylinder Wear:
Due to the high-performance nature of two-stroke engines, cylinder and piston wear are expected over time and require periodic inspection/rebuilding.
Brand Origins:
Husqvarna Motorcycles is a Swedish brand with a long history dating back to 1903, known for its off-road prowess.
Two Stroke Era:
The 125cc two-stroke platform was a cornerstone for Husqvarna in both motocross (CR) and enduro (WR) racing and recreational riding.
Key Innovations Early 2000S:
Models from this era benefited from advancements in engine porting, suspension technology (often WP or Marzocchi components), and chassis design.
Manufacturing Location:
Historically manufactured in Sweden and later Italy, depending on the ownership period.
