Target Audience:
Husqvarna WR125 and CR125 owners and independent repair shops specializing in off-road motorcycles.
Value Proposition:
Provides essential technical information to maintain and repair these specific models, saving time and money compared to dealership service.
Completeness:
Covers all major mechanical and electrical systems, offering a complete resource for vehicle upkeep.
Accessibility:
Digital format allows for easy access on multiple devices and quick navigation.
Engine:
Detailed disassembly, assembly, troubleshooting, and specifications for the 125cc 2-stroke engine.
Transmission:
Complete coverage of gearbox, clutch, and shift mechanism maintenance and repair.
Fuel System:
Carburetor tuning, cleaning, and rebuilding; fuel pump and line maintenance.
Cooling System:
Radiator, hoses, thermostat, and coolant maintenance; troubleshooting overheating issues.
Ignition System:
Spark plug specifications, ignition coil testing, CDI unit troubleshooting.
Electrical System:
Wiring diagrams, lighting, battery, charging system diagnostics.
Suspension:
Front fork (USD) and rear shock absorber maintenance, seal replacement, oil levels, and adjustment procedures.
Brakes:
Front and rear brake caliper service, hydraulic system bleeding, pad replacement, rotor inspection.
Wheels And Tires:
Tire pressure recommendations, wheel bearing service, spoke tensioning (if applicable).
Frame And Bodywork:
Frame inspection, plastic body panel removal/installation, seat maintenance.
Exhaust System:
Exhaust pipe and silencer inspection and maintenance.
Routine Maintenance:
Oil changes, filter replacements, chain adjustments, spark plug checks, air filter cleaning.
Troubleshooting:
Diagnostic charts and common problem solutions for various systems.
Engine Rebuild:
Top-end rebuild (piston, rings, cylinder), bottom-end bearing replacement, crankshaft service.
Clutch Service:
Clutch plate replacement, basket inspection, cable adjustment.
Suspension Overhaul:
Complete fork and shock absorber disassembly, cleaning, seal and oil replacement.
Brake System Maintenance:
Hydraulic bleeding, caliper seal replacement, pad and rotor replacement.
Carburetor Rebuild:
Detailed instructions for carburetor disassembly, cleaning, and reassembly with jetting recommendations.
Electrical Diagnostics:
Using wiring diagrams to troubleshoot electrical faults.
Depth:
Comprehensive, covering everything from basic maintenance to complete engine and chassis overhauls.
Diagnostics:
Advanced troubleshooting procedures for mechanical and electrical components.
Specifications:
Includes detailed torque specifications, clearances, fluid levels, and tolerances.
Type:
125cc, 2-stroke, liquid-cooled, single-cylinder
Bore X Stroke:
Typically around 54mm x 54.5mm for this era of 125cc engines (specifics to be confirmed in manual).
Compression Ratio:
Expected to be high for a 2-stroke, likely in the range of 8.5:1 to 10.5:1 (specifics in manual).
Power Output:
Typically in the range of 30-40 HP depending on tuning and model variant (specifics in manual).
Torque:
Specific torque figures will be detailed in the manual.
Ignition Timing:
Detailed ignition timing specifications for optimal performance.
Spark Plug:
Specific spark plug type, heat range, and gap will be listed (e.g., NGK BR10EG).
Max Power Rpm:
RPM at which peak horsepower is achieved (detailed in manual).
Max Torque Rpm:
RPM at which peak torque is achieved (detailed in manual).
Carburetor Type:
Likely a Keihin PWK or similar performance-oriented carburetor (specific model and size in manual).
Carburetor Jetting:
Detailed main jet, pilot jet, needle, and air/fuel screw settings for various conditions.
Fuel Type:
Recommended octane rating for gasoline (e.g., 95 RON / 91 AKI).
Oil Mixture:
Recommended ratio of 2-stroke oil to gasoline (e.g., 40:1, 50:1).
Oil Change:
Recommended intervals for engine oil and transmission oil changes, typically based on riding hours or mileage.
Air Filter Cleaning:
Frequent cleaning recommended, especially in dusty off-road conditions.
Spark Plug Replacement:
Recommended replacement intervals to maintain optimal ignition performance.
Chain Lubrication Adjustment:
Regular checks and adjustments needed for optimal chain life and performance.
Engine Oil:
Type of 2-stroke oil and mixing ratio will be specified (e.g., Motul 800 2T Factory Line).
Transmission Oil:
Specific viscosity and type of gear oil (e.g., Bel-Ray Gear Saver Transmission Oil 80W).
Coolant:
Type of coolant (e.g., ethylene glycol-based, specific mixture ratio) for the liquid-cooled engine.
Brake Fluid:
DOT 4 or DOT 5.1 hydraulic brake fluid specified.
Power Valve Cleaning:
2-stroke power valves can accumulate carbon and require periodic cleaning/servicing for optimal performance.
Clutch Wear:
Clutch plates may wear faster with aggressive riding and require replacement.
Suspension Seals:
Fork and shock seals are prone to wear and leakage, requiring periodic replacement.
