Category:
Competition/Motocross
Segment:
125cc Two-Stroke Off-Road Motorcycle
Competitors 2005:
KTM 125 EXC, Yamaha YZ125, Honda CR125R, Suzuki RM125, Kawasaki KX125
Model Focus:
Husqvarna CR (Competition) and WR (Wide Ratio) variants, both based on the 125cc platform.
Manual Value Proposition:
Provides essential, detailed information for maintaining and repairing the 2005 Husqvarna CR WR 125, crucial for performance and longevity.
Engine Mechanical:
Detailed breakdown of engine components, including cylinder, piston, crankshaft, connecting rod, and valve train (where applicable to a 2-stroke).
Engine Performance:
Tuning, carburetion settings, power valve operation, and diagnostic procedures for optimal performance.
Ignition System:
CDI system, ignition timing, stator, and troubleshooting electrical faults related to ignition.
Fuel Delivery:
Carburetor disassembly, cleaning, adjustment, fuel lines, and fuel tank maintenance.
Lubrication System:
Pre-mix specifications, oil injection system (if applicable), and lubrication points.
Cooling System:
Radiator, coolant, water pump (if applicable), and related hoses.
Exhaust System:
Expansion chamber maintenance, silencer, and associated fittings.
Transmission And Clutch:
Gearbox internal components, clutch assembly, operation, and maintenance, including oil specifications.
Suspension Front:
Front fork disassembly, seal replacement, oil levels, damping adjustments, and spring rates.
Suspension Rear:
Monoshock or twin-shock rear suspension system, linkage maintenance, shock absorber servicing, and adjustments.
Braking System:
Hydraulic brake systems (front and rear), caliper service, master cylinder overhaul, brake fluid specifications, and bleeding procedures.
Wheel And Tire:
Wheel bearing maintenance, spoke tension, tire selection, and mounting procedures.
Electrical Components:
Wiring diagrams, lighting system, battery maintenance, switches, and relays.
Frame And Bodywork:
Frame inspection, body panel removal and installation, seat, and plastic components.
Routine Maintenance:
Oil changes, filter replacements, chain adjustment, spark plug checks, and general inspection.
Engine Rebuild:
Detailed instructions for top-end and bottom-end engine rebuilds, including torque specifications.
Carburetor Adjustment:
Step-by-step guide for jetting and tuning the carburetor for various conditions.
Suspension Servicing:
Complete procedures for fork seal replacement and rear shock maintenance.
Brake System Service:
Pad replacement, caliper rebuild, and hydraulic system flushing.
Electrical Troubleshooting:
Diagnostic steps and solutions for common electrical issues using wiring diagrams.
Torque Specifications:
Essential torque values for all critical fasteners across various systems.
Diagnostic Charts:
Flowcharts and symptom-based guides for identifying and resolving problems.
Depth:
Comprehensive: Covers everything from basic owner maintenance to advanced engine rebuilds and system diagnostics.
Detail Level:
OEM Level: Provides factory-level detail for all service and repair procedures.
Type:
Two-Stroke Single Cylinder
Displacement:
124.8 cc (approx.)
Bore X Stroke:
Typically around 54.0 mm x 54.5 mm (specific value may vary, check manual for exact spec)
Reed Valve System:
Yes, likely a case-reed induction system.
Power Valve:
Yes, electronic or mechanical power valve system for improved torque and power across the rev range.
Horsepower Estimated:
Approximately 35-40 HP (actual figures vary based on tuning and specific model variant, consult manual for precise specifications).
Torque Estimated:
N/A (Specific torque figures not readily available, but characteristic of a potent 125cc 2-stroke).
Carburetor Type:
Likely a Keihin PWK carburetor (e.g., 38mm).
Fuel Type:
Unleaded gasoline with appropriate 2-stroke oil mix (e.g., 50:1 or as specified in manual).
Ignition System Type:
Digital CDI (Capacitor Discharge Ignition)
Ignition Timing:
Variable, controlled by CDI unit, refer to manual for specific advance curves.
Oil Change Transmission:
Recommended every 10-15 hours of operation or annually, refer to manual for exact intervals.
Air Filter Cleaning:
Frequent cleaning recommended, typically after every few rides depending on conditions.
Spark Plug Inspection:
Inspect every 5-10 hours of operation, replace as needed.
Top End Rebuild:
Recommended based on usage, typically between 40-80 hours for piston and rings, potentially more for cylinder and crank bearings. Consult manual.
Two Stroke Oil:
High-quality synthetic or semi-synthetic 2-stroke oil, specific viscosity and brand recommendations in manual (e.g., Motul, Castrol).
Transmission Oil:
Specific gear oil grade (e.g., SAE 75W/90, API GL-4 or GL-5) as per manual. Capacity approx. 0.8 - 1.0 liter.
Coolant:
Ethylene glycol based coolant, typically 50% coolant and 50% distilled water.
Brake Fluid:
DOT 4 or DOT 5.1 hydraulic brake fluid (ensure specific type as per manual).
Common Wear Items:
Piston rings, clutch plates, wheel bearings, fork seals, and chain/sprockets are typical wear items on a 125cc 2-stroke.
Carburetion Tuning:
Proper jetting is critical for performance and engine longevity; changes in altitude or temperature may require adjustments.
Power Valve Maintenance:
Carbon buildup on the power valve can affect performance and requires regular cleaning.
