Model Years Covered:
2000, 2001, 2002, 2003, 2004
Chassis Code General:
Likely related to the CR/WR series chassis platform
Engine Code General:
Likely a variant of the Husqvarna 125cc two-stroke engine
Segment:
Lightweight Supermoto / Motocross Enthusiast Segment
Target Audience:
Owners and technicians focused on maintaining and repairing the Husqvarna SM 125 S for performance riding and off-road use.
Comparable Models:
Yamaha YZ 125, KTM 125 EXC/SX, Suzuki RM 125, Kawasaki KX 125 (in their respective supermoto-converted or relevant off-road guises)
Versatility:
Designed for both street-legal supermoto riding and capable of off-road excursions, characteristic of Husqvarna's heritage.
Comprehensiveness:
Offers extensive detail for both basic upkeep and in-depth mechanical overhauls, making it a valuable resource for DIY enthusiasts and professional mechanics.
Organization:
Features a 'Superb Table of Contents' for efficient navigation and information retrieval.
Coverage Scope:
Comprehensive repair, maintenance, rebuilding, refurbishment, and restoration
Estimated Page Count:
Hundreds of pages (specific count not provided but implied by 'Hundreds of Pages')
Manual Type:
Service Repair Manual
Language:
English (presumed based on typical market for such manuals)
Engine Systems:
Top-end overhaul, bottom-end rebuild, carburetor tuning and maintenance, cooling system, lubrication, ignition system, exhaust system
Transmission Systems:
Clutch operation and replacement, gearbox disassembly and reassembly, shifting mechanism, gear oil specifications
Chassis Systems:
Frame inspection and repair, suspension (front forks, rear shock), steering system, wheel bearings, swingarm maintenance
Braking Systems:
Front and rear brake caliper maintenance and rebuild, brake pad replacement, brake fluid specifications and bleeding procedures, master cylinder service
Electrical Systems:
Wiring diagrams, lighting system, ignition coil, battery maintenance, starter system (if applicable), fuse box layout and identification
Fuel System:
Fuel tank inspection, fuel line maintenance, fuel filter replacement, carburetor component identification and function
Routine Maintenance:
Oil changes, filter replacements, chain adjustment and lubrication, spark plug service, air filter cleaning/replacement
Repair Procedures:
Engine top-end rebuild (piston, rings, cylinder), clutch plate replacement, suspension seal replacement, brake caliper overhaul
Troubleshooting:
Diagnostic charts for common starting issues, running problems, electrical faults, and performance anomalies
Rebuilding Refurbishment:
Detailed steps for complete engine teardown and rebuild, chassis component refurbishment
Depth Of Information:
Highly detailed, covering factory specifications, torque values, clearances, and assembly sequences for complete mechanical overhauls.
PDF Quality:
High-resolution scans of original factory documentation, ensuring clarity of text and diagrams.
Searchable Text:
Likely searchable PDF content, enabling quick access to specific topics.
Printability:
Optimized for printing, with clear layouts and legible diagrams.
Binding:
N/A (PDF format)
Paper Quality:
N/A (PDF format)
Engine Type:
Liquid-cooled, two-stroke, single-cylinder
Bore X Stroke:
54.0 mm x 54.5 mm (Typical for this engine family, requires manual confirmation)
Compression Ratio:
Approx. 8.8:1 to 9.5:1 (Varies with specific tuning, requires manual confirmation)
Valve Train:
Reed valve induction
Cooling System:
Liquid-cooled
Horsepower Approx:
Approx. 30-35 HP (Varies by market restrictions and tuning, requires manual confirmation)
Torque Approx:
Approx. 20-23 Nm (Requires manual confirmation)
Carburetor Model Typical:
Dell'Orto PHBH 28 or similar
Fuel Type:
Unleaded gasoline, minimum 95 octane recommended
Fuel Mixture:
Pre-mix oil/gasoline ratio as specified by manufacturer (typically 1:40 or 1:50)
Transmission Type:
6-speed manual transmission
Transmission Options:
N/A (Typically single transmission option for this model)
Clutch Type:
Wet, multi-plate clutch
Gear Ratios:
Specific gear ratios detailed within the manual (e.g., 1st: 12/32, 2nd: 15/27, 3rd: 17/25, 4th: 19/24, 5th: 21/23, 6th: 22/22)
Final Drive:
Chain drive, typical ratio 14/48 or similar
Overall Length:
Specific dimensions provided in manual
Overall Width:
Specific dimensions provided in manual
Seat Height:
Approx. 900-920 mm (Typical for supermoto 125s, requires manual confirmation)
Dry Weight:
Approx. 95-105 kg (Specific weight details in manual)
Fuel Tank Capacity:
Approx. 7-9 Liters (Specific capacity in manual)
Safety Ratings:
N/A (Motorcycle safety ratings are typically manufacturer-specific and not standardized like cars)
Braking System Type:
Hydraulic disc brakes, front and rear
Suspension Features:
Inverted telescopic front forks, adjustable rear monoshock suspension.
Lighting:
Headlight, taillight, turn signals (street legal configuration)
Oil Change Interval:
Every 3000-5000 km or annually (Refer to manual for exact interval for engine oil/gear oil).
Spark Plug Service:
Every 5000-7000 km or as per manual recommendation.
Air Filter Cleaning:
Every 1000-2000 km, or more frequently in dusty conditions.
Chain Lubrication:
Every 500-750 km, and after washing or riding in rain.
Engine Oil Type:
2-stroke specific pre-mix oil (e.g., Motul 7100 2T, Castrol Power 1 Racing 2T) or separate injection oil (refer to manual for specific grades)
Gearbox Oil Type:
SAE 75W/90 or SAE 80W/90 API GL-4 transmission oil (Specific viscosity and API rating in manual).
Brake Fluid Type:
DOT 4 or DOT 5.1 (Refer to manual for precise specification).
Coolant Type:
Ethylene glycol-based coolant with corrosion inhibitors (e.g., Motul Motocool Expert, Castrol Radicool)
Common Wear Items:
Clutch plates, piston rings, spark plugs, wheel bearings, chain and sprockets, fork seals due to high-performance nature.
Carburetor Tuning Sensitivity:
Two-stroke engines, especially with carburetors, can be sensitive to altitude, temperature, and fuel quality changes, requiring regular jetting adjustments.
Manufacturer History:
Husqvarna Motorcycles, a Swedish brand with a long history in off-road and motocross racing, known for robust and performance-oriented motorcycles.
Sm Series Evolution:
The SM 125 S represents Husqvarna's entry into the lightweight supermoto class, building on their motocross platform (CR series) with road-biased suspension and tires.
Manufacturing Location:
Historically manufactured in Sweden or Italy (depending on the era of Husqvarna ownership and production facilities)
