Market Position:
Performance-oriented motocross bike within the competitive European off-road market
Competitors:
KTM EXC series, Yamaha YZ-F series, Honda CRF series, Suzuki RM-Z series, Kawasaki KX-F series
Key Features Vehicle:
Powerful 4-stroke engine, high-quality suspension components, robust chassis, focus on track performance
Key Features Manual:
Authoritative repair data, detailed diagrams, troubleshooting flowcharts, torque specifications, electrical schematics
Engine Mechanical:
Engine overhaul, cylinder head, piston, crankshaft, valve timing, lubrication system
Fuel System:
Carburetor (Mikuni VM34/VM38), fuel pump, fuel lines, fuel tank maintenance
Ignition System:
Ignition coil, CDI unit, spark plug, timing checks
Cooling System:
Radiator, coolant hoses, water pump, thermostat operation
Transmission Drivetrain:
Clutch operation, gear shifting mechanism, chain drive maintenance, gearbox disassembly/assembly
Suspension Front:
Upside-down (USD) forks, fork oil changes, seal replacement, damping adjustments
Brakes Front:
Hydraulic disc brakes, caliper service, brake pad replacement, bleeding procedure, master cylinder overhaul
Electrical System:
Wiring diagrams, battery maintenance, lighting circuits, starter motor, troubleshooting electrical faults
Chassis Frame:
Frame inspection, steering head bearing service, swingarm maintenance
Bodywork:
Fairings, seat removal, fender installation/removal
Suspension Rear:
Monoshock rear suspension, linkage maintenance, shock absorber service, spring preload adjustment
Brakes Rear:
Hydraulic disc brakes, caliper service, brake pad replacement, bleeding procedure, master cylinder overhaul
Preventative Maintenance:
Regular service checks, lubrication points, chain adjustment, filter cleaning/replacement
Troubleshooting:
Diagnosing common problems, symptom-based troubleshooting guides
Repair Overhaul:
Step-by-step instructions for component disassembly, inspection, repair, and reassembly
Diagnostics:
Checking engine compression, electrical system testing, suspension performance evaluation
Depth:
Comprehensive, suitable for professional mechanics and skilled DIY enthusiasts; covers full engine rebuilds and complex system diagnostics
Engine Type:
Single-cylinder, 4-stroke, liquid-cooled, DOHC
Displacement:
Approximately 249.5 cc (exact for specific year may vary slightly)
Bore X Stroke:
76 mm x 55 mm (typical for this era LC4 250)
Compression Ratio:
12.0:1 (estimated)
Horsepower:
Approx. 35-40 HP at the crank (estimated)
Torque:
Approx. 25-28 Nm at the crank (estimated)
Carburetor Model:
Mikuni VM34 or VM38 (specific model may vary by market/spec)
Fuel Type:
Unleaded gasoline, minimum 95 RON (Research Octane Number)
Oil Type:
High-performance 4-stroke motorcycle oil, JASO MA certified, SAE 10W-40 or 15W-50 depending on climate
Oil Capacity:
Approx. 1.0 - 1.2 liters (including filter)
Transmission Type:
6-speed constant mesh
Clutch Type:
Wet multi-plate, hydraulic actuation
Final Drive:
O-ring sealed chain, 520 pitch
Gear Ratios:
Specific ratios detailed in manual; crucial for performance tuning
Transmission Oil:
Dedicated transmission oil or SAE 80W gear oil (refer to manual for specific fill)
Safety Ratings:
Not applicable (motorcycle safety is assessed through design and rider skill, not formal crash ratings like cars)
Active Safety:
Powerful braking system, responsive chassis, knobby tires for grip
Passive Safety:
Sturdy frame construction, protective bodywork (limited), rider protective gear is essential
Oil Change Interval:
Every 10-15 hours of riding or annually, whichever comes first
Air Filter Cleaning:
Every 5-10 hours of riding, depending on dust conditions
Chain Lubrication Adjustment:
Every 5-10 hours of riding, or as needed
Valve Clearance Check:
Every 20-30 hours of riding
Fork Oil Type:
High-quality fork oil, SAE 5W or 7.5W (specific viscosity and quantity in manual)
Brake Fluid:
DOT 4 or DOT 5.1 hydraulic brake fluid
Common Issues:
Potential for carburetor jetting sensitivity, wear on clutch plates with aggressive use, fork seal leaks if maintenance is neglected, general wear and tear on a performance off-road machine.
Technical Specifications General
Spark Plug Type:
NGK CR9EB (example, verify in manual)
Tire Pressure Front:
18-20 PSI (typically for off-road use)
Tire Pressure Rear:
16-18 PSI (typically for off-road use)
Valve Clearances Intake:
0.05-0.10 mm (example, verify in manual)
Valve Clearances Exhaust:
0.08-0.13 mm (example, verify in manual)
Brand Heritage:
Husqvarna Motorcycles, founded in Sweden in 1903, has a long and storied history in off-road racing and manufacturing
Tc250 Evolution:
The TC series represents Husqvarna's commitment to motocross racing. The 2007-2008 models build upon previous LC4 platform innovations, incorporating race-proven components and chassis designs of the era.
Production Era:
Early to mid-2000s saw significant development and market presence for Husqvarna in the off-road segment, including the TC250.
