Segment:
Competition Motocross / Off-Road Motorcycle
Competitors:
KTM 250 SX, Yamaha YZ250, Honda CR250R, Suzuki RM250, Kawasaki KX250
Vehicle Focus:
Performance-oriented motocross machine with a potent 2-stroke engine
Manual Value Proposition:
Essential resource for owners and technicians to maintain, diagnose, and repair the TC250 to factory standards
Engine:
Detailed overhaul, diagnosis, and repair procedures for the 250cc engine
Transmission:
Clutch, gearbox, and final drive maintenance and repair
Chassis:
Frame, suspension (front and rear), steering, and wheel bearing service
Brakes:
Hydraulic brake system inspection, repair, and fluid replacement
Electrical:
Wiring diagrams, ignition system, lighting, charging system, and troubleshooting
Fuel System:
Carburetor (Mikuni VM34) overhaul, adjustment, and fuel tank service
Cooling System:
Radiator, fan, and coolant system maintenance
Exhaust System:
Muffler and header pipe inspection and replacement
Maintenance:
Scheduled maintenance, oil changes, filter replacements, chain adjustment, and spark plug service
Troubleshooting:
Diagnostic charts and symptom-based troubleshooting for common issues
Repair:
Step-by-step instructions for component disassembly, repair, and reassembly
Disassembly Reassembly:
Comprehensive guides for complete engine and chassis teardown
Depth:
Complete engine rebuild, advanced diagnostics, and detailed component specifications
Type:
2-Stroke, Single Cylinder
Displacement:
249.5 cc (approx.)
Bore X Stroke:
72 mm x 61.5 mm (typical for this era 250cc 2-strokes)
Horsepower:
Estimated 40-45 HP (peak, specific figures vary by tune and year)
Torque:
Estimated 27-30 lb-ft (peak, specific figures vary)
Carburetor:
Mikuni VM34SS
Fuel Type:
Unleaded gasoline with 2-stroke oil pre-mix (typically 40:1 ratio)
System:
CDI (Capacitor Discharge Ignition)
System:
Premix or Autolube (premix is more common for racing models like TC)
Oil Change:
Every 10-15 hours of riding or annually. Check manual for specifics.
Air Filter Cleaning:
After every few rides, or as dictated by conditions. Refer to manual.
Spark Plug Replacement:
Every 20-30 hours of riding. Manual specifies type and gap.
Top End Rebuild:
Typically every 50-100 hours depending on riding style and maintenance. Manual provides guidance.
Engine Oil Type:
Refer to manual for specific 2-stroke pre-mix oil recommendation (e.g., Motul, Castrol)
Coolant Type:
Ethylene glycol-based antifreeze mixed with distilled water (50/50 ratio recommended)
Brake Fluid:
DOT 4 or DOT 5.1 hydraulic brake fluid
Carburetor Tuning:
Can be sensitive to altitude and temperature changes; requires meticulous adjustment.
Clutch Wear:
Regular adjustment and eventual replacement of clutch plates is common with aggressive riding.
Electrical Connections:
Corrosion can occur in off-road environments; regular inspection of connectors is advised.
Suspension Seals:
Fork and shock seals may require periodic replacement due to off-road abuse.
Origin:
Husqvarna Motorcycles, a Swedish brand with a long history in off-road racing, now owned by Italian and later Austrian interests.
Tc Lineage:
The TC series represents Husqvarna's competition motocross line, known for its potent 2-stroke engines.
Manufacturing Location:
Likely Italy during this period, under the Cagiva Group ownership.