Category:
Competition Enduro Motorcycle
Target Audience:
Off-road riders, enduro enthusiasts, racers, mechanics
Competitors:
KTM EXC series, Beta RR series, Yamaha WR series, Honda CRF-X series
Usp:
Powerful 2-stroke engine, high-quality suspension components (Marzocchi/Öhlins), lightweight chassis, Italian design heritage
Engine:
Complete engine disassembly, assembly, tuning, troubleshooting, component identification
Transmission:
Clutch system, gearbox, shift mechanism, lubrication
Fuel System:
Fuel injection system (Mikuni DFI), fuel pump, injectors, fuel tank, lines
Ignition System:
CDI, spark plug, ignition coil, wiring
Cooling System:
Radiator, fan, coolant, thermostat, hoses
Exhaust System:
Exhaust manifold, muffler, catalytic converter (if applicable), lambda sensor
Chassis Frame:
Frame inspection, welding points, steering head bearings
Suspension Front:
Marzocchi 48mm USD forks, internal components, adjustments, seal replacement, oil change
Suspension Rear:
Öhlins rear shock absorber, linkage system, spring preload, damping adjustments, service
Brakes Front:
Brembo hydraulic disc brakes, caliper service, pad replacement, fluid flush, master cylinder
Brakes Rear:
Brembo hydraulic disc brakes, caliper service, pad replacement, fluid flush, master cylinder
Wheels Tires:
Wheel bearing service, spoke tensioning, tire mounting/dismounting, recommended tire pressures
Electrical System:
Wiring diagrams, battery, charging system (stator, regulator/rectifier), lighting, starter motor
Bodywork:
Plastics, seat, fuel tank, fenders, graphics, removal and installation
Controls:
Handlebars, levers, footpegs, shift lever, brake pedal adjustments
Maintenance:
Scheduled maintenance checks, oil changes, filter replacements, chain adjustment, spark plug inspection
Troubleshooting:
Diagnostic procedures for common and uncommon issues, fault code interpretation (if applicable), component testing
Repair:
Step-by-step repair instructions for all major components and systems
Disassembly Assembly:
Complete guides for engine, transmission, suspension, and chassis components
Tuning Adjustment:
Fuel injection mapping (if accessible via software), suspension sag and damping adjustments, idle speed
Special Tools:
Identification and usage of specific tools required for repairs
Depth:
Comprehensive, suitable for professional mechanics and experienced DIY enthusiasts
Type:
2-stroke, single-cylinder
Bore X Stroke:
72 x 60 mm (Typical for this displacement)
Cooling System:
Liquid-cooled
Ignition:
Digital electronic ignition with variable advance (CDI)
Starter:
Electric starter
Horsepower:
Approx. 40-45 HP (Estimate, exact figure varies with tuning and exhaust)
Torque:
Not explicitly stated, but strong mid-range torque characteristic of 250cc 2-strokes
Carburetion:
Mikuni TMX 38mm flat slide carburetor (or Keihin equivalent, common for the era)
Fuel Type:
Unleaded gasoline, 95-98 RON recommended
Premix:
50:1 ratio with a high-quality 2-stroke oil (e.g., Motul 800, Castrol TTS)
Engine Oil Change:
Recommended every 10-15 hours of riding or annually. (Specific interval in manual)
Air Filter Cleaning:
Inspect and clean every 5-10 hours of riding, depending on conditions. (Specific interval in manual)
Spark Plug Inspection:
Inspect every 20-30 hours of riding. Replace as needed. (Specific interval in manual)
Chain Lubrication Adjustment:
Lubricate after every wash or wet ride. Adjust tension every 15-20 hours. (Specific interval in manual)
Suspension Service:
Fork oil change and seal inspection every 30-50 hours of riding. (Specific interval in manual)
Engine Oil:
For the gearbox/clutch: SAE 75W-90 API GL-4 or GL-5 gear oil. For premix: High-quality 2-stroke synthetic oil at 50:1. (Specifics in manual)
Coolant:
Mixture of distilled water and permanent antifreeze (ethylene glycol based), 50/50 ratio. (Specifics in manual)
Brake Fluid:
DOT 4 hydraulic brake fluid. (Specifics in manual)
Common Wear Items:
Clutch plates, piston rings, spark plug, air filter, wheel bearings, chain and sprockets are common wear items for off-road motorcycles.
Potential Concerns:
Overheating if cooling system is neglected, potential clutch wear from aggressive riding, intake air leaks affecting fuel mixture.
