Segment:
Dual-purpose motorcycle, adventure touring, dual-sport.
Competitors:
Yamaha XT600, Honda XL600V Transalp, BMW R80GS, Suzuki DR600.
Features:
Versatile platform for on-road and off-road use, robust single-cylinder engine, electric start (R-E variant), capable suspension, often favored for touring and exploration.
Engine:
Complete engine overhaul, top-end and bottom-end components, cylinder head, pistons, crankshaft, camshaft, timing, lubrication system, cooling system.
Fuel System:
Carburetor(s) servicing and adjustment (Mikuni VM series likely), fuel pump, fuel lines, fuel tank maintenance.
Transmission:
Gearbox disassembly and assembly, gear selection, clutch operation and adjustment, gearbox oil specifications and replacement.
Electrical System:
Ignition system (CDI, spark plugs), lighting system (headlight, taillight, indicators), battery, charging system (alternator, rectifier/regulator), starter motor, wiring diagrams.
Chassis And Suspension:
Front fork (telescopic, likely Marzocchi or similar) overhaul, rear suspension (monoshock or twin shock, depending on exact T4 variant) servicing, swingarm, linkages, bearings.
Brakes:
Front and rear brake system servicing, hydraulic components (master cylinder, calipers, brake lines), disc and pad replacement, brake fluid specifications.
Wheels And Tires:
Wheel bearing maintenance, spoke tensioning (if applicable), tire pressure recommendations, tire size specifications.
Bodywork And Frame:
Frame inspection, body panel removal and installation, seat, fuel tank, fenders, fairings (if any).
Maintenance:
Routine maintenance checks, oil changes, filter replacements, chain adjustment and lubrication, brake bleeding, spark plug replacement, air filter cleaning/replacement.
Troubleshooting:
Diagnostic charts for common problems related to starting, running, electrical issues, and performance. Symptom-based troubleshooting guides.
Repair:
Step-by-step instructions for disassembling, repairing, and reassembling all major vehicle components and systems.
Specifications Data:
Torque specifications for critical fasteners, engine tuning data, electrical component resistances, fluid capacities, wear limits.
Depth:
Comprehensive, suitable for both DIY enthusiasts and professional technicians. Covers detailed rebuild procedures and diagnostic strategies.
Engine Type:
Four-stroke, single-cylinder, SOHC, 2-valve (typical for this era and displacement).
Displacement:
Approx. 478cc (exact displacement may vary slightly depending on specific T4 variant).
Bore X Stroke:
Likely around 84mm x 87mm (typical for a 500cc class single).
Cooling System:
Air-cooled.
Horsepower:
Estimated 30-35 HP at 6500-7000 RPM (subject to confirmation via manual data).
Torque:
Estimated 35-40 Nm at 5000-5500 RPM (subject to confirmation via manual data).
Carburetion:
Single Mikuni VM34 or similar (common for this model).
Fuel Type:
Unleaded gasoline, Octane rating 91 (RON+MON)/2 or higher.
Oil Type:
API SF or SG classification, SAE 20W-40 or 10W-40 motorcycle oil.
Oil Capacity:
Approx. 1.8 - 2.0 liters with filter change (exact figure in manual).
Length:
Approx. 2200 mm (typical for this class).
Width:
Approx. 800 mm (typical).
Height:
Approx. 1300 mm (to top of handlebars, typical).
Wheelbase:
Approx. 1450 mm.
Dry Weight:
Approx. 150-160 kg (exact figure in manual).
Gross Vehicle Weight Rating:
Approx. 330 kg.
Fuel Tank Capacity:
Approx. 17 liters.
Crash Test Ratings:
Not applicable for motorcycles of this era.
Braking System:
Hydraulic disc front, drum or disc rear (depending on variant).
Lighting:
Halogen headlight, taillight, brake light, turn signals.
Frame Construction:
Steel double cradle frame.
Oil Change:
Every 3,000 - 5,000 km or 6-12 months (refer to manual for exact recommendation).
Spark Plug Replacement:
Every 10,000 - 15,000 km.
Air Filter Cleaning:
Every 5,000 km or as needed based on conditions.
Valve Clearance Check:
Every 10,000 - 15,000 km (critical for performance and longevity).
Engine Oil Grade:
SAE 20W-40 or 10W-40 (API SF/SG).
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid (check manual for specific recommendation).
Coolant Type:
Not applicable (Air-cooled).
Common Wear Items:
Clutch plates, wheel bearings, steering head bearings, fork seals, carburetor diaphragms, exhaust system integrity.
Electrical Concerns:
Wiring harness durability, rectifier/regulator failures can be common on older bikes.
Engine Performance Issues:
Carburetor jetting, ignition timing, or valve clearance can affect smooth running and power delivery.
