Segment:
Entry-level to mid-range dual-sport and trail riding motorcycles.
Competitors:
Honda XL series, Suzuki DR series, Kawasaki KLR/KLX series of the same era.
Design Philosophy:
Robust, reliable, and versatile for both on-road use and off-road trail riding, prioritizing durability over outright performance.
Engine:
Detailed disassembly, assembly, inspection, tuning, and repair of the 340cc air-cooled 4-stroke engine.
Transmission:
Complete coverage of the 5-speed transmission, including inspection, repair, and adjustment of gear shifting mechanisms.
Fuel System:
Carburetor (likely Mikuni VM series) disassembly, cleaning, adjustment, and jetting information; fuel tank and petcock service.
Electrical System:
Ignition system (CDI), lighting, charging system (stator, regulator/rectifier), starting system (kick-start primarily), wiring diagrams, component testing.
Chassis And Suspension:
Front fork (telescopic) disassembly, service, and adjustment; rear shock absorber inspection and replacement; swingarm and linkage service.
Brakes:
Front and rear brake system service, including hydraulic (if applicable) or cable actuation, brake pad inspection and replacement, and brake fluid (if applicable) maintenance.
Wheels And Tires:
Wheel bearing inspection and replacement, spoke tension adjustment, tire pressure specifications, and recommended tire sizes.
Frame And Bodywork:
Frame inspection, seat removal, fender and plastic component service, handlebar and control assembly.
Maintenance:
Scheduled maintenance tasks, oil changes, air filter cleaning/replacement, spark plug replacement, chain adjustment, valve clearance checks.
Troubleshooting:
Diagnostic charts for common problems related to starting, running, electrical issues, and braking.
Repair:
Step-by-step instructions for major component repairs and overhauls, including engine rebuilds and suspension servicing.
Disassembly And Assembly:
Comprehensive guides for the removal and reinstallation of all major motorcycle components.
Depth:
Full factory-level service information, suitable for professional mechanics and advanced DIY enthusiasts.
Torque Specifications:
Includes critical torque values for engine, chassis, and suspension fasteners.
Wiring Diagrams:
Detailed electrical system diagrams for troubleshooting and repair.
Engine Type:
Air-cooled, four-stroke, single-cylinder, SOHC (likely)
Displacement:
Approximately 340cc (exact figure may vary slightly by sub-model or year).
Bore X Stroke:
Specific dimensions to be detailed in the manual.
Compression Ratio:
Specific ratio to be detailed in the manual.
Horsepower:
Estimated 25-30 HP (at crankshaft), exact figures in manual.
Torque:
Estimated 20-25 lb-ft, exact figures in manual.
Carburetor Type:
Single Mikuni VM series carburetor (e.g., VM34 or similar).
Fuel Type:
Unleaded gasoline, Octane Rating specified in manual.
Oil Type:
Yamalube or equivalent SAE 10W-40 motorcycle oil (specific grade and API classification in manual).
Oil Capacity:
Approximately 1.5-2.0 liters (exact figure in manual).
Length:
Details available in the manual.
Width:
Details available in the manual.
Height:
Details available in the manual.
Dry Weight:
Approximately 270-290 lbs (122-132 kg), precise figures in manual.
Wet Weight:
Estimated around 300-320 lbs (136-145 kg) with fluids.
Front Suspension:
Telescopic fork with adjustable pre-load (likely), specific travel and damping details in manual.
Rear Suspension:
Monocross suspension with adjustable shock absorber (spring pre-load and damping), specific travel and details in manual.
Front Tire Size:
Commonly 3.00-21, specific recommendations in manual.
Rear Tire Size:
Commonly 4.60-18 or 110/80-18, specific recommendations in manual.
Wheel Bolt Pattern:
N/A (spoked wheels with axle nuts)
Safety Standards:
Manufactured to meet relevant safety regulations for motorcycles of its era. No formal crash test ratings exist for this type of vehicle.
Braking System:
Front disc brake, rear drum brake (typical for the early years, later models may have rear disc). Specific details in manual.
Lighting:
Headlight, taillight, brake light, turn signals (depending on market variant).
Oil Change:
Recommended every 3,000-5,000 km or annually (specific interval in manual).
Air Filter Cleaning:
Recommended every 1,000-2,000 km or as needed based on riding conditions (detailed in manual).
Valve Clearance Check:
Typically every 6,000-10,000 km or annually (specific interval and procedure in manual).
Engine Oil Grade:
SAE 10W-40 (API SG or higher recommended, consult manual for exact specification).
Brake Fluid:
DOT 3 or DOT 4 (if hydraulic brakes are equipped, check manual for specific requirement).
Common Wear Items:
Cam chain tensioner, carburetor seals and jets, fork seals, wheel bearings, swingarm bushings, clutch plates.
Ignition Coil:
Occasionally known to fail, leading to no spark issues.
Exhaust Gaskets:
Can degrade over time leading to exhaust leaks.
Yamaha Motorsports:
Yamaha has a long and successful history in motorcycle racing and production, known for innovation and reliability.
Tt Series:
The TT series represents Yamaha's line of off-road and dual-sport motorcycles, evolved from their competitive motocross heritage.
Manufacturing Location:
Likely Japan, consistent with Yamaha's primary manufacturing hubs for this period.
Production Span:
Produced over a significant period from 1985 to 2000, indicating a popular and enduring model.
