🏷️ Basic Information

Make:

Yamaha

Model:

TT350 / XT350 / TTR350 / TTR / TT-R350 / R350 / S / R / RE / L / C

Model Variants Covered:

TT350, XT350, TTR350, TTR, TT-R350, R350, S, R, RE, L, C

Production Years:

1985-2000

👋 Introduction

Segment:

Dual-sport / Off-road motorcycle

Target Audience:

Riders seeking a robust and capable dual-sport machine for trail riding, light street use, and general adventure touring.

Competitors Era:

Honda XR series, Suzuki DR series, Kawasaki KLR series, KTM EXC series.

Design Philosophy:

Yamaha's focus on performance, reliability, and off-road capability, translating the TT’s competitive motocross heritage into a more versatile dual-sport package.

📋 Manual Details

Primary Coverage:

Yamaha TT350, XT350, TTR350, and related variants

Year Coverage:

1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000

Estimated Pages:

Refer to product details for exact count (typically 300-500 pages for a comprehensive factory manual)

Type:

Factory Repair Manual / Service Manual

Language:

English

Format:

Digital Download (PDF)

📖 Manual Coverage

Engine:

Engine assembly, disassembly, top-end, bottom-end, valve train, lubrication, cooling system, ignition system, fuel system (carburetion), exhaust system.

Transmission:

Gearbox operation, disassembly, assembly, shifting mechanisms, lubrication.

Chassis And Suspension:

Frame, front fork (suspension), rear shock absorber (suspension), swingarm, steering assembly, wheel bearings, spokes, hubs.

Brakes:

Front and rear brake systems (disc or drum depending on model variant), hydraulic components, brake pads, calipers, master cylinders, levers, pedal.

Electrical System:

Wiring diagrams, lighting system, charging system (stator, regulator/rectifier), ignition system, battery, starter motor, horn, switches, indicators.

Fuel And Air System:

Carburetor (Mikuni VM series typically), fuel tank, fuel lines, air filter assembly, fuel petcock.

Body And Controls:

Body panels, seat, handlebars, levers, pedals, footpegs, cables (throttle, clutch), control linkages.

Maintenance:

Regular service intervals, oil changes, filter replacements, chain adjustment, lubrication points, spark plug service, air filter cleaning/replacement, brake fluid checks/changes.

Troubleshooting:

Diagnostic procedures for common issues, symptom-based troubleshooting guides, electrical system fault finding.

Repair:

Detailed step-by-step instructions for engine rebuilds, transmission overhauls, suspension repairs, brake system servicing, electrical component replacement, and bodywork.

Diagnostics:

Component testing, measurement specifications, common failure analysis.

Depth:

Comprehensive factory-level detail, suitable for DIY mechanics and professional technicians alike. Includes specifications, tolerances, and detailed diagrams.

📊 Manual Specifications

Format Details:

Digital PDF, typically searchable and printable. Quality of illustrations and text clarity is generally high for factory manuals.

Print Quality Notes:

N/A (Digital Download)

Binding Type Notes:

N/A (Digital Download)

Paper Type Notes:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Type:

4-stroke, SOHC, air-cooled, single-cylinder

Displacement:

347cc (approximate for TT350/XT350)

Bore X Stroke:

Approx. 80.0 mm x 69.6 mm (typical for this displacement range)

Compression Ratio:

Typically around 9.5:1 to 10.0:1

Horsepower Estimate:

Approx. 25-30 HP (at crankshaft)

Torque Estimate:

Approx. 20-24 lb-ft (at crankshaft)

Carburetor Type:

Single Mikuni VM series carburetor (e.g., VM34 or VM36)

Fuel Type:

Unleaded gasoline

Oil Capacity:

Approx. 1.5 - 1.8 Liters (refer to manual for exact fill levels)

Recommended Oil Viscosity:

SAE 10W-40 or 20W-50 (depending on climate, refer to manual)

Ignition Type:

CDI (Capacitor Discharge Ignition)

🔧 Transmission

Transmission Type:

Constant mesh, 5-speed sequential

Clutch Type:

Wet, multi-plate

Final Drive:

O-ring sealed chain drive

Transmission Oil Type:

Yamalube Gear Oil (or equivalent motorcycle-specific transmission oil)

Transmission Oil Capacity:

Approx. 0.8 - 1.0 Liters (refer to manual for exact fill level)

📐 Dimensions

Length:

Varies by specific model variant (typically around 85-90 inches)

Width:

Varies by specific model variant (typically around 33-35 inches)

Height:

Varies by specific model variant (typically around 50-55 inches)

Dry Weight:

Approx. 270-290 lbs (122-132 kg)

Wet Weight:

Approx. 290-310 lbs (132-140 kg)

Front Suspension Travel:

Approx. 9.5 - 11.2 inches (240 - 285 mm)

Rear Suspension Travel:

Approx. 10.0 - 11.0 inches (254 - 279 mm)

Front Wheel Size:

21-inch

Rear Wheel Size:

18-inch

Front Tire Size:

Commonly 80/100-21

Rear Tire Size:

Commonly 110/100-18 or 120/90-18

🛡️ Safety Features

Safety Ratings Notes:

Motorcycles typically do not receive NHTSA or IIHS crash test ratings. Safety depends on rider skill and adherence to safe riding practices.

Braking System:

Front disc brake, Rear drum or disc brake (depending on variant). ABS was not available.

Lighting:

Headlight, taillight, brake light, turn signals (depending on street legality/variant).

💡 Technology Features

Infotainment Features:

None (analog instrumentation: speedometer, odometer, indicator lights).

Driver Assistance Features:

None

Connectivity Features:

None

Engine Control:

Carburetor for fuel delivery, CDI for ignition timing. No electronic engine management systems.

🔧 Maintenance

Oil Change Interval:

Every 3,000-5,000 km or annually, whichever comes first (refer to manual for precise interval and conditions).

Air Filter Cleaning:

Every 1,000-2,000 km or as needed depending on riding conditions (dusty environments require more frequent cleaning).

Spark Plug Service:

Every 5,000-10,000 km (check and clean/gap, replace as needed).

Chain Lubrication Adjustment:

Every 500-1,000 km and before long rides.

Brake Fluid Type:

DOT 3 or DOT 4 hydraulic brake fluid (ensure compatibility).

Coolant Capacity:

Not applicable (air-cooled engine)

Fuel Tank Capacity:

Approx. 10-11 Liters (2.6-2.9 US gallons)

Common Wear Items:

Clutch wear, carburetor jetting issues due to age, fork seal leaks, rear shock absorber degradation, stator failures (less common but possible), drive chain and sprockets.

Troubleshooting Focus Areas:

Starting difficulties (carburetor or ignition related), poor idle, hesitation under acceleration, electrical gremlins (corroded connections).

📚 Vehicle History

Yamaha Offroad Legacy:

Yamaha has a long and successful history in off-road motorcycling, dating back to the iconic DT and TT series. The TT350 and XT350 build upon this heritage.

Tt350 Xt350 Lineage:

The TT350 was largely a competition-oriented dual-sport, while the XT350 was its more street-friendly counterpart. This manual likely covers both or a shared platform with variations.

Manufacturing Location:

Primarily Japan

Market Introduction:

Mid-1980s, with production running for a significant period, indicating its popularity and robustness.

🏆 Awards & Recognition

Model Recognition:

Praised for its reliability, off-road prowess, and relatively simple mechanical design. A favored machine for dual-sport conversions and reliable trail riding.

Owner Satisfaction:

Generally high among owners who maintain them correctly, appreciating their durability and capability.