Segment:
Dual-sport / Enduro motorcycle
Target Audience:
Riders seeking a reliable and capable off-road focused dual-sport motorcycle for trail riding, adventure touring, and light street use.
Competitors:
Honda XR350R, Kawasaki KLR250, Suzuki DR350.
Off Road Capability:
Long-travel suspension, robust engine, durable construction for off-road abuse.
Versatility:
Suitable for trail riding, exploring, and light commuting with appropriate modifications.
Covered Models:
Yamaha TT350, Yamaha TT350S
Covered Years:
1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
Estimated Page Count:
400-600 (typical for full service manuals covering this range)
Manual Type:
Full Service Repair Manual
Engine:
Complete overhaul, tuning, carburetor, lubrication system, cooling system (air-cooled specific details), ignition system, starting system.
Transmission:
Clutch, gearbox, gear shift mechanism, lubrication.
Chassis:
Frame, suspension (front forks, rear shock absorber, linkage), steering system, swingarm.
Electrical:
Wiring diagrams, lighting system, battery, charging system (stator, rectifier/regulator), ignition system, sensors.
Brakes:
Front and rear brake systems (drum or disc depending on specific TT350 variant), hydraulic components, brake bleeding procedures.
Fuel System:
Fuel tank, fuel lines, carburetor specifications and tuning, fuel filter.
Bodywork:
Body panels, seating, fenders, controls, instrument cluster.
Maintenance:
Regular maintenance schedules, oil changes, filter replacement, spark plug servicing, chain adjustment, brake adjustments, valve clearance checks.
Troubleshooting:
Diagnostic procedures for common and uncommon issues, symptom-based troubleshooting guides.
Repair:
Step-by-step overhaul and repair instructions for all major and minor components.
Disassembly Assembly:
Detailed instructions for removing and reinstalling components.
Wiring Diagrams:
Comprehensive electrical system schematics for accurate diagnostics and repairs.
Depth:
Comprehensive. Covers basic maintenance to full engine and transmission rebuilds, including electrical diagnostics and chassis repairs.
Engine Type:
Four-stroke, SOHC, air-cooled, single-cylinder
Displacement:
347cc (approximate)
Bore X Stroke:
80.0 mm x 69.6 mm (typical)
Compression Ratio:
9.5:1 (typical)
Horsepower:
Approx. 27-30 hp @ 7500 rpm (typical, varies by tuning and emission controls)
Torque:
Approx. 2.7 kg-m (19.5 lb-ft) @ 6000 rpm (typical)
Carburetor:
Mikuni VM34SS or similar (single constant velocity carburetor)
Fuel Type:
Unleaded gasoline
Fuel Tank Capacity:
Approx. 10-12 Liters (2.6-3.2 Gallons)
Transmission Type:
Constant mesh, 5-speed sequential
Clutch Type:
Wet, multiple disc
Gear Ratios:
Specific ratios available in manual (e.g., 1st: 2.833, 2nd: 1.944, 3rd: 1.440, 4th: 1.130, 5th: 0.917)
Transmission Oil Capacity:
Approx. 1.0-1.2 Liters (refer to manual for exact spec)
Transmission Oil Specification:
Yamalube 4 (or equivalent SAE 10W-40 API SG)
Length:
Approx. 2170 mm (85.4 in)
Width:
Approx. 820 mm (32.3 in)
Height:
Approx. 1215 mm (47.8 in)
Wheelbase:
Approx. 1405 mm (55.3 in)
Ground Clearance:
Approx. 290 mm (11.4 in)
Dry Weight:
Approx. 120-130 kg (265-287 lbs)
Curb Weight:
Approx. 135-145 kg (298-320 lbs) (with fluids)
Gross Vehicle Weight Rating Gvwr:
Refer to manual (typically around 300-320 kg)
Seat Height:
Approx. 885 mm (34.8 in)
Safety Certification:
Not applicable for off-road motorcycles in the same way as cars; designed for off-road use.
Braking System:
Front: Disc brake; Rear: Drum brake (early models) or Disc brake (later models). Specifics depend on sub-model and region.
Lighting:
Headlight, taillight, brake light, turn signals (variable by region/model year).
Frame Construction:
Steel semi-double cradle frame for durability.
Instrumentation:
Analog speedometer, odometer, tachometer (on some models), neutral indicator, turn signal indicators, high beam indicator.
Rider Aids:
None (typical for motorcycles of this era)
Connectivity Features:
None
Engine Oil Change:
Every 3,000 km (1,800 miles) or 6 months.
Oil Filter Replacement:
Every 6,000 km (3,600 miles) or 12 months.
Spark Plug Check Clean Gap:
Every 3,000 km (1,800 miles)
Air Filter Cleaning:
Every 1,000 km (600 miles) or as needed based on conditions.
Valve Clearance Check:
Every 6,000 km (3,600 miles)
Engine Oil Specification:
Yamalube 4 (or equivalent SAE 10W-40 API SG).
Engine Oil Capacity:
Approx. 1.7 Liters (1.8 US qt) without filter change, 1.9 Liters (2.0 US qt) with filter change.
Fork Oil Type:
Yamaha Fork Oil G10 (or equivalent SAE 10W)
Fork Oil Capacity:
Refer to manual for specific fork leg capacity (typically around 400-500ml).
Carburetor Gumming:
Common issue on older carbureted bikes if fuel sits too long; requires cleaning.
Suspension Seals:
Fork seal leaks can occur with age and hard use, requiring replacement.
Electrical Connections:
Corrosion or loose connections in wiring harness can cause intermittent electrical issues.
Cam Chain Tensioner:
Some models may develop a noisy cam chain tensioner; manual will detail inspection and replacement.
Yamaha Offroad Legacy:
Yamaha has a long-standing reputation for producing high-performance and durable off-road motorcycles, dating back to its early motocross and enduro models.
Tt Series Lineage:
The TT series has a history of reliable dual-sport and enduro machines. The TT350 built upon this with a focus on balanced performance and longevity.
Manufacturing Origin:
Japan (primarily)
Model Variants:
TT350 (standard off-road oriented) and TT350S (often with slight variations in suspension, styling, or emissions equipment for street legality).
