Segment:
Dual-sport / Enduro Motorcycle
Target Audience:
Off-road enthusiasts, trail riders, light commuting users seeking a robust and reliable Yamaha motorcycle.
Competitors:
Honda XR series, Kawasaki KLR series, Suzuki DR series, KTM EXC series (depending on specific year and configuration).
Design Philosophy:
Durable, versatile, and user-friendly dual-sport motorcycle emphasizing off-road capability with road-legal compliance.
Manual Value:
Provides essential information for owners and mechanics to maintain, repair, and troubleshoot the Yamaha TT-350 across a significant production run.
Applicable Years:
1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
Estimated Pages:
400-600 (Typical for a comprehensive service manual of this era)
Type:
Workshop Service Repair Manual
Engine:
Complete engine overhaul, lubrication, cooling, fuel delivery, ignition, exhaust, tuning
Transmission:
Clutch, gearbox internals, shifting mechanism, lubrication, maintenance
Chassis:
Frame, suspension (front and rear), steering system, wheels, tires, bearings
Brakes:
Front and rear brake systems (drum or disc depending on sub-model), hydraulic components, bleeding procedures, pad/shoe replacement
Electrical:
Wiring diagrams, battery, charging system (stator, regulator/rectifier), lighting, ignition system components, troubleshooting electrical faults
Fuel System:
Carburetor(s) (model specific, e.g., Mikuni), fuel lines, fuel pump (if applicable), fuel tank maintenance
Bodywork:
Body panels, fenders, seat, handlebars, controls, minor repair and disassembly
Maintenance:
Regular servicing, oil changes, filter replacements, chain adjustment, spark plug checks, valve clearance adjustment
Troubleshooting:
Diagnostic charts for common problems, symptom-based fault finding
Repair:
Step-by-step instructions for component removal, disassembly, inspection, repair, and reassembly
Rebuild:
Detailed procedures for engine and transmission component rebuilding
Depth:
Comprehensive, covering routine maintenance to complete engine and transmission overhauls, including detailed diagnostic procedures and specifications.
Engine Type:
Four-stroke, air-cooled, OHC, single-cylinder
Displacement:
Approximately 349cc (specific variations may exist)
Bore X Stroke:
Refer to specific year's manual for exact figures (e.g., 81.0 mm x 64.0 mm)
Horsepower:
Varies by year and tuning, typically in the 25-30 HP range.
Torque:
Varies by year and tuning, typically in the 20-25 lb-ft range.
Carburetor Model:
Typically a single Mikuni VM series carburetor (e.g., VM34).
Fuel Type:
Unleaded gasoline (Octane rating as per Yamaha specifications for the era, typically 87 AKI).
Oil Type:
API Service SE, SF, or SG classification, SAE 10W-40 or 20W-50 motorcycle-specific oil.
Cooling System:
Air-cooled
Ignition System:
CDI (Capacitor Discharge Ignition)
Transmission Type:
Constant-mesh, 6-speed sequential manual
Clutch Type:
Wet, multiple-disc clutch
Final Drive:
O-ring sealed chain drive
Transmission Oil Type:
API GL-4, SAE 80W or 90W hypoid gear oil (check manual for specific recommendation).
Overall Length:
Varies slightly by year, approximately 2200-2250 mm.
Overall Width:
Varies slightly by year, approximately 800-850 mm.
Overall Height:
Varies slightly by year, approximately 1250-1300 mm.
Dry Weight:
Approximately 115-125 kg (depending on specific model variant).
Seat Height:
Approximately 850-870 mm.
Ground Clearance:
Approximately 300-320 mm.
Safety Standards:
Meets relevant motorcycle safety standards for its production era. No formal crash test ratings for motorcycles in the same way as cars.
Braking System:
Disc front brake, drum rear brake (common configuration, some models may have dual discs).
Lighting:
Headlight, taillight, brake light, turn signals (depending on market specification).
Frame Construction:
Steel frame, designed for off-road durability and rider support.
Oil Change:
Every 3,000 km or 6 months, whichever comes first (check manual for precise interval).
Air Filter Cleaning:
Every 1,000 km or as needed in dusty conditions.
Spark Plug Replacement:
Every 6,000 km or as needed.
Valve Clearance Check:
Every 12,000 km or as needed.
Engine Oil Capacity:
Approximately 1.8 - 2.0 Liters with filter change (check manual).
Transmission Oil Capacity:
Approximately 0.7 - 0.9 Liters (check manual).
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid (check manual for exact specification).
Common Wear Items:
Clutch plates, brake pads/shoes, wheel bearings, steering head bearings, drive chain and sprockets, fork seals due to off-road use.
Carburetor Issues:
Carburetor gumming or jet blockage from infrequent use or fuel degradation.
Electrical Connections:
Corrosion or looseness in electrical connectors, particularly in exposed areas, can lead to intermittent faults.
Yamaha Legacy:
Yamaha Motor Company, established in 1955, has a long and storied history in motorsports and motorcycle manufacturing, known for innovation and performance across various categories.
Tt Series:
The TT series represents Yamaha's lineage of off-road focused motorcycles, evolving from earlier models like the DT series, offering increased performance and capability for enduro and trail riding.
Production Run:
The TT-350 enjoyed a significant production run from 1985 through 2000, indicating its popularity and market success as a reliable dual-sport machine.
Manufacturing Origin:
Japan
