Vehicle Segment:
Entry-level youth/beginner dirt bike, often used for recreational riding and trail use.
Key Competitors:
Honda CRF70F, Kawasaki KLX110, Suzuki DR-Z70/90.
Target Audience:
Young riders transitioning from smaller bikes or learning to ride.
Ease Of Use:
Designed for simplicity and ease of operation, with features like an automatic clutch.
Primary Coverage:
2005 Yamaha TT-R90E Motorcycle
Secondary Coverage:
Maintenance, Repair, Troubleshooting, Diagnostics, Specifications
Estimated Page Count:
300-400 pages (typical for a comprehensive service manual)
Manual Type:
Combined Owner's and Motorcycle Service Repair Manual
Format:
Likely PDF, but may also be available in printed form.
Engine:
Complete engine overhaul, top-end and bottom-end procedures, valve adjustments, carburetor tuning, ignition system, starting system, lubrication system.
Transmission:
Clutch operation, gear shifting mechanism, transmission disassembly and reassembly, lubrication.
Chassis And Suspension:
Front fork overhaul, rear shock absorber inspection and service, swingarm service, steering head bearing maintenance, wheel bearing service.
Braking System:
Front and rear brake system inspection, pad replacement, caliper service, brake fluid bleeding and replacement.
Electrical System:
Wiring diagrams, lighting system, ignition coil, CDI unit, battery maintenance, charging system inspection.
Fuel System:
Fuel tank inspection, fuel petcock service, carburetor cleaning and adjustment, fuel filter replacement.
Maintenance:
Scheduled maintenance intervals, oil changes, filter replacements, chain adjustment, tire pressure checks.
Troubleshooting:
Diagnostic charts for common problems, identifying and resolving issues related to starting, running, and performance.
Repair:
Step-by-step repair procedures for all major components and systems, including disassembly, cleaning, inspection, and reassembly.
Technical Specifications:
Torque specifications for fasteners, engine tolerances, fluid capacities, electrical specifications, component dimensions.
Diagnostics:
Basic electrical system troubleshooting, engine performance diagnosis, suspension tuning guidance.
Depth Of Coverage:
Comprehensive, covering everything from basic owner checks to complete engine rebuilds and electrical system diagnostics, mirroring dealership-level service.
Engine Rebuilds:
Detailed steps for piston replacement, cylinder inspection, crankshaft and connecting rod checks.
Suspension Overhaul:
Complete guide to servicing front forks (oil changes, seal replacement) and rear shock.
Electrical Schematics:
Includes comprehensive wiring diagrams for accurate troubleshooting of lighting, ignition, and charging systems.
Engine Type:
4-stroke, SOHC, air-cooled
Bore X Stroke:
47.0 mm x 51.1 mm
Valve Clearance Intake:
0.05 mm (cold)
Valve Clearance Exhaust:
0.07 mm (cold)
Starting System:
Kick starter
Cooling System:
Forced air cooling
Horsepower:
Approx. 7-8 HP (estimated, actual figures often not officially published for this class)
Torque:
Not readily available, but designed for low-end torque.
Carburetor Model:
Mikuni VM17
Fuel Type:
Unleaded gasoline
Fuel Tank Capacity:
3.0 L (0.8 US gal)
Ignition System:
CDI (Capacitor Discharge Ignition)
Oil Type:
Yamaha Yamalube 4 or equivalent SAE 10W-30 API SE, SF, SG type motor oil
Oil Capacity:
0.9 L (0.95 US qt) without filter change, 1.0 L (1.06 US qt) with filter change.
Engine Oil Change:
Every 1000 km (600 miles) or 6 months, whichever comes first.
Air Filter Cleaning:
Every 500 km (300 miles) or every 6 months, depending on riding conditions.
Spark Plug Inspection:
Every 2000 km (1200 miles) or 12 months.
Valve Clearance Check:
Every 4000 km (2400 miles) or 24 months.
Brake Fluid:
DOT 3 or DOT 4 hydraulic brake fluid.
Gear Oil:
Refer to manual for specific gear oil, typically a lighter viscosity for the transmission.
Common Wear Items:
Brake pads, chain and sprockets, tires, air filter, spark plug. Carburetor can be prone to clogging if fuel is left sitting for long periods.
Potential Performance Issues:
Carburetor jetting might need adjustment if air filter is dirty or if modified exhaust is fitted. Valve clearance drift can affect performance.
Yamaha Legacy:
Yamaha Motor Company has a long-standing reputation for producing reliable and high-performance motorcycles across various disciplines, including off-road.
Tt-R Lineage:
The TT-R line of motorcycles is Yamaha's range of trail bikes, designed for recreational riding and off-road fun. The TT-R90E is an evolution of smaller displacement trail bikes, offering an automatic clutch for ease of use.
Production Period:
The TT-R90E was produced for several years, with the 2005 model being part of this established lineage.
Manufacturing Location:
Likely manufactured in Japan or other Yamaha production facilities.
