🏷️ Basic Information

Make:

Yamaha

Model:

TTR90 / TT-R90E

Model Variant:

TT-R90E (Electric Start)

Product Type:

Workshop Service Repair Manual

Applicable Years:

2007, 2008, 2009

👋 Introduction

Target Audience:

Owners and independent mechanics seeking to maintain and repair their Yamaha TTR90 / TT-R90E.

Product Category:

Powersports - Off-Road Motorcycle Service Manuals

Key Selling Point:

Provides comprehensive and detailed repair information for a specific model and year range, crucial for DIY maintenance and repair.

Completeness:

Covers all aspects of the motorcycle from basic maintenance to engine rebuilds, offering a complete resource.

Accuracy:

Derived from official Yamaha service data, ensuring accurate technical specifications and procedures.

Accessibility:

Digital PDF format allows for easy viewing, searching, and printing of specific sections.

📋 Manual Details

Engine Service:

Complete Engine Overhaul and Reassembly

Transmission Service:

Gearbox Inspection, Repair, and Maintenance

Chassis Service:

Frame, Suspension, and Steering System Maintenance

Electrical Service:

Wiring Diagrams, Ignition System, Lighting, and Starting System

Braking System:

Front and Rear Brake System Service and Adjustment

Fuel System:

Carburetor Service, Fuel Lines, and Tank Maintenance

Cooling System:

Air Cooling System Details

Exhaust System:

Exhaust Pipe and Muffler Service

Body And Frame:

Body Panels, Seat, Handlebars, and Footpegs

Troubleshooting:

Diagnostic Charts and Common Issue Resolution

Estimated Pages:

200-300 (typical for this level of detail)

Manual Type:

Workshop Service Manual / Repair Manual

Language:

English

Format:

Downloadable PDF

📖 Manual Coverage

Engine System:

Complete internal and external engine components, including piston, rings, cylinder, crankshaft, camshaft, valves, timing, and lubrication.

Transmission System:

Clutch operation, gearbox components, gear shifting mechanism, and final drive (chain).

Fuel And Emission Control:

Carburetor (VM17 type), fuel delivery, fuel tank, petcock, and basic emission control aspects relevant to the model.

Electrical System:

CDI ignition system, lighting (headlight, taillight, brake light), horn, battery, starter motor, and charging system (stator).

Suspension System:

Front telescopic forks (including oil type and level) and rear monoshock suspension (including spring preload adjustment).

Braking System:

Front and rear drum brake systems, including brake shoe replacement, linkage adjustment, and lever free play.

Cooling System:

Air-cooled engine cooling efficiency and heat dissipation.

Wheel And Tire Assembly:

Wheel bearing maintenance, tire pressure specifications, and spoke tension checks.

Controls And Cables:

Throttle cable, clutch cable, and brake cable adjustment and lubrication.

Preventative Maintenance:

Regular service checks, lubrication points, filter replacements, and bolt torquing.

Engine Repair:

Piston and cylinder replacement, valve adjustment, decarbonizing, crankshaft and connecting rod inspection, and camshaft timing.

Transmission Repair:

Clutch plate replacement, gearbox component inspection, and reassembly.

Carburetor Tuning:

Carburetor disassembly, cleaning, adjustment (idle speed, mixture), and jetting information.

Electrical Troubleshooting:

Diagnosis of ignition faults, lighting issues, and starting system problems using wiring diagrams.

Suspension Overhaul:

Fork seal replacement, fork oil changes, and rear shock absorber servicing.

Brake System Service:

Brake shoe replacement, drum cleaning, and adjustment procedures.

Wheel And Tire Maintenance:

Tire pressure checks, spoke tightening, and wheel bearing lubrication.

Cable Adjustment:

Precise instructions for adjusting throttle, clutch, and brake cables for optimal performance.

Cleaning And Lubrication:

Detailed schedules and specifications for cleaning and lubricating all moving parts.

Depth Of Information:

Comprehensive, covering routine maintenance to full engine and component rebuilds.

Diagnostic Capability:

Includes diagnostic charts and troubleshooting procedures for identifying and resolving common issues.

Special Tools:

Lists and describes any specialized tools required for specific repair procedures.

Torque Specifications:

Provides detailed torque specifications for all critical fasteners.

Clearances And Tolerances:

Specifies all necessary engine and component clearances and tolerances for proper operation.

📊 Manual Specifications

File Type:

PDF

Searchability:

Typically searchable text within the PDF for quick information retrieval.

Image Resolution:

High-resolution diagrams and illustrations suitable for printing.

Layout:

Professionally formatted with clear headings, step-by-step instructions, and graphical aids.

Binding:

N/A (Digital Download)

Paper Quality:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Type:

Four-stroke, SOHC

Displacement:

88 cc

Bore X Stroke:

47 x 51.1 mm

Compression Ratio:

9.5:1

Cooling Method:

Forced Air Cooling

Ignition System:

CDI (Capacitor Discharge Ignition)

Starting System:

Electric and Kick Starter

Horsepower:

Approximately 6.8 HP @ 8,000 RPM (spec may vary slightly by region/year)

Torque:

Approximately 7.0 Nm @ 6,000 RPM (spec may vary slightly by region/year)

Carburetor Model:

Mikuni VM17SS (or similar)

Fuel Type:

Unleaded Gasoline (87 octane minimum)

Fuel Tank Capacity:

3.5 Liters (0.9 US gal)

Engine Oil Type:

Yamalube 4 (or equivalent SAE 10W-30 API SG or higher)

Engine Oil Capacity:

0.80 Liters (0.85 US qt)

Fork Oil Type:

Yamaha Suspension Oil (or SAE 5W)

Fork Oil Capacity:

Approx. 250 ml per fork leg

🔧 Transmission

Transmission Type:

Constant mesh, 4-speed

Clutch Type:

Wet, multiple disc

Final Drive:

Chain drive

Gear Selection:

Left foot operation (rotary pattern or standard)

Gear Ratios:

Typically includes: 1st: 2.500, 2nd: 1.750, 3rd: 1.333, 4th: 1.000 (Refer to manual for exact ratios)

📐 Dimensions

Length:

Approx. 1565 mm (61.6 in)

Width:

Approx. 735 mm (28.9 in)

Height:

Approx. 930 mm (36.6 in)

Seat Height:

Approx. 710 mm (28.0 in)

Wheelbase:

Approx. 1085 mm (42.7 in)

Dry Weight:

Approx. 70 kg (154 lbs)

Wet Weight:

Approx. 73 kg (161 lbs) (with all fluids)

Payload Capacity:

Not specified, designed for single rider use.

Front Tire Size:

2.50-12 4PR

Rear Tire Size:

3.00-10 4PR

Front Tire Pressure:

12 psi (0.8 kgf/cm²)

Rear Tire Pressure:

15 psi (1.0 kgf/cm²)

Front Wheel Type:

Spoked

Rear Wheel Type:

Spoked

Wheelbase:

1085 mm (42.7 in)

🛡️ Safety Features

Safety Certification:

Meets relevant safety standards for off-road motorcycles.

Braking System Type:

Drum brakes (front and rear) for controlled stopping power.

Suspension Stability:

Designed for predictable handling and stability during off-road riding.

Lighting System:

Headlight, taillight, and brake light for visibility.

Frame Construction:

Durable frame design to withstand off-road stresses.

Throttle Limiter:

Often equipped with a throttle stop screw for parental control over speed (mention if in manual).

💡 Technology Features

Infotainment System:

N/A (Basic off-road motorcycle with minimal electronic features).

Rider Aids:

N/A (Designed for direct rider control).

🔧 Maintenance

Oil Change Interval:

Every 1,000 km (600 miles) or 6 months, whichever comes first.

Air Filter Cleaning:

Every 500 km (300 miles) or more frequently in dusty conditions.

Spark Plug Inspection:

Every 1,000 km (600 miles).

Valve Clearance Check:

Every 4,000 km (2,500 miles) or 24 months.

Chain Lubrication Adjustment:

Every 500 km (300 miles) or after washing/wet conditions.

Brake System Inspection:

Every 1,000 km (600 miles).

Transmission Oil:

Yamalube Gear Oil or equivalent SAE 80 API GL-4 (Note: Some sources may indicate engine oil, consult manual specifically)

Carburetor Fouling:

Common issue due to infrequent use or poor fuel quality, often requires cleaning and tuning.

Electrical Connections:

Corrosion or loose connections on wiring can lead to intermittent electrical issues.

Chain Wear:

Regular maintenance is crucial to prevent premature chain and sprocket wear.

Fork Seals:

Leaking fork seals can occur with aggressive off-road use, requiring seal replacement.

📚 Vehicle History

Yamaha Legacy:

Yamaha Motor Company boasts a long and successful history in motorcycle manufacturing, known for innovation, performance, and reliability across various disciplines, including off-road.

Ttr Series Context:

The TTR series represents Yamaha's entry-level to mid-range off-road motorcycles, designed for recreational riding, trail riding, and as a platform for young riders. The TTR90 specifically caters to the younger demographic.

Production Period:

The TTR90 and TT-R90E were produced from the early 2000s through the late 2000s, with specific focus on the 2007-2009 model years for this manual.

🏆 Awards & Recognition

Industry Recognition:

While specific awards for the TTR90 might not be widely publicized, Yamaha's TTR line is generally well-regarded for its user-friendliness and durability in the entry-level off-road segment.

Reliability Ratings:

Yamaha motorcycles, including the TTR series, generally receive good reliability ratings from owners and industry publications for their robust engineering.

Emission Standards:

The manual will detail any specific emission control systems and their maintenance requirements to comply with relevant standards for the model years.