🏷️ Basic Information

Make:

Yamaha

Model:

TTR 90

Model Nickname:

TTR90

Model Family:

TTR Series (Off-Road)

Vehicle Type:

Off-Road Motorcycle / Mini Dirt Bike

Generation:

First Generation (Specific to TTR 90)

Chassis Code Range:

Likely starts with 5PB or similar Yamaha designation for this era/model

👋 Introduction

Target Audience:

Owners of Yamaha TTR 90 motorcycles (2004-2006 models) seeking to perform their own maintenance and repairs, as well as professional motorcycle technicians.

Value Proposition:

Provides essential, manufacturer-level technical data in multiple languages, enabling confident and accurate servicing of the TTR 90. Crucial for maintaining performance and extending the lifespan of a popular mini dirt bike.

Multilingual Support:

Availability in English, French, and German significantly enhances usability for a wider customer base, especially in international markets.

Digital Accessibility:

Digital format allows for instant access, easy searching, and on-demand printing of specific sections, offering superior convenience over traditional print manuals.

Comprehensiveness:

Designed to cover all aspects of maintenance and repair, from basic checks to full engine overhauls, making it a complete resource.

📋 Manual Details

Coverage Years:

2004, 2005, 2006

Geographic Coverage:

Global (as supported by language options)

Estimated Page Count:

High (Typically 300-600+ pages for a comprehensive workshop manual)

Manual Type:

Digital Workshop Repair Manual

Purpose:

Repair, Maintenance, Rebuild, Refurbish, Restoration

Languages Included:

English, French, German

Digital Format:

Digital (likely PDF or similar e-book format)

📖 Manual Coverage

Engine System:

Complete engine overhaul, carburetor tuning, valve clearance adjustment, ignition system, cooling system (air-cooled), exhaust system.

Transmission System:

Clutch operation, gearbox disassembly and reassembly, shift mechanism, lubrication.

Fuel System:

Carburetor model identification, disassembly, cleaning, jetting, float bowl adjustment, fuel tank, fuel lines.

Electrical System:

Wiring diagrams, lighting circuits, ignition system components (CDI, spark plug), battery maintenance, charging system (if applicable).

Chassis And Frame:

Frame inspection, front fork assembly, rear shock absorber, steering system, swingarm.

Braking System:

Front and rear brake operation (likely drum brakes for this model), cable adjustment, pad/shoe inspection and replacement.

Wheel And Tire System:

Wheel bearing inspection, tire pressure recommendations, spoke tension, wheel removal and installation.

Bodywork And Controls:

Seat removal, body panel attachment, handlebar controls, lever adjustments, footpegs.

Maintenance Procedures:

Regular inspection, lubrication points, cleaning, filter replacement (air, fuel).

Troubleshooting:

Diagnostic guides for common running issues, starting problems, electrical faults.

Repair Procedures:

Step-by-step instructions for component disassembly, repair, and reassembly.

Rebuild Procedures:

Detailed guidance for complete engine or gearbox overhauls.

Depth Of Information:

Comprehensive workshop level, suitable for experienced mechanics and ambitious DIY enthusiasts.

Diagnostic Capabilities:

Includes fault finding charts and symptom-based troubleshooting.

Special Tools:

Lists required special tools for specific maintenance and repair tasks.

📊 Manual Specifications

File Format Details:

Likely PDF, ensuring compatibility with most devices. Searchable text is a key benefit of high-quality digital manuals.

Print Quality Notes:

Digital format allows for high-resolution printing of individual pages or sections if desired.

Binding Type Digital:

N/A (Digital format)

Paper Type Digital:

N/A (Digital format)

⚙️ Engine Specifications

Engine Type:

Four-stroke, SOHC

Engine Displacement:

88cc (likely)

Bore X Stroke:

Specifics would be detailed in the manual (e.g., 47.0 x 51.8 mm for similar models)

Cooling System:

Air-cooled

Compression Ratio:

Details in manual (likely around 9.5:1 - 10.5:1)

Fuel Delivery:

Carburetor (likely Mikuni VM series, e.g., VM18 or similar)

Ignition System:

CDI (Capacitor Discharge Ignition)

Starting System:

Kickstarter

Horsepower Estimate:

Varies by tuning, typically in the 6-9 HP range for this class.

Torque Estimate:

Details in manual; torque figures are less commonly published for this type of motorcycle.

Carburetor Model Specification:

Specific model number (e.g., Mikuni VM18SH or similar) and jetting specifications are crucial and found within.

Fuel Type:

Unleaded gasoline

Fuel Tank Capacity:

Approximately 4.5 Liters (specific capacity in manual)

🔧 Transmission

Transmission Type:

Constant mesh, 4-speed

Clutch Type:

Wet, multi-plate

Gear Ratios:

Detailed in the manual (Primary drive, 1st, 2nd, 3rd, 4th, Final drive ratios).

Transmission Operation:

Standard sequential shifting (1-N-2-3-4).

Transmission Fluid Type:

Yamalube or equivalent SAE 10W-30 or SAE 20W-40 API SG motorcycle oil (specific recommendation in manual).

📐 Dimensions

Overall Length:

Approximately 1675 mm (specific figures in manual)

Overall Width:

Approximately 760 mm (specific figures in manual)

Overall Height:

Approximately 1030 mm (specific figures in manual)

Seat Height:

Approximately 735 mm (specific figures in manual)

Wheelbase:

Approximately 1175 mm (specific figures in manual)

Dry Weight:

Approximately 76 kg (specific figures in manual)

Wet Weight:

Estimated around 80 kg (with fluids)

Front Tire Size:

2.50-14 (typical)

Rear Tire Size:

3.00-12 (typical)

Wheelbase Measurement Type:

Center of front wheel to center of rear wheel

🛡️ Safety Features

Safety Ratings Motorcycle:

N/A (Motorcycles are not typically assigned NCAP or similar crash ratings)

Braking System Type:

Front drum brake, Rear drum brake (standard for this model)

Suspension Type:

Telescopic front fork, Monoshock rear swingarm.

Lighting System:

Headlight, Taillight/Brake light, front/rear reflectors (as required by local regulations).

💡 Technology Features

Infotainment Features:

None (This is a basic off-road motorcycle, focusing on function over features).

Driver Assistance Systems:

None.

Connectivity Features:

None.

🔧 Maintenance

Oil Change Interval:

Every 1000 km or 6 months, whichever comes first (typical, refer to manual for exact interval and break-in service).

Air Filter Cleaning:

Recommended every 1000 km or more frequently in dusty conditions. Manual will specify.

Valve Clearance Check:

Typically at 1000 km or annually (specific interval in manual).

Spark Plug Replacement:

As needed or at major service intervals; manual will provide recommended type and gap.

Engine Oil Specification:

SAE 10W-30 or SAE 20W-40 API SG motorcycle oil (as per manual).

Brake Fluid Type:

DOT 3 or DOT 4 brake fluid (for hydraulic brakes, if applicable; TTR 90 likely has cable-actuated drum brakes, so fluid is less critical unless for master cylinder in some configurations).

Engine Oil Capacity:

Approximately 0.9 - 1.0 Liters (specific capacity in manual).

Common Wear Items:

Clutch plates, brake shoes, chain and sprockets, air filter due to off-road use.

Carburetor Tuning Sensitivity:

Carburetors on smaller off-road bikes can be sensitive to altitude and temperature changes, requiring periodic adjustment for optimal performance.

Kickstarter Mechanism:

The kickstart mechanism, while generally robust, can wear over time with heavy use. The manual will detail lubrication and inspection points.

📚 Vehicle History

Yamaha Motorcycle Legacy:

Yamaha has a long-standing reputation for building reliable and performance-oriented motorcycles across all disciplines, from road racing to off-road.

Ttr Series Context:

The TTR series is Yamaha's line of off-road trail bikes, known for their ease of use and durability. The TTR 90 is positioned as an entry-level model for younger riders or smaller adults.

Ttr 90 Market Placement:

Introduced as a step up from smaller 50cc models, bridging the gap to more performance-oriented 125cc and larger off-road machines.

Production Period:

The TTR 90 was produced for a limited number of years, with the 2004-2006 models being the primary focus of this manual.

Manufacturing Location:

Typically manufactured in Japan or through Yamaha's global production facilities. Specifics would require deeper historical research.

🏆 Awards & Recognition

Motorcycle Awards:

The TTR 90 itself likely did not receive specific industry awards in the traditional sense, but the TTR line is recognized for its reliability and suitability for entry-level riders.

Consumer Ratings:

Generally positive for its intended use as a durable and capable mini dirt bike for youth riders.

Emission Standards:

Compliant with relevant emission standards for its production period and market. Manual may detail specific emission control components.