🏷️ Basic Information

Make:

Yamaha

Model:

TT-R225/L

Year:

2003

Product Type:

Service Repair Manual

Product Subtype:

Dealership Level Repair Manual

👋 Introduction

Segment:

Dual-sport / Trail motorcycle

Target Audience:

Off-road enthusiasts, recreational riders, light trail use

Competitors:

Honda CRF230F, Kawasaki KLX250S, Suzuki DR-Z250

Vehicle Type:

Lightweight, air-cooled, four-stroke, dual-sport motorcycle

Ride Characteristics:

User-friendly, reliable, capable on trails and moderate road use

Manual Value Proposition:

Provides dealership-level diagnostic and repair information, enabling cost-effective maintenance and repairs

📋 Manual Details

Covered Models:

2003 Yamaha TT-R225, 2003 Yamaha TT-R225L

Estimated Pages:

300+

Type:

Service and Repair Manual

Language:

English

Format:

Digital (likely PDF)

📖 Manual Coverage

Engine Mechanical:

Engine disassembly, assembly, tuning, specifications, torque values, component identification

Engine Electrical:

Ignition system, CDI unit, ignition timing, spark plugs, starter motor, charging system, wiring diagrams

Fuel System:

Carburetor (Mikuni VM26SS), fuel lines, fuel tank, fuel filter, fuel pump (if applicable), jetting specifications

Transmission:

Clutch operation, gear shifting mechanism, transmission gears, bearings, lubrication, disassembly and assembly

Drivetrain:

Drive chain, sprockets (front and rear), chain adjustment, replacement, lubrication specifications

Suspension:

Front forks (telescopic), rear shock absorber, spring preload adjustment, damping settings, fork oil type and level, seal replacement

Brakes:

Front disc brake, rear drum brake, brake fluid specifications (DOT 3/4), brake pad inspection/replacement, caliper service, master cylinder, brake line bleeding

Electrical System:

Lighting (headlight, taillight, turn signals), battery maintenance, fuses, horn, wiring harness, troubleshooting electrical faults

Chassis Frame:

Frame inspection, engine mounting, swingarm, steering head bearings, wheel bearings

Bodywork:

Fairings, fenders, seat, fuel tank cover, removal and installation procedures

Routine Maintenance:

Oil changes, filter replacements, chain lubrication/adjustment, spark plug checks, air filter cleaning/replacement

Troubleshooting:

Diagnostic procedures for common problems, symptom-based troubleshooting guides

Repair Procedures:

Step-by-step instructions for component repair and replacement

Disassembly Assembly:

Detailed instructions for taking apart and putting back together major components and the entire motorcycle

Tuning Adjustment:

Carburetor tuning, ignition timing adjustment, suspension adjustments, cable adjustments

Depth:

Comprehensive, suitable for both novice and experienced mechanics

Diagnostic Capabilities:

Detailed diagnostics for engine performance, electrical issues, and mechanical failures

Rebuild Guidance:

Includes procedures for complete engine rebuilds and major component overhauls

📊 Manual Specifications

File Type:

PDF

Searchability:

Searchable text content for quick information retrieval

Printability:

Printable pages for hard copy reference

Illustration Clarity:

High-quality illustrations, diagrams, and photographs

Binding:

N/A (Digital Format)

Paper:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Type:

Four-stroke, SOHC, air-cooled, single-cylinder

Displacement:

223 cc

Bore X Stroke:

67.0 mm x 63.4 mm

Compression Ratio:

9.5:1

Valve Clearance Intake:

0.04 - 0.08 mm (cold)

Valve Clearance Exhaust:

0.06 - 0.10 mm (cold)

Lubrication System:

Wet sump

Horsepower Estimated:

Approx. 16-18 HP @ 7500 RPM (varies by market and tuning)

Torque Estimated:

Approx. 13-15 lb-ft @ 5500 RPM (varies by market and tuning)

Carburetor Model:

Mikuni VM26SS

Carburetor Main Jet Spec:

125 (example, verify in manual)

Carburetor Pilot Jet Spec:

17.5 (example, verify in manual)

Carburetor Needle Spec:

5G58-3 (example, verify in manual)

Fuel Type:

Unleaded gasoline, minimum 87 octane

Fuel Tank Capacity:

2.6 US gallons (9.8 L)

🔧 Transmission

Transmission Type:

5-speed constant mesh

Clutch Type:

Wet, multi-plate

Clutch Fluid Spec:

Yamalube 4 (or equivalent SAE 10W-40 API SG)

Gear Ratios:

Detailed in manual (e.g., 1st: 2.643, 2nd: 1.944, 3rd: 1.400, 4th: 1.130, 5th: 0.917)

📐 Dimensions

Length:

Approx. 82.1 inches (2085 mm)

Width:

Approx. 31.7 inches (805 mm)

Height:

Approx. 45.1 inches (1145 mm)

Seat Height:

Approx. 35.0 inches (889 mm)

Ground Clearance:

Approx. 10.6 inches (270 mm)

Wheelbase:

Approx. 54.1 inches (1375 mm)

Dry Weight:

Approx. 238 lbs (108 kg)

Wet Weight:

Approx. 258 lbs (117 kg) (includes all fluids)

Gross Vehicle Weight Rating:

Not typically specified, but consult manual for load limits

🛡️ Safety Features

Crash Test Results:

Not applicable for off-road motorcycles

Braking System:

Front disc brake, rear drum brake

Lighting:

Headlight, taillight, brake light, front/rear position lights (some models may have turn signals)

Frame Construction:

Steel semi-double cradle frame

💡 Technology Features

Infotainment System:

None (basic motorcycle, no modern infotainment features)

ABS:

Not equipped

Traction Control:

Not equipped

Bluetooth Connectivity:

Not equipped

🔧 Maintenance

Engine Oil Change:

Every 1,000 miles (1,600 km) or 6 months, whichever comes first (refer to manual for exact mileage).

Oil Filter Replacement:

At every oil change (refer to manual for specific filter part number).

Air Filter Cleaning:

Every 600 miles (1,000 km) or more frequently in dusty conditions.

Spark Plug Check:

Every 1,000 miles (1,600 km).

Chain Lubrication:

Every 300 miles (500 km) or after washing/heavy rain.

Engine Oil Type:

Yamalube 4 (or equivalent SAE 10W-40 API SG/SH/SJ/SL)

Engine Oil Capacity:

1.70 US qt (1.6 L) without filter change, 1.80 US qt (1.7 L) with filter change.

Fork Oil Type:

Yamaha Fork Oil G-10 (or equivalent SAE 10W)

Fork Oil Level:

133 mm (5.24 in) from the top of the inner tube with the spring removed and the outer tube fully compressed.

Brake Fluid:

DOT 3 or DOT 4

Carburetor Idling:

Can be prone to rough idling or stalling if not maintained, may require periodic cleaning and adjustment.

Clutch Slippage:

Can occur with excessive use or worn clutch plates, requiring adjustment or replacement.

Suspension Wear:

Fork seals can wear over time, leading to oil leaks; rear shock absorber may lose damping effectiveness.

Electrical Connections:

Corrosion on electrical connectors can cause intermittent faults, particularly in off-road environments.

Valve Adjustment:

Requires periodic adjustment to maintain optimal engine performance and prevent damage.

📚 Vehicle History

Brand Focus:

Yamaha Motor Company is a renowned Japanese manufacturer of motorcycles, marine products, and musical instruments, with a strong heritage in motorsports.

Tt R Series Positioning:

The TT-R line represents Yamaha's commitment to accessible, trail-focused off-road motorcycles, building on decades of experience in enduro and motocross.

Production Years:

The TT-R225 was produced from 1998 through 2004, with the 'L' designation often indicating a variation like electric start or slightly different features.

Manufacturing Location:

Likely manufactured in Japan or other Yamaha global facilities.

🏆 Awards & Recognition

Model Awards:

While specific awards for the 2003 TT-R225 are not prominently documented, the TT-R series has consistently been recognized for its reliability and suitability for beginner to intermediate riders in the dual-sport category.