🏷️ Basic Information

Make:

Yamaha

Model:

TT-R90

Year:

2000

Chassis Code:

4BD

Engine Code:

4BD1

👋 Introduction

Target Audience:

Off-road rider, racer, and owner focusing on maintenance and repair.

Competition:

Direct competitor to other small-displacement pit bikes and junior motocross motorcycles of the era, emphasizing ease of use and maintenance for younger riders.

Vehicle Focus:

Entry-level, user-friendly off-road motorcycle designed for recreational riding and youth motocross.

Manual Advantage:

Provides detailed, specific instructions for maintaining and repairing the 2000 TT-R90, empowering owners to perform their own servicing.

📋 Manual Details

Manual Type:

Service Repair Manual / Shop Manual / Workshop Guide

Language:

English

Format:

Print (implied, as no digital format specified)

Page Count:

Undisclosed (as per product information)

📖 Manual Coverage

Engine:

Complete engine disassembly, assembly, tuning, and troubleshooting

Transmission:

Clutch, gearbox, and shifting mechanism repair and adjustment

Fuel System:

Carburetor inspection, cleaning, adjustment, and overhaul

Ignition System:

CDI unit, spark plug, and related components

Cooling System:

Air-cooling system maintenance and inspection

Exhaust System:

Muffler and pipe inspection and maintenance

Frame And Suspension:

Front fork, rear shock absorber, swingarm, and frame inspection

Brakes:

Front and rear brake system maintenance, adjustment, and component replacement

Wheels And Tires:

Spoke tightening, rim inspection, and tire pressure recommendations

Electrical System:

Wiring diagrams, lighting, horn, and basic electrical component troubleshooting

Controls:

Throttle, clutch, and brake lever adjustments

Maintenance:

Scheduled maintenance, lubrication, and general upkeep

Troubleshooting:

Diagnostic procedures for common problems and symptoms

Repair:

Step-by-step repair instructions for all major components

Disassembly Assembly:

Detailed procedures for taking apart and reassembling the motorcycle

Specifications Data:

Torque specifications, clearances, and measurement data

Depth:

Comprehensive, covering detailed mechanical procedures and diagnostics suitable for home mechanics and professional technicians.

📊 Manual Specifications

File Format:

Print

Print Quality:

Professional quality printing, clear diagrams and text.

Binding Type:

Likely stapled or saddle-stitched for a shop manual format.

Paper Type:

Durable paper suitable for workshop environments.

⚙️ Engine Specifications

Engine Type:

Air-cooled, four-stroke, SOHC

Displacement:

88 cc

Bore X Stroke:

50.0 x 45.3 mm

Compression Ratio:

9.7:1

Valve Clearance Intake:

0.04 mm (cold)

Valve Clearance Exhaust:

0.07 mm (cold)

Lubrication System:

Wet sump

Horsepower Est:

Approx. 9-10 HP (estimated, official figures not always provided for this class)

Torque Est:

Approx. 5-6 lb-ft (estimated)

Carburetor Model:

Mikuni VM16

Carburetor Main Jet:

72.5 (typical)

Carburetor Pilot Jet:

17.5 (typical)

Carburetor Needle Jet:

4A13-3 (typical)

Fuel Type:

Unleaded gasoline (minimum 87 octane)

Ignition Type:

CDI (Capacitor Discharge Ignition)

Spark Plug Type:

NGK CR6HSA or equivalent

Spark Plug Gap:

0.6 - 0.7 mm (0.024 - 0.028 in)

Ignition Timing:

Advance (typically ~15-20 degrees BTDC at specified RPM)

🔧 Transmission

Transmission Type:

4-speed constant mesh, semi-automatic (clutch lever operated for starting/stopping)

Clutch Type:

Wet, multi-plate

Gear Ratios:

1st: 2.833, 2nd: 1.706, 3rd: 1.235, 4th: 0.958 (typical ratios, to be confirmed in manual)

Transmission Operation:

No clutch lever required for shifting gears while in motion.

Transmission Fluid Type:

Yamalube 4 (or equivalent SAE 10W-30 API SE, SF, SG, SH, SJ classifying engine oil)

Transmission Fluid Capacity:

0.9 L (0.95 US qt)

📐 Dimensions

Overall Length:

1555 mm (61.2 in)

Overall Width:

735 mm (28.9 in)

Overall Height:

945 mm (37.2 in)

Seat Height:

685 mm (27.0 in)

Wheelbase:

1075 mm (42.3 in)

Dry Weight:

70 kg (154 lbs)

Wet Weight:

Approx. 74 kg (163 lbs)

Fuel Tank Capacity:

4.0 L (1.1 US gal)

Oil Capacity:

0.9 L (0.95 US qt)

🛡️ Safety Features

Safety Standards:

Designed to meet youth riding safety considerations, though specific crash ratings are not applicable.

Brakes:

Front Drum Brake, Rear Drum Brake (typical for this model year/class).

Suspension:

Telescopic front fork, Swingarm rear suspension for stability.

Frame:

Steel cradle frame for durability.

Lighting:

Headlight and taillight for visibility (operates via DC system or stator output).

💡 Technology Features

Infotainment System:

Not applicable; this is a basic off-road motorcycle with no advanced electronic features.

Driver Assistance Features:

Not applicable.

Connectivity Features:

Not applicable.

🔧 Maintenance

Oil Change Interval:

Every 1000 km (600 miles) or 6 months.

Air Filter Cleaning:

Every 500 km (300 miles) or as needed based on dusty conditions.

Spark Plug Check:

Every 1000 km (600 miles).

Valve Adjustment Interval:

Every 3000 km (1800 miles) or annually.

Engine Oil Grade:

SAE 10W-30 API SE, SF, SG, SH, SJ classifying engine oil (e.g., Yamalube 4).

Brake Fluid Type:

DOT 3 or DOT 4 brake fluid (for drum brakes, primarily for lever feel/lubrication, not hydraulic actuation).

Carburetor Jetting:

Can be sensitive to altitude and temperature changes; requires periodic cleaning and adjustment.

Clutch Engagement:

Semi-automatic clutch can sometimes wear out clutch plates prematurely if ridden aggressively or if not properly adjusted.

Chain And Sprockets:

Regular lubrication and tension adjustment are critical for drivetrain longevity.

📚 Vehicle History

Manufacturer:

Yamaha Motor Company is a renowned Japanese manufacturer with a long history in motorcycles, sporting goods, and marine products.

Tt R Series:

The TT-R series represents Yamaha's line of recreational off-road motorcycles, known for their user-friendliness and durability, particularly for younger riders and beginners. The TT-R90 was a successor to smaller displacement models and a precursor to larger TT-R variants.

Production Period:

The TT-R90 was produced from the late 1990s through the early 2000s, with the 2000 model being a key iteration.

🏆 Awards & Recognition

Industry Recognition:

While specific awards for the 2000 TT-R90 are not widely documented, the TT-R series as a whole is recognized for its success in the youth motocross and recreational riding market, praised for its reliability and ease of use.