Motorcycle Segment:
Dual-sport / Adventure-touring motorcycle.
Target Audience:
Riders seeking versatility for on-road commuting and off-road exploration.
Key Competitors 2007:
KTM 690 Enduro, Honda XR650L, Kawasaki KLR650, Suzuki DR650SE.
Engine Type:
Liquid-cooled, four-stroke, SOHC, four-valve single-cylinder.
Fuel Delivery:
Electronic Fuel Injection (EFI) for precise fueling and emissions control.
Chassis Design:
Robust steel frame designed for durability and off-road capability.
Suspension Setup:
Long-travel telescopic front forks and adjustable rear monoshock for varied terrain.
Engine Mechanical:
Complete overhaul, disassembly, assembly, inspection, and adjustment of all engine components.
Fuel System:
Fuel injection system (EFI), fuel pump, injectors, throttle body, fuel tank, fuel lines, and EVAP system.
Cooling System:
Radiator, fan, water pump, coolant hoses, thermostat, and system pressure testing.
Exhaust System:
Exhaust pipes, muffler, catalytic converter, and lambda sensor (oxygen sensor) replacement and inspection.
Transmission Drivetrain:
Clutch operation, gearbox inspection and repair, final drive (chain and sprockets), and oil change procedures.
Electrical System:
Ignition system, starting system, charging system (alternator, regulator/rectifier), lighting, battery, wiring diagrams, and ECU diagnostics.
Suspension System:
Front forks (telescopic, cartridge type), rear shock absorber, linkage, and adjustment procedures.
Braking System:
Front and rear disc brakes, hydraulic system, brake pads, calipers, master cylinders, and bleeding procedures.
Wheel And Tire System:
Wheel bearing inspection and replacement, tire pressure, rim specifications, and spoke tension (if applicable).
Steering System:
Handlebars, steering stem bearings, and lubrication.
Chassis Frame:
Frame inspection, component mounting, and general chassis structure.
Bodywork Fairings:
Removal, installation, and repair of body panels, seats, and accessories.
General Maintenance:
Oil changes, filter replacements, chain adjustment, brake checks, fluid level checks, and general inspections.
Troubleshooting:
Diagnostic procedures for common issues, error code interpretation, and symptom-based troubleshooting guides.
Engine Rebuilding:
Detailed step-by-step instructions for complete engine disassembly, component measurement, and reassembly.
Electrical Diagnostics:
Wiring diagrams, component testing, and fault finding for all electrical systems.
Suspension Adjustment:
Setting up front and rear suspension for optimal performance and rider preference.
Brake System Service:
Brake pad replacement, caliper service, master cylinder overhaul, and brake fluid bleeding.
Efi Tuning:
Diagnosis and potential minor adjustments related to the electronic fuel injection system.
Depth:
Comprehensive, covering everything from basic rider maintenance to complete engine and chassis overhauls. Includes diagnostic procedures, specifications, and torque values for all components.
Engine Type:
Liquid-cooled, four-stroke, SOHC, 4-valve, single-cylinder
Bore X Stroke:
100.0 mm x 84.0 mm
Fuel System:
Mikuni DFI (Digital Fuel Injection) with throttle position sensor (TPS) and idle air control valve (IACV).
Ignition System:
TCI (Transistor Controlled Ignition)
Claimed Horsepower:
Approximately 47 hp @ 6000 rpm (varies by market and tuning)
Claimed Torque:
Approximately 60 Nm (44.3 lb-ft) @ 5250 rpm (varies by market and tuning)
Throttle Body Diameter:
48 mm
Fuel Type:
Unleaded gasoline (91 RON or higher recommended)
Engine Oil Change:
Every 5,000 km (3,000 miles) or 6 months, whichever comes first.
Oil Filter Replacement:
Every 5,000 km (3,000 miles) or annually.
Spark Plug Check Replace:
Check at 10,000 km (6,000 miles), replace as needed.
Air Filter Cleaning Replace:
Clean every 5,000 km (3,000 miles), replace as needed (more frequently in dusty conditions).
Chain Lubrication Adjustment:
Lubricate every 1,000 km (600 miles) or after riding in rain; adjust chain slack every 5,000 km (3,000 miles).
Engine Oil:
Yamalube 4 (or equivalent) SAE 10W-40 API SG or higher, JASO MA certified.
Engine Oil Capacity:
2.1 Liters (with filter change), 1.9 Liters (without filter change).
Coolant:
High-quality ethylene glycol-based coolant, 50% mixture with distilled water.
Brake Fluid:
DOT 4 hydraulic brake fluid.
Transmission Oil:
Same as engine oil: Yamalube 4 (or equivalent) SAE 10W-40 API SG or higher, JASO MA certified.
Common Wear Items:
Chain and sprockets, brake pads, tires, fork seals, and regulator/rectifier (in some cases).
Potential Engine Quirks:
Some units may experience mild vibration at certain RPMs; ensuring proper maintenance is key to longevity.
Efi System Maintenance:
Regular cleaning of the throttle body and checking for vacuum leaks are recommended for optimal EFI performance.
Brand Focus:
Yamaha Corporation, a Japanese multinational corporation, is renowned for its wide range of products, including motorcycles, musical instruments, and audio equipment.
Xt Series Lineage:
The XT series has a long history dating back to the early XT500, a pioneering dual-sport motorcycle. The XT660 builds on this legacy with modern technology and performance enhancements.
Original Production Start:
The XT660 platform was introduced in the early 2000s, with various iterations and updates over the years.
2007 Model Variants:
The 2007 model was available in several variants, including the XT660R (supermoto-styled) and XT660X (dual-sport/enduro).
