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General| Engine Type | Liquid-cooled, 4-stroke, SOHC, 4-valve |
|---|---|
| Displacement | 124.7cc |
| Bore x Stroke | 52.0 mm x 58.6 mm |
| Compression Ratio | 11.2:1 |
| Fuel System | Fuel Injection |
| Ignition System | TCI |
| Transmission | Constant mesh, 6-speed |
| Final Drive | Chain |
| Front Suspension | Telescopic forks |
| Front Brake | Single disc |
| Rear Brake | Single disc |
| Seat Height | 870 mm |
| Wet Weight | 137 kg |
| Lubrication System | Wet sump |
| Starter System | Electric |
| Front Brake Diameter | 298 mm |
| Rear Brake Diameter | 220 mm |
| Overall Width | 835 mm |
| Overall Height | 1, 165 mm |
| Wheel Base | 1, 430 mm |
| Rear Suspension | Swingarm (link suspension) |
| Maximum Power | 11.0 kW (15.0 PS) @ 9, 000 rpm |
| Maximum Torque | 12.2 Nm (1.24 kg-m) @ 8, 000 rpm |
| Oil Tank Capacity | 1.15 L |
Owner's responsibility for safe operation and proper maintenance.
Pre-operation checks, visibility, and hazard avoidance for safe riding.
Essential protective gear like helmets, jackets, and boots for safety.
Risks of inhaling exhaust fumes and preventive measures.
Guidelines for adding cargo and accessories to the motorcycle safely.
Information about choosing and using genuine Yamaha accessories.
Considerations for aftermarket tires and rims matching vehicle performance.
Diagram and identification of components on the left side of the WR125R.
Diagram and identification of components on the right side of the WR125R.
Diagram and identification of handlebar controls and instrument panel features.
Operation and locking mechanisms of the main switch and steering lock.
Explanation of the various indicator and warning lights on the instrument panel.
Features and operation of the digital multi-function display.
Description and operation of controls located on the left and right handlebars.
Location and operation of the clutch lever.
Location and function of the shift pedal for changing gears.
Location and operation of the front brake lever.
Location and operation of the rear brake pedal.
Procedure for removing and installing the fuel tank cap.
Guidelines for safe refueling and recommended fuel type.
Information about the vehicle's catalytic converter and safety precautions.
Instructions for removing and installing the motorcycle seat.
Procedure for adjusting the rear shock absorber spring preload.
Location and operation of the sidestand and its safety switch.
Explanation of the system preventing starting or stopping the engine.
Procedure to check the proper functioning of the ignition circuit cut-off system.
Check fuel level, refuel if necessary, and inspect fuel line.
Check oil level, add oil if necessary, and inspect for leakage.
Check coolant level, add coolant if necessary, and inspect cooling system.
Check operation, pads, fluid level, and hydraulic system.
Check operation, pads, fluid level, and hydraulic system.
Check operation and adjust lever free play.
Check chain slack, alignment, condition, and lubricate.
Check for damage, tread depth, and tire pressure.
Check operation of the ignition circuit cut-off system.
Check fluid level and fill with distilled water if necessary.
Conditions and steps required to start the engine safely.
How to use the shift pedal and clutch lever to change gears smoothly.
Guidelines for the initial 1000 km to ensure proper engine wear.
Advice on riding style to improve fuel efficiency.
Safe procedures for stopping the engine and parking the motorcycle.
Location and purpose of the owner's tool kit for basic maintenance.
Schedule for checks and maintenance of emission control components.
Overview of regular maintenance tasks and lubrication intervals.
Checking wheel bearings for looseness or damage.
Checking bearing play and steering for roughness.
Checking front fork operation and for oil leakage.
Checking shock absorber operation and for oil leakage.
Checking coolant level and vehicle for coolant leakage.
Checking operation and adjusting headlight beam.
Instructions for removing and installing body panels for maintenance access.
Procedure for checking the spark plug's condition and gap.
Checking engine oil level and changing oil/filter element.
Checking coolant level and changing coolant.
Procedure for changing the coolant, with safety warnings.
Instructions for replacing the air filter and cleaning the check hose.
Procedure for checking and adjusting the engine idling speed.
Procedure for checking and adjusting the throttle cable free play.
Information on valve clearance adjustment intervals and procedure.
Importance of proper tire air pressure and checking tires before riding.
Tire air pressure specifications based on load conditions.
Procedure for checking tire condition, tread depth, and damage.
Specifications for front tire size, manufacturer, and model.
Specifications for rear tire size, manufacturer, and model.
Checking wheel rims and spokes, and wheel balancing after tire changes.
Procedure for checking and adjusting the clutch lever free play.
Procedure for checking the front brake lever free play.
Procedure for checking and adjusting the brake pedal free play.
Procedure for checking brake pad wear using indicator grooves.
Procedure for checking brake fluid level and replenishing if necessary.
Recommendation for dealer to change brake fluid and brake hoses.
Detailed steps for adjusting drive chain slack and ensuring wheel alignment.
Steps for cleaning and lubricating the drive chain to prevent wear.
Checking control cables and lubricating them if necessary.
Checking throttle grip operation and lubricating the cable.
Checking lever operation and lubricating pivot points.
Checking brake pedal operation and lubricating the pedal pivot.
Checking sidestand operation and lubricating pivot points.
Lubrication of the swingarm pivots at specified intervals.
Checking the condition and operation of the front fork.
Checking for worn or loose steering bearings to prevent danger.
Checking front and rear wheel bearings for play or smooth rotation.
Checking electrolyte level and battery connections.
Procedure for replacing blown fuses with the correct amperage.
Instructions for replacing a burnt-out headlight bulb.
Instructions for replacing the tail/brake light bulb.
Instructions for replacing a burnt-out turn signal light bulb.
Instructions for replacing the license plate light bulb.
Instructions for replacing a burnt-out auxiliary light bulb.
Precautions for safely supporting the motorcycle during maintenance.
Steps to lift the front wheel off the ground for servicing.
Procedure for removing the front wheel from the motorcycle.
Procedure for installing the front wheel onto the motorcycle.
Procedure for removing the rear wheel from the motorcycle.
Procedure for installing the rear wheel onto the motorcycle.
Quick procedures for checking vital systems and common operational problems.
Diagnostic charts for starting problems or poor engine performance.
Warning and procedure for dealing with engine overheating issues.
Importance of regular care for appearance, longevity, and performance.
Guidelines for cleaning plastic parts and avoiding harsh chemicals.
Procedure for cleaning the motorcycle after normal use.
Steps to dry and polish the motorcycle after cleaning.
Guidelines for short-term and long-term storage of the motorcycle.
Steps for preparing the motorcycle for storage over several months.
Overall dimensions, wheelbase, ground clearance, and turning radius.
Engine type, arrangement, displacement, bore, stroke, and compression ratio.
Coolant reservoir and radiator capacities.
Recommended fuel type, tank capacity, and reserve amount.
Manufacturer, model, and gap specification for the spark plug.
Primary and secondary reduction systems, and transmission type.
Tire air pressure specifications based on load conditions.
Specifications for front wheel type and rim size.
Specifications for rear wheel type and rim size.
Type, operation, and recommended fluid for the front brake.
Type, operation, and recommended fluid for the rear brake.
Type and travel specifications for the front suspension.
Type and travel specifications for the rear suspension.
Information on ignition system, charging system, and battery.
Specifications for main, headlight, ignition, and other fuses.
Record key, vehicle identification numbers, and model label information.
Location and purpose of the vehicle identification number.
Location and purpose of the model label for ordering spare parts.
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