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General| Displacement | 124cc |
|---|---|
| Bore x Stroke | 54.0mm x 54.5mm |
| Compression Ratio | 8.6~10.7:1 |
| Fuel Delivery | Mikuni® TMX 38 |
| Ignition | CDI |
| Final Drive | Chain |
| Front Suspension | KYB® Speed-Sensitive System inverted fork; fully adjustable, 11.8-in travel |
| Front Brake | Hydraulic single disc brake, 250mm |
| Rear Brake | Hydraulic single disc brake, 245mm |
| Front Tire | 80/100-21 |
| Rear Tire | 100/90-19 |
| Width | 32.6 in |
| Wheelbase | 56.8 in |
| Fuel Capacity | 2.1 gal |
| Wet Weight | 207 lb |
| Engine Type | Liquid-cooled, 2-stroke |
| Transmission | 6-speed |
| Rear Suspension | KYB® single shock; fully adjustable, 12.4-in travel |
| Rake (Caster Angle) | 27.5 degrees |
Details critical warnings and precautions for operating the vehicle.
Details the location and importance of the VIN.
Recommends using Yamaha genuine parts for replacements.
Describes the operation of the engine stop switch.
Explains the function and operation of the clutch lever.
Details the operation of the shift pedal for gear changes.
Describes the procedure for using the kickstarter lever.
Explains the operation of the throttle grip for speed control.
Describes the operation of the front brake lever.
Explains the operation of the rear brake pedal.
Details the function and positions of the fuel cock.
Explains the operation of the starter knob for cold starts.
Covers procedures for starting the engine and initial break-in.
Outlines steps for starting the engine when cold.
Provides instructions for starting the engine when warm.
Details the necessary steps for engine break-in.
Lists key maintenance tasks required after the break-in period.
Provides overall technical specifications for the vehicle.
Lists specific torque values for engine fasteners.
Lists specific torque values for chassis fasteners.
Lists specific torque values for electrical component fasteners.
Provides general guidelines and specifications for torque application.
Presents a schedule for regular inspection and maintenance tasks.
Details essential checks and maintenance before operating the vehicle.
Provides instructions for checking and maintaining coolant levels.
Details how to adjust the clutch lever's position.
Provides instructions for changing the transmission oil.
Introduces engine tuning concepts and procedures.
Details the procedure for draining and replacing engine coolant.
Explains how to adjust the free play in the clutch lever.
Explains the procedure for cleaning and maintaining the air filter.
Explains the importance and process of carburetor settings.
Provides steps for adjusting the throttle grip's free play.
Details how to check the transmission oil level.
Provides steps for bleeding the hydraulic brake system.
Covers inspection and replacement of front brake pads.
Covers inspection of the drive chain length and stiffness.
Details inspection of the front fork's action and oil leakage.
Provides steps for adjusting the rear shock absorber spring preload.
Covers inspection of wheel runout and bearings.
Details lubrication points and procedures for smooth component operation.
Covers procedures for removing and installing front and rear wheels.
Covers factors for adjusting the front fork performance.
Troubleshooting guide for front fork suspension symptoms.
Troubleshooting guide for rear shock absorber suspension symptoms.
Details how to adjust the front brake lever position.
Details inspection and replacement of rear brake pads.
Provides instructions for checking the brake fluid level.
Provides steps for adjusting the drive chain slack.
Explains how to adjust the rear shock rebound damping.
Provides steps for checking and adjusting the steering head.
Explains how to adjust the rear brake pedal height.
Details adjustment of low compression damping on rear shock.
Explains adjustment of high compression damping on rear shock.
Explains how to adjust the rebound damping force.
Covers checking and adjusting tire pressure.
Covers factors for adjusting the rear suspension performance.
Details how to adjust the compression damping force.
Covers inspection of the spark plug for condition and gap.
Illustrates electrical components and shows the wiring diagram.
Details how to check and adjust the ignition timing.
Details the procedure for removing the carburetor and reed valve.
Covers the steps for disassembling the carburetor.
Covers the installation procedure for the carburetor.
Covers inspection and cleaning of the carburetor body.
Provides steps for assembling the carburetor components.
Provides steps for measuring and adjusting fuel level.
Details the procedure for removing the cylinder head and cylinder.
Covers the removal of the piston and power valve assembly.
Covers inspection and measurement of the piston.
Explains how to calculate and check piston clearance.
Details inspection of the piston pin and small end bearing.
Details inspection and measurement of the cylinder head.
Covers inspection and measurement of the piston rings.
Covers inspection of the power valve assembly and its parts.
Covers inspection and measurement of the cylinder bore.
Details the procedure for removing the engine from the chassis.
Provides steps for installing the engine into the chassis.
Details the procedure for removing the crankshaft.
Covers the critical procedure for installing the crankshaft.
Provides critical safety information for handling the shock absorber.
Outlines steps for checking ignition system and spark plug issues.
