Yamaha YZ125M2 YZ125 2021 Owner's Manual

Yamaha YZ125M2 YZ125 2021 manual cover
Pages 268
Year 2021
Language(s)
English en

Yamaha YZ125M2 YZ125 2021 Specification

The Yamaha YZ125M2 YZ125 2021 is a high-performance motocross bike designed for competitive riders seeking agility and power. At its core is a liquid-cooled 124cc 2-stroke engine, featuring Yamaha’s Power Valve System (YPVS) which provides a broad powerband and robust mid-range torque. The engine is paired with a 6-speed transmission, optimizing power delivery and enhancing control across diverse terrains.

The YZ125M2 features a lightweight aluminum chassis that ensures rigidity and balance, contributing to superior handling and responsiveness. The suspension system comprises fully adjustable KYB® front and rear shocks, offering precise tuning for varied track conditions and rider preferences. The front suspension includes a 48mm inverted fork, while the rear utilizes a monocross system with a linkage-type design, ensuring stable and consistent performance.

Ergonomically, the YZ125M2 is designed for maximum rider comfort and control. The bike has a flat seat, slim bodywork, and a narrow fuel tank, allowing seamless rider movement and improved maneuverability. Its 1.8-gallon fuel tank provides ample capacity for extended riding sessions without compromising on weight distribution.

Braking is managed by a powerful system with a 270mm front disc and a 240mm rear disc, ensuring reliable stopping power and enhanced safety. The wheels are fitted with lightweight Excel® rims, coupled with high-traction Dunlop® Geomax® MX3S tires for optimal grip on various surfaces.

The Yamaha YZ125M2 YZ125 2021 also incorporates advanced electronics with a digital CDI ignition system, ensuring precise spark timing and optimal engine performance. The bike’s aggressive styling, featuring dynamic graphics and a sleek design, reflects its competitive nature and Yamaha’s commitment to quality and performance. Overall, the YZ125M2 stands out as a top-tier choice for serious motocross enthusiasts aiming for peak performance and reliability.

Yamaha YZ125M2 YZ125 2021 F.A.Q.

What is the recommended break-in procedure for the Yamaha YZ125M2 2021?

To break in your Yamaha YZ125M2 2021, start by warming up the engine and riding at low to moderate speeds for approximately 30 minutes. Avoid full throttle and high RPMs during this period. Gradually increase the speed and load over the next few hours of operation. Check and adjust the chain tension, and ensure all bolts and fasteners are secure after the initial break-in period.

How do I adjust the carburetor on the Yamaha YZ125M2 2021 for optimal performance?

To adjust the carburetor, first ensure the engine is warm. Start by adjusting the idle screw to set the engine idle speed. Then, adjust the air screw to fine-tune the air-fuel mixture. Turn the air screw in or out until the engine runs smoothly at idle. If needed, adjust the needle position to optimize mid-range performance. Always refer to the service manual for specific settings.

What type of oil should be used for the Yamaha YZ125M2 2021?

The Yamaha YZ125M2 2021 requires high-quality two-stroke engine oil. It's recommended to use a synthetic 2T oil that meets JASO FC or FD standards for optimal performance and protection. Mix the oil with unleaded gasoline at a 32:1 ratio unless otherwise specified by Yamaha.

How often should the air filter be cleaned on the Yamaha YZ125M2 2021?

The air filter on the Yamaha YZ125M2 2021 should be cleaned after every ride, especially in dusty or muddy conditions. Remove the filter, wash it with a non-flammable solvent, let it dry completely, and then apply a good quality air filter oil before reinstalling. Regular maintenance ensures optimal airflow and engine performance.

What are the common signs of a worn-out clutch on the Yamaha YZ125M2 2021?

Common signs of a worn-out clutch include difficulty in shifting gears, a slipping clutch where the engine revs high without a corresponding increase in speed, and unusual noises during gear changes. If you experience any of these symptoms, inspect the clutch plates for wear and replace them if necessary.

How can I troubleshoot a starting issue with the Yamaha YZ125M2 2021?

If the Yamaha YZ125M2 2021 is having trouble starting, check the spark plug for fouling and ensure it's properly gapped. Verify the fuel mixture is correct and the tank has fresh fuel. Inspect the carburetor for blockages and ensure the choke is functioning correctly. If problems persist, consult a professional mechanic.

What is the correct tire pressure for the Yamaha YZ125M2 2021?

For the Yamaha YZ125M2 2021, the recommended tire pressure is typically around 12 psi for the front tire and 12 psi for the rear tire. However, adjust the pressure based on riding conditions, terrain, and personal preference to ensure optimal handling and performance.

How do I maintain the chain on the Yamaha YZ125M2 2021?

Regular chain maintenance involves cleaning the chain with a suitable chain cleaner, inspecting it for wear or damage, and lubricating it with a high-quality chain lube. Check the chain tension and adjust it if necessary, ensuring there is adequate slack as specified in the owner's manual.

What should I do if the Yamaha YZ125M2 2021 overheats during a ride?

If the Yamaha YZ125M2 2021 overheats, stop riding immediately to allow the engine to cool down. Check the coolant level and top it up if necessary. Inspect the radiator for blockages or damage, and ensure the coolant mixture is correct. Avoid riding in extreme conditions without proper cooling system checks.

How often should I change the spark plug on the Yamaha YZ125M2 2021?

The spark plug on the Yamaha YZ125M2 2021 should be inspected every 10 hours of riding and replaced if any signs of wear or fouling are present. Regular replacement ensures efficient combustion and optimal engine performance. Use the recommended spark plug type and gap specified by Yamaha.