Yamaha YZ125K2 YZ125 2019 Owner's Manual

Yamaha YZ125K2 YZ125 2019 manual cover
Pages 236
Year 2019
Language(s)
English en

Yamaha YZ125K2 YZ125 2019 Specification

The Yamaha YZ125K2 YZ125 2019 is a high-performance motocross bike engineered for competitive racing and advanced riders. Featuring a 124cc liquid-cooled, reed-valve inducted two-stroke engine, the bike delivers exceptional power and responsiveness. The engine is paired with a six-speed, close-ratio transmission, allowing for precise control and optimal performance across varying terrains. The YZ125K2's lightweight aluminum frame enhances agility and handling, making it adept at navigating challenging tracks.

Suspension duties are handled by a fully adjustable KYB® Speed-Sensitive System fork at the front and a fully adjustable KYB® shock at the rear, ensuring superior shock absorption and stability. The braking system includes a 270mm front disc and a 245mm rear disc, providing robust stopping power. The bike's ergonomics are designed for rider comfort and control, with a flat seat and slender bodywork facilitating ease of movement during aggressive riding.

The Yamaha YZ125K2 YZ125 2019 features a 1.8-gallon fuel tank, a 21-inch front wheel, and a 19-inch rear wheel, both fitted with Dunlop® Geomax MX3S tires for optimal traction. A digital CDI ignition system offers reliable performance and easy maintenance. A high-compression cylinder head enhances engine efficiency, while the power valve system (YPVS) optimizes power delivery across the RPM range.

Weighing in at approximately 207 pounds (wet), the YZ125K2 maintains a competitive edge with its lightness and advanced engineering. The bike's aesthetics are characterized by Yamaha's iconic blue and white color scheme, complemented by modern graphics. With its combination of power, agility, and durability, the Yamaha YZ125K2 YZ125 2019 stands as a top choice for serious motocross enthusiasts.

Yamaha YZ125K2 YZ125 2019 F.A.Q.

What type of oil should I use for the Yamaha YZ125K2 YZ125 2019?

For the Yamaha YZ125K2 YZ125 2019, it is recommended to use a high-quality 2-stroke engine oil. Yamaha's own 2-stroke oil or any other reputable brand that meets the JASO-FC or ISO-L-EGD standards is suitable.

How often should I change the transmission oil on a Yamaha YZ125K2 YZ125 2019?

It is advisable to change the transmission oil every 10 hours of riding or after every 2-3 race events. Regular oil changes ensure optimal performance and longevity of the transmission components.

What is the correct spark plug gap for the Yamaha YZ125K2 YZ125 2019?

The correct spark plug gap for the Yamaha YZ125K2 YZ125 2019 is 0.7 to 0.8 mm (0.028 to 0.031 inches). Always use a feeler gauge to check and adjust the gap to ensure proper ignition.

How can I troubleshoot starting issues with my Yamaha YZ125K2 YZ125 2019?

To troubleshoot starting issues, check the fuel supply, inspect the spark plug for fouling, ensure the kill switch is not engaged, and verify that the carburetor is clean. A compression test can also help diagnose engine health.

What is the recommended tire pressure for the Yamaha YZ125K2 YZ125 2019?

The recommended tire pressure for the Yamaha YZ125K2 YZ125 2019 is typically around 12 psi for the front tire and 12 psi for the rear tire. Adjustments may be needed based on terrain and rider preference.

How do I properly clean and maintain the air filter on my Yamaha YZ125K2 YZ125 2019?

To clean the air filter, remove it from the bike, wash it with a filter cleaner or mild soap, rinse thoroughly, and let it dry completely. Apply a thin layer of air filter oil before reinstalling. Regular maintenance is crucial for performance and engine protection.

What are the torque specifications for the Yamaha YZ125K2 YZ125 2019 cylinder head bolts?

The torque specification for the cylinder head bolts on the Yamaha YZ125K2 YZ125 2019 is typically 20 Nm (14.5 lb-ft). Always refer to the service manual for specific details and use a calibrated torque wrench.

How can I adjust the suspension settings on my Yamaha YZ125K2 YZ125 2019 for better handling?

To adjust the suspension, start by setting the sag according to your weight. Adjust the rebound and compression settings on the forks and shock absorber to match your riding style and terrain conditions. Fine-tune these settings after test rides for optimal handling.

What are common signs of clutch wear on the Yamaha YZ125K2 YZ125 2019 and how do I address them?

Common signs of clutch wear include slipping, difficulty shifting, and a spongy feel at the lever. To address these, inspect the clutch plates and springs for wear and replace them if necessary. Ensure proper cable adjustment and lubrication.

How should I store my Yamaha YZ125K2 YZ125 2019 during the off-season?

To store your Yamaha YZ125K2 YZ125 2019 during the off-season, clean the bike thoroughly, drain the fuel or add a fuel stabilizer, lubricate moving parts, and remove or maintain the battery. Store in a cool, dry place and cover with a motorcycle cover.