Yamaha YZ125Y 2009 Owner's Manual

Yamaha YZ125Y 2009 manual cover
Pages 234
Year 2009
Language(s)
English en

Yamaha YZ125Y 2009 Specification

The Yamaha YZ125Y 2009 is a high-performance motocross motorcycle designed for competitive racing and advanced off-road riding. At its core, the YZ125Y features a powerful 124cc, liquid-cooled, two-stroke engine that delivers responsive acceleration and high-revving power, making it ideal for intense racing scenarios. The engine is paired with a six-speed, close-ratio transmission that provides smooth and precise shifting, enabling riders to maintain optimal speed and control across varying terrains.

The lightweight aluminum frame of the YZ125Y ensures superior agility and handling, enhancing the bike's overall performance on the track. The front suspension system is equipped with fully adjustable 48mm KYB Speed-Sensitive System forks, offering exceptional damping and responsiveness. The rear suspension features a fully adjustable KYB shock with a specialized linkage system, delivering excellent traction and stability.

Braking performance is ensured by a robust system comprising a 250mm front disc brake and a 245mm rear disc brake, both providing reliable stopping power under high-speed conditions. The bike also includes a race-inspired, ergonomic design with a flat seat and narrow bodywork, allowing for improved rider movement and control.

The Yamaha YZ125Y 2009 is fitted with a high-capacity radiator that ensures efficient cooling during prolonged, demanding rides. Additionally, the bike comes with a large 2.1-gallon fuel tank, designed to offer extended riding periods without frequent refueling. The combination of advanced engineering, lightweight construction, and superior handling characteristics makes the Yamaha YZ125Y 2009 a standout choice for professional and amateur motocross riders alike.

Yamaha YZ125Y 2009 F.A.Q.

What is the recommended tire pressure for the Yamaha YZ125Y 2009?

The recommended tire pressure for the Yamaha YZ125Y 2009 is typically 12-15 psi for the rear tire and 13-15 psi for the front tire, depending on the terrain and riding conditions.

How often should the air filter be cleaned on a Yamaha YZ125Y 2009?

For optimal performance, the air filter should be cleaned after every ride in dusty conditions or after every 3-4 rides in normal conditions.

What type of oil is recommended for the Yamaha YZ125Y 2009 transmission?

It is recommended to use a high-quality 10W-40 or 10W-30 transmission oil specifically designed for two-stroke engines.

How do I properly adjust the chain on my Yamaha YZ125Y 2009?

To adjust the chain, ensure there is about 1-1.5 inches of slack when the bike is on a stand. Loosen the axle nut, adjust the chain tension with the adjusters, and retighten the axle nut securely.

What is the correct spark plug gap for the Yamaha YZ125Y 2009?

The correct spark plug gap for the Yamaha YZ125Y 2009 should be set to 0.7-0.8 mm (0.028-0.031 inches).

How can I troubleshoot ignition problems on my Yamaha YZ125Y 2009?

Start by checking the spark plug for fouling or wear, inspect the ignition coil, and ensure all electrical connections are secure. If the problem persists, consult a professional mechanic.

What maintenance should be performed regularly on the Yamaha YZ125Y 2009 suspension?

Regularly inspect the fork seals for leaks, check suspension settings, and ensure the linkage bearings are lubricated and in good condition. Consider professional service every 20-30 hours of riding.

How do I bleed the brakes on a Yamaha YZ125Y 2009?

To bleed the brakes, attach a clear hose to the brake caliper bleeder valve, pump the brake lever, open the bleeder valve to release air and fluid, close the valve, and repeat until air bubbles are gone. Ensure the brake fluid reservoir remains full.

What is the recommended procedure for winterizing the Yamaha YZ125Y 2009?

To winterize, thoroughly clean the bike, drain the fuel system or add a fuel stabilizer, lubricate moving parts, remove the battery and store it in a cool, dry place, and cover the bike to protect it from the elements.

How can I improve the performance of my Yamaha YZ125Y 2009?

Improving performance can involve installing a high-performance exhaust, re-jetting the carburetor for optimal air-fuel mixture, upgrading the suspension components, and regularly maintaining the engine for peak efficiency.