Yamaha YZ125B 2012 Owner's Manual

Yamaha YZ125B 2012 manual cover
Pages 236
Year 2012
Language(s)
English en

Yamaha YZ125B 2012 Specification

The Yamaha YZ125B 2012 is a high-performance motocross bike engineered for competitive racing and designed to deliver superior agility and power. It features a liquid-cooled, 124cc, two-stroke, single-cylinder engine equipped with Yamaha's Power Valve System (YPVS) for enhanced mid-range power and torque. The engine is paired with a six-speed transmission that provides smooth and precise gear shifts, optimizing performance across various terrains.

The YZ125B's frame is constructed from lightweight aluminum, contributing to its overall weight of approximately 207 pounds, which allows for exceptional maneuverability and control. The suspension system includes a fully adjustable, KYB Speed-Sensitive System fork at the front, and a fully adjustable KYB rear shock, both designed to provide optimal damping and handling characteristics. The bike rides on 21-inch front and 19-inch rear wheels, fitted with high-traction tires suitable for diverse track conditions.

Braking performance is ensured by a 250mm disc brake at the front and a 245mm disc brake at the rear, offering reliable stopping power. The YZ125B also features ergonomically designed handlebars and a narrow fuel tank to facilitate better rider movement and comfort during aggressive riding. The bike's overall design is complemented by its distinctive Yamaha blue and white color scheme, which underscores its racing pedigree.

In summary, the Yamaha YZ125B 2012 is a finely tuned motocross machine that combines robust engine performance, lightweight construction, advanced suspension, and reliable braking to meet the demands of competitive riders. Its design and engineering reflect Yamaha's commitment to producing high-quality, race-ready motorcycles.

Yamaha YZ125B 2012 F.A.Q.

What is the recommended tire pressure for the Yamaha YZ125B 2012?

The recommended tire pressure for the Yamaha YZ125B 2012 is typically 12-15 psi for both front and rear tires, depending on the terrain and rider preference.

How often should I change the transmission oil in my Yamaha YZ125B 2012?

It is recommended to change the transmission oil every 10-15 hours of riding to ensure optimal performance and longevity of your Yamaha YZ125B 2012.

What type of spark plug should I use for a Yamaha YZ125B 2012?

For the Yamaha YZ125B 2012, use an NGK BR9EG or a similar high-performance spark plug. Always check the gap before installation.

How do I adjust the chain tension on my Yamaha YZ125B 2012?

To adjust the chain tension on your Yamaha YZ125B 2012, first loosen the axle nut, adjust the chain adjusters evenly on both sides, ensuring the chain has about 1-1.5 inches of slack, and then retighten the axle nut.

What is the correct fuel mixture for the Yamaha YZ125B 2012?

The correct fuel mixture for the Yamaha YZ125B 2012 is 32:1 (32 parts fuel to 1 part two-stroke oil) for optimal engine performance.

How can I troubleshoot a Yamaha YZ125B 2012 that won't start?

If your Yamaha YZ125B 2012 won't start, check for fuel delivery, ensure the spark plug is clean and functioning, verify the kill switch is in the correct position, and check the carburetor for clogs.

What maintenance steps should be taken before storing a Yamaha YZ125B 2012 for an extended period?

Before storing your Yamaha YZ125B 2012, clean the bike thoroughly, drain the fuel tank, change the oil, lubricate all moving parts, disconnect the battery, and store the bike in a dry, covered area.

How do I replace the air filter on the Yamaha YZ125B 2012?

To replace the air filter, remove the seat, unscrew the airbox cover, take out the old filter, and install a new, properly oiled filter. Ensure the new filter is seated correctly before replacing the cover and seat.

What are the signs of a worn-out clutch on a Yamaha YZ125B 2012?

Signs of a worn-out clutch include difficulty shifting gears, a slipping clutch, a burning smell, or a change in lever feel. If you notice these symptoms, inspect and potentially replace the clutch plates.

How can I improve the suspension performance on my Yamaha YZ125B 2012?

To improve suspension performance, adjust the fork and shock settings according to your weight and riding style, ensure proper sag, and consider upgrading to higher-quality springs or dampers if necessary.