Yamaha TT-R125LWR, TT-R125LWER 2003 Owner's Manual

Yamaha TT-R125LWR, TT-R125LWER 2003 manual cover

Pages 242

Year 2003

Language(s)

of 242

Yamaha TT-R125LWR, TT-R125LWER 2003 Specification

The 2003 Yamaha TT-R125LWR and TT-R125LWER are off-road motorcycles designed for both beginner and intermediate riders. These models are powered by a reliable, air-cooled, 124cc, 4-stroke, SOHC engine, delivering a balanced mix of power and efficiency. The engine features a bore and stroke of 54.0mm x 54.0mm, with a compression ratio of 10:1, offering smooth power delivery across various terrains.

The bikes come equipped with a 5-speed constant mesh transmission, providing a versatile range of gearing options suitable for different riding conditions. The front suspension system comprises a telescopic fork with 180mm of travel, while the rear employs a monocross suspension with 168mm of travel. This combination ensures optimal handling and comfort over rough trails.

Braking duties are handled by a hydraulic single disc brake at the front and a mechanical drum brake at the rear, providing reliable stopping power. The TT-R125LWR and TT-R125LWER feature a lightweight steel frame, contributing to the bikes' manageable weight of approximately 83kg (183 lbs), enhancing maneuverability.

The motorcycles are fitted with a 19-inch front wheel and a 16-inch rear wheel, both shod with knobby tires designed for off-road traction. The fuel tank capacity is 6 liters (1.6 gallons), allowing for extended riding sessions without frequent refueling. The seat height of 805mm (31.7 inches) makes the bike accessible to a wide range of riders, while the ground clearance of 295mm (11.6 inches) ensures it can handle rugged terrain.

The TT-R125LWER is distinguished by its electric start system, providing added convenience over the standard kick-start found on the TT-R125LWR. Both models are designed with a focus on durability and ease of maintenance, making them ideal choices for recreational riding and off-road adventures.

Yamaha TT-R125LWR, TT-R125LWER 2003 F.A.Q.

How do I properly adjust the chain tension on my Yamaha TT-R125LWR?

To adjust the chain tension, first, place the bike on a stand so the rear wheel is off the ground. Loosen the rear axle nut and adjust the chain adjusters on both sides equally until the chain has about 1-1.5 inches of slack at its midpoint. Tighten the axle nut and recheck the tension.

What type of oil should I use for my Yamaha TT-R125LWER?

For the Yamaha TT-R125LWER, it is recommended to use a high-quality 10W-40 or 20W-40 four-stroke motorcycle oil, depending on the climate. Ensure the oil meets JASO MA standards for optimal performance.

How often should I clean the air filter on my TT-R125?

The air filter should be cleaned every 20 hours of riding or sooner if you are riding in dusty or muddy conditions. Remove the filter, wash it with a mild detergent, let it dry completely, and apply air filter oil before reinstalling.

What is the proper way to store my Yamaha TT-R125LWR during the off-season?

For off-season storage, clean your motorcycle thoroughly, change the oil, and fill the fuel tank with fresh gasoline and a fuel stabilizer. Disconnect the battery and store it in a cool, dry place. Cover the bike to protect it from dust and moisture.

How can I troubleshoot starting issues with my TT-R125LWER?

If your TT-R125LWER won't start, check the fuel level, ensure the kill switch is in the "run" position, and examine the spark plug for fouling or wear. Test the battery voltage and connections, and inspect the carburetor for blockages.

What is the recommended tire pressure for the Yamaha TT-R125LWR?

The recommended tire pressure for the Yamaha TT-R125LWR is 15 psi for the front tire and 15 psi for the rear tire. Always check the pressure when the tires are cold for an accurate reading.

How do I bleed the brakes on my TT-R125LWER?

To bleed the brakes, first, remove the brake reservoir cap and top up with fresh brake fluid. Attach a clear hose to the bleeder valve and submerge the other end in a container of fluid. Pump the brake lever a few times, hold it down, open the bleeder valve to release air, and then close it. Repeat until air bubbles are no longer visible.

What maintenance should be performed after every ride on the TT-R125?

After each ride, clean the motorcycle to remove dirt and debris, check and lubricate the chain, inspect for any loose bolts or components, and examine the tires for damage or wear. Ensure the air filter is clean, especially after dusty rides.

How can I adjust the suspension on my Yamaha TT-R125LWR for better handling?

To adjust the suspension, you can modify the rear shock preload using the adjuster ring to suit your weight and riding style. Refer to the owner’s manual for specific settings and adjustments to achieve optimal handling and comfort.

What are the signs that my TT-R125LWER's carburetor needs cleaning?

Signs that the carburetor may need cleaning include difficulty starting, erratic idling, reduced fuel efficiency, and poor throttle response. Regular maintenance can prevent these issues by ensuring the carburetor remains clean and functional.