Yamaha TT-R90N, TT-R90NC 2001 Owner's Manual

Yamaha TT-R90N, TT-R90NC 2001 manual cover

Pages 134

Year 2001

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of 134

Yamaha TT-R90N, TT-R90NC 2001 Specification

The Yamaha TT-R90N, TT-R90NC 2001 is a small, off-road motorcycle engineered for youth riders, combining user-friendly features with reliable performance. It is powered by an air-cooled, 4-stroke, single-cylinder engine with a displacement of 89cc. This engine is mated to a 3-speed automatic-clutch transmission, facilitating easy gear changes and making it an excellent choice for beginners.

The bike's frame is constructed from steel, ensuring durability and stability. The front suspension features a telescopic fork with 110mm of travel, while the rear suspension is a monocross system offering 90mm of travel, providing a comfortable ride across various terrains. The TT-R90N's braking system includes drum brakes on both the front and rear wheels, ensuring reliable stopping power.

With a seat height of 558mm and a ground clearance of 152mm, the TT-R90N is designed to accommodate young riders while maintaining adequate clearance for off-road adventures. The fuel tank has a capacity of 5.5 liters, offering a decent range for extended riding sessions. The bike's dry weight is approximately 60 kg, making it lightweight and manageable for kids.

The Yamaha TT-R90N, TT-R90NC 2001 also includes safety features such as a keyed ignition switch and handlebar-mounted controls for easy access. The styling is characterized by Yamaha's signature blue and white color scheme, giving it an attractive and sporty appearance. Overall, the TT-R90N is a well-rounded entry-level off-road motorcycle, combining ease of use, safety, and durability to deliver an enjoyable riding experience for young enthusiasts.

Yamaha TT-R90N, TT-R90NC 2001 F.A.Q.

What is the recommended oil type for the Yamaha TT-R90N, TT-R90NC 2001?

The recommended oil type for the Yamaha TT-R90N, TT-R90NC 2001 is SAE 10W-40, which is suitable for all temperatures. Make sure to use a high-quality 4-stroke motorcycle oil.

How often should I change the oil on my Yamaha TT-R90N, TT-R90NC 2001?

The oil should be changed every 6 months or every 1,000 km (600 miles), whichever comes first. Regular oil changes help maintain engine performance and longevity.

What is the correct tire pressure for the front and rear tires of the Yamaha TT-R90N, TT-R90NC 2001?

The correct tire pressure for the front tire is 15 psi (103 kPa) and for the rear tire is 15 psi (103 kPa). Proper tire pressure ensures optimal performance and safety.

How do I adjust the chain tension on the Yamaha TT-R90N, TT-R90NC 2001?

To adjust the chain tension, first loosen the axle nut. Then, adjust the chain tensioner bolts evenly on both sides until the chain has about 1.2-1.6 inches (30-40 mm) of slack. Finally, retighten the axle nut securely.

What spark plug type is recommended for the Yamaha TT-R90N, TT-R90NC 2001?

The recommended spark plug for the Yamaha TT-R90N, TT-R90NC 2001 is NGK CR7HSA. Ensure the spark plug gap is set to 0.6-0.7 mm (0.024-0.028 inches) for optimal performance.

How do I clean the air filter on my Yamaha TT-R90N, TT-R90NC 2001?

To clean the air filter, remove it from the airbox. Wash it gently with a mild detergent and water, then let it dry completely. Once dry, apply air filter oil evenly before reinstalling.

What are the common troubleshooting steps if the Yamaha TT-R90N, TT-R90NC 2001 won't start?

If the bike won't start, check the fuel level, ensure the fuel valve is open, inspect the spark plug for fouling, and verify the battery is charged. Additionally, make sure the kill switch is set to 'run'.

How do I properly store the Yamaha TT-R90N, TT-R90NC 2001 for the winter?

To store the bike for the winter, perform an oil change, fill the fuel tank and add a fuel stabilizer, disconnect the battery, and cover the bike to protect it from dust and moisture. Store in a cool, dry place.

What is the correct procedure for breaking in a new Yamaha TT-R90N, TT-R90NC 2001 engine?

During the first 10 hours or 160 km (100 miles), avoid prolonged operation above 1/3 throttle, vary the engine speed, and avoid full-throttle operation to ensure a proper engine break-in.

How often should I inspect the brakes on my Yamaha TT-R90N, TT-R90NC 2001?

Inspect the brakes every 3 months or 500 km (300 miles), whichever comes first. Check for pad wear, fluid levels, and any signs of leakage to ensure safe operation.