Yamaha TT-R125EV, TT-R125LV, TT-R125LEV 2006 Owner's Manual

The recommended oil type for these models is SAE 10W-30 or 10W-40 with an API service classification of SG or higher.
It is recommended to change the oil every 1000 km (600 miles) or every 6 months, whichever comes first.
The correct spark plug type for these models is NGK CR7HSA or equivalent.
To adjust the chain tension, place the bike on a stand, loosen the axle nut, and adjust the chain adjusters evenly on both sides until the chain has about 1.2 inches (30 mm) of slack in the middle. Tighten the axle nut to secure.
The fuel capacity for these models is approximately 1.74 gallons (6.6 liters).
First, check the fuel supply and ensure there is enough fuel in the tank. Verify the spark plug is clean and properly gapped. Check the battery charge and connections. If the issue persists, consult a professional mechanic.
For the front tire, the correct pressure is 15 psi (103 kPa) and for the rear tire, it is 15 psi (103 kPa).
Remove the air filter cover and take out the air filter. Wash it gently with a mild detergent and water. Allow it to dry completely before applying a light coat of air filter oil and reinstalling it.
Use a high-quality ethylene glycol-based antifreeze coolant designed for aluminum engines. It should be mixed with distilled water at a 1:1 ratio.
Improving performance can include regular maintenance such as cleaning the carburetor, ensuring the air filter is clean, checking the spark plug, and using high-quality fuel. Consider upgrading the exhaust system or tuning the suspension for better performance.