Yamaha TT-R125LE B 2014 Owner's Manual

It is recommended to change the oil every 6 months or every 1,000 miles, whichever comes first. Regular oil changes help maintain engine performance and longevity.
For optimal performance, use Yamalube 4, 10W-40 or a similar high-quality oil designed for 4-stroke engines. Ensure it meets or exceeds the specifications set by Yamaha.
First, ensure the bike is on a stand. Loosen the rear axle nut, adjust the chain tension using the adjusters, and then retighten the axle nut. The ideal chain slack is about 1.2 to 1.6 inches.
The recommended tire pressure is 15 psi for the front tire and 15 psi for the rear tire. Always check tire pressure before riding to ensure safety and optimal handling.
Remove the air filter cover, take out the filter, and clean it with a mild detergent and water. Let it dry completely, then apply air filter oil before reinstalling.
Check the fuel level, ensure the kill switch is off, inspect the spark plug for wear or fouling, and verify the battery is charged. If it still doesn't start, consult a professional mechanic.
Remove the spark plug cap, use a spark plug socket to unscrew the old plug, and install a new one. Ensure it is properly gapped and tightened to the correct torque specifications.
Clean the bike thoroughly, change the oil, add a fuel stabilizer, disconnect the battery, and store it in a dry place. Elevate the bike to prevent tire deformation.
Adjust the preload on the rear shock absorber and the fork compression settings to match your riding style and weight. Refer to the owner’s manual for specific adjustment procedures.
Clean the bike thoroughly to remove mud and debris, check and lubricate the chain, inspect the brakes for wear, and ensure the air filter is clean. Regular maintenance after muddy rides prevents long-term damage.