Yamaha YZ125T1 2005 Owner's Manual

The recommended fuel mix ratio for the Yamaha YZ125T1 2005 is 32:1 (32 parts fuel to 1 part oil).
The air filter should be cleaned after every ride in dusty conditions or after every 2-3 rides in less severe conditions.
The recommended spark plug for the YZ125T1 is NGK BR9EG.
Check the spark plug for fouling, ensure the fuel is fresh, verify the kill switch is in the run position, and inspect the carburetor for blockages.
The recommended tire pressure is 12 psi for the front tire and 12 psi for the rear tire, but this can vary based on terrain and rider preference.
To adjust the suspension, start by setting the sag, then adjust the compression and rebound damping according to your riding style and terrain. Consult the owner's manual for specific settings.
Regular maintenance includes cleaning the air filter every ride, changing the transmission oil every 10 hours of operation, and checking the chain, brakes, and tires before each ride.
Ensure the radiator is free of obstructions, maintain proper coolant levels, and avoid prolonged idling in hot conditions.
Inspect the clutch plates for wear and replace them if necessary. Also, check the clutch cable for proper adjustment.
Consider upgrading the exhaust system, fine-tuning the carburetor, and optimizing the suspension settings for your specific riding conditions.