Honda CRF150F 2012 Manual

The recommended oil type for a 2012 Honda CRF150F is SAE 10W-40, Pro Honda GN4 or equivalent motor oil.
You should change the oil every 600 miles or every 6 months, whichever comes first. More frequent changes may be necessary under severe riding conditions.
To adjust the chain tension, first, loosen the rear axle nut. Then, turn the chain adjuster bolts on each side equally to achieve the desired tension, ensuring the chain has about 1-1.5 inches of slack. Finally, tighten the axle nut securely.
The recommended tire pressure for the Honda CRF150F 2012 is 15 psi for the front tire and 15 psi for the rear tire.
To clean the air filter, remove the seat and the air filter cover. Take out the air filter and wash it with a mild, non-flammable solvent. Allow it to dry, then apply air filter oil before reinstalling it.
Common starting problems can include a dead battery, fouled spark plug, or clogged fuel system. Check the battery charge, clean or replace the spark plug, and ensure the fuel is fresh and the fuel lines are clear.
To replace the spark plug, remove the spark plug cap, use a spark plug wrench to remove the old spark plug, and then install a new spark plug. Ensure it is properly gapped and securely tightened.
Before riding, check the oil level, tire pressure, chain tension, and brakes. Ensure the controls and lights are functioning properly and inspect for any fluid leaks.
The CRF150F has non-adjustable suspension. However, you can improve handling by ensuring the fork oil is fresh and by adjusting the rear shock preload if necessary. For more significant tuning, consider aftermarket suspension components.
Valve clearance should be checked and adjusted if necessary every 2000 miles or as specified in the owner's manual, especially if you notice difficulty starting or unusual engine noise.