How to Change the Oil in a 2009 Honda CRF150F

Shop parts for a 2009 Honda CRF150F Dirt Bike.

If you want to keep your 2009 Honda CRF150F running smoothly and extend its engine life, routine oil changes are essential. This Honda dirt bike uses a simple oil system with a reusable mesh filter, making regular maintenance affordable and easy for do-it-yourselfers. Follow this step-by-step guide crafted exclusively for MotoSport.com to safely and correctly change your bike's engine oil.

Tools and Supplies Needed

  • 10w-30 motorcycle oil (Check your manual for oil amount; you’ll need a little over one quart for the CRF150F1)
  • Oil drain pan
  • 24mm socket and appropriate ratchet (for the drain bolt2)
  • Torque wrench (set to 11 ft-lbs for the drain bolt1)
  • Shop rags or paper towels
  • Funnel
  • Aluminum foil (optional but useful for controlling spills1)
  • Nitrile gloves (optional)

Preparation

  • Run the engine for 3–5 minutes so the oil thins out and flows better.
  • Turn the bike off and let it sit for 2–3 minutes to cool slightly and allow oil to settle in the case4.
  • Place the bike on its side stand on a solid, level surface4. For best drainage, you can upright the bike using a stand, but always ensure it is stable and won’t tip.
  • Remove the skid plate if equipped (use a socket and ratchet), which gives easy access to the drain bolt1.
  • Clean around the oil filler cap/dipstick to reduce potential contamination4.

Draining the Oil

  • Locate the oil filler cap. It’s behind the kickstarter on the right side of the bike1.
  • Unscrew and remove the oil filler cap/dipstick and set it aside on a clean surface.
  • Place the drain pan under the crankcase drain bolt. Some owners use aluminum foil to form a trough from the drain hole to the pan, preventing oil from spilling onto the frame or skid plate1.
  • Using the 24mm socket and ratchet, carefully remove the drain bolt. Be ready—oil will flow quickly. Allow as much old oil as possible to drain out completely2.

Cleaning and Checking the Mesh Filter

  • As you remove the drain bolt, note that there is a small spring and a reusable mesh oil filter inside. Do not lose them. The mesh filter may look like a thimble2.
  • Inspect the filter carefully. Rinse it with clean solvent or kerosene and wipe away any debris or metal shavings. Metal shavings could signal internal engine wear or damage—if you find any, consider a more thorough inspection of the engine2.
  • Let the filter dry before reinserting it.

Reassembling and Filling with New Oil

  • Once the oil is done draining, place the cleaned mesh oil filter and spring back into their respective positions in the drain hole.
  • Reinstall the drain bolt by hand.
  • Using your torque wrench, tighten the bolt to precisely 11 ft-lbs (15 Nm). Overtightening can damage the threads in the soft aluminum case1. If the threads are already stripped, seek repair before adding oil.
  • With the drain bolt secured, use a funnel to pour in fresh 10w-30 motorcycle oil to the recommended level (just over 1 quart, but always check your owner’s manual). Avoid overfilling.

Checking the Oil Level

  • Hold the bike upright (not on the side stand) and allow it to settle for a minute.
  • Insert the dipstick without screwing it in all the way1.
  • Remove the dipstick and check that the oil reaches the “upper” mark. If not, add a little more oil and recheck. Do not overfill.

Final Steps

  • Reinstall the dipstick securely.
  • Start the engine and let it idle for a couple of minutes, then check for leaks around the drain plug.
  • Turn the engine off, let it sit a few minutes, then recheck the oil level and top up if necessary.
  • Dispose of used oil and shop towels at a proper recycling center.
  • Reinstall the skid plate.

2009 CRF150F Model-Specific Call-Outs

  • The 2009 CRF150F continues to use a reusable mesh oil filter rather than a paper cartridge. Be careful not to damage this part during cleaning—it is not a disposable filter.
  • Always use oil that meets or exceeds JASO MA or MB standards for wet clutches4.
  • Owners have found using foil to guide oil into the pan helps control mess under the engine1.
  • When checking oil, the dipstick should only be inserted and not screwed in for an accurate reading1.
  • If you encounter a stripped drain plug bolt, it must be repaired before proceeding to avoid oil leaks and possible engine damage.

Consistent oil changes using high-quality lubricants will keep your CRF150F running reliably for thousands of miles of off-road fun. Have more questions? Connect with MotoSport’s tech support team for personalized recommendations and expert product advice.

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Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.