How to Change the Oil in a 2025 Honda CRF50F: Complete Step-by-Step Guide

Shop parts for a 2025 Honda CRF50F Dirt Bike.

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Tools and Supplies You Need

  • 17mm socket and ratchet
  • Socket extension (optional, for easier reach)
  • Torque wrench (capable of 18 ft-lbs)
  • Oil drain pan (shallow pan recommended due to low ground clearance)
  • Shop rags or paper towels
  • Honda GN4 10W-40 oil or equivalent (you'll need about 600 mL / 0.63 quarts)
  • Funnel (for mess-free refilling)
  • Latex or nitrile gloves (optional, for cleanliness)

Pre-Change Prep

  • Start the engine and let the bike idle for 3-5 minutes to warm the oil. This helps it drain thoroughly. Be careful—engine parts will be hot.
  • Turn off the bike and set it upright on a level surface. For easiest access, elevate the bike with a stand if you have one. If not, ensure it's stable and flat. The CRF50F sits low, so a shallow drain pan will help.

Step-by-Step Oil Change Instructions

  1. Remove the Filler Cap/Dipstick
    • Unscrew and remove the oil filler cap/dipstick (located on the crankcase right side). Set it aside. This allows the oil to drain more freely.
  2. Position the Drain Pan
    • Place your oil drain pan directly beneath the engine's oil drain bolt at the bottom of the crankcase. Make sure the pan is big enough to catch all oil and low enough to fit under the bike.
  3. Remove the Oil Drain Bolt
    • Using your 17mm socket and ratchet, carefully remove the drain bolt and washer. The bolt is positioned underneath the engine. Oil will begin to flow out—watch your hands as it could be hot.
  4. Let the Oil Drain Completely
    • Allow all oil to drain from the engine. Gently tilt the bike upright if it's on the side stand to make sure all oil escapes. This may take several minutes.
  5. Inspect and Clean the Drain Bolt
    • Wipe off the drain bolt and check the sealing washer. Replace the washer if damaged or crushed. This prevents future leaks.
  6. Reinstall the Drain Bolt
    • Thread the drain bolt back into the crankcase by hand. Use a torque wrench to tighten to 18 ft-lbs (25 Nm). Do not overtighten—the crankcase is soft aluminum and can strip.
  7. Add New Oil
    • Insert a funnel into the oil fill port. Pour in 600 mL (0.63 quarts) of 10W-40 motorcycle oil (Honda GN4 or equivalent).
    • Let the oil settle for a minute, then insert the dipstick without screwing it in to check the oil level. Top up if needed. Important: Do not screw the dipstick in when checking–the level is read with it just resting in the threads.
  8. Final Steps
    • Reinstall and tighten the filler cap/dipstick.
    • Wipe up any oil drips or spills.
    • Start the engine and let it idle for a minute. Turn it off, allow it to sit for another minute, and re-check the oil level. Add more oil if necessary to bring it to the top mark on the dipstick (again, do not thread the dipstick to check the level).
    • Dispose of the used oil responsibly at a local recycling center or auto parts store.

Special Call-Outs for the 2025 Honda CRF50F

  • The oil drain torque spec is 18 ft-lbs (25 Nm). Use a torque wrench to prevent overtightening.
  • The oil capacity is 600 mL (0.63 quarts). Do not overfill, as it may cause leaks and engine issues.
  • Always check oil using the dipstick resting on the threads, not screwed in. This ensures an accurate reading specific to the CRF50F design.
  • No oil filter change is required for this model, as it uses a screen-type filter which is not serviceable as part of routine oil changes.
  • Low ground clearance–use a shallow drain pan to avoid spilling oil when draining.

Why Regular Oil Changes Matter

  • Fresh engine oil is critical for engine longevity. Make sure to change oil at recommended intervals–typically every 10-15 hours of riding or as stated in your owner’s manual.
  • This simple routine task can add years of reliable fun to your Honda CRF50F–these engines are renowned for durability when maintained with regular oil changes.

Ready to ride? Check out MotoSport.com for all your maintenance needs, OEM Honda oil, service tools, and more.

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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.