How to Change the Oil in a 2024 Honda CRF125FB Dirt Bike

Shop parts for a 2024 Honda CRF125FB Dirt Bike.

Changing the engine oil regularly in your 2024 Honda CRF125FB is crucial for maintaining performance and longevity. This guide, proprietary to MotoSport.com, provides a detailed, model-specific walkthrough for a safe, effective oil change.

Tools & Supplies Needed

  • 17mm socket (a deep well socket or with extension preferred)
  • Ratchet wrench
  • Drain pan (to catch old oil)
  • Funnel (optional, but helpful)
  • 1 liter (0.9 US qt) of 10W-30 or 10W-40 4-stroke motorcycle oil
  • New sealing washer (crush washer) for drain bolt
  • Clean rags or paper towels
  • Torque wrench (capable of 18 lbf–ft / 24 N–m)
  • Latex or nitrile gloves (recommended)

Step-by-Step Oil Change Instructions

  1. Warm Up the Engine
    • Let the engine idle for 3–5 minutes so the oil flows more freely, then shut off the engine.
    • Wait 2–3 additional minutes to allow oil to settle into the crankcase.
  2. Position the Motorcycle
    • Place your bike on its side stand or a stand on a firm, level surface for stability.
  3. Locate and Remove the Oil Fill Cap/Dipstick
    • Unscrew the cap to allow air in while the oil drains. Set aside the dipstick on a clean rag.
  4. Drain the Old Oil
    • Place a drain pan beneath the crankcase drain bolt.
    • Use a 17mm socket to remove the drain bolt (located under the engine).
    • Allow all oil to fully drain out. Use a rag as needed to clean up any spills.
  5. Replace the Drain Bolt and Washer
    • Install a new crush (sealing) washer on the drain bolt.
    • Hand thread the bolt back in, then tighten with your ratchet.
    • Use a torque wrench to tighten the bolt to 18 lbf–ft (24 N–m).
  6. Refill with New Oil
    • Insert a funnel into the oil fill opening.
    • Pour in 0.9 US qt (0.85 L) of 10W-30 or 10W-40 motorcycle oil. Honda GN4 works well but other quality brands are fine.
    • Remove the funnel and wipe up any drips.
  7. Check Oil Level
    • Install the dipstick, but do not screw it in when checking the oil level. Set it in, remove, then read.
    • Level the bike, hold it upright, then remove and inspect the dipstick. The oil should be at or near the upper mark.
    • Add oil if needed, but do not overfill.
  8. Run and Re-Check
    • Start the engine. Let it idle 3–5 minutes, then turn off and wait 2–3 minutes.
    • Check the oil level again and top up if necessary.
  9. Inspect for Leaks
    • Examine the bottom of the engine and around the drain bolt for any oil leaks.
  10. Dispose of Used Oil Properly
    • Pour the old oil into a sealed container and take it to a recycling location or auto parts store.
    • Never pour oil down the drain or on the ground.

Model-Specific Notes and Call-Outs

  • No oil filter: The 2024 CRF125FB (like other CRF125 models) does not have a replaceable oil filter. This makes regular oil changes even more critical to engine health. Change oil every 10 hours of riding or as needed for your usage pattern.
  • Oil capacity: Do not overfill—the engine takes 0.9 US qt (0.85 L) even for a full change. If you—ve rebuilt the engine, it may take slightly more.
  • Dipstick procedure: When checking the oil, rest the dipstick in the fill hole but do not thread it in—this gives an accurate reading for Honda CRF125 engines.
  • Spec oil: Use only quality, motorcycle-specific oil—general automotive oils are not recommended, as wet clutches require unique additives.
  • Crush washer: Always replace the sealing washer to prevent leaks and ensure correct torque on the drain plug.
  • Tightening torque: Overtightening the drain bolt can damage engine cases; always use a torque wrench for best results.

Summary

  • Warm up the bike.
  • Drain old oil with drain bolt removed.
  • Replace crush washer, torque drain bolt.
  • Fill with correct oil to capacity.
  • Check level carefully and top up if needed.
  • Dispose of oil responsibly.

Regular oil maintenance on your 2024 Honda CRF125FB is quick, easy, and vital. Keep your dirt bike running strong by performing oil changes as outlined above and always using the proper tools, methods, and oil. If in doubt, consult your owner—s manual or a certified Honda technician for assistance.

Related Shopping Categories

Shop Motor Oil for a 2024 Honda CRF125FB Dirt Bike.

Shop Oil Filters for a 2024 Honda CRF125FB Dirt Bike.

Shop Oil Drain Pans for a 2024 Honda CRF125FB Dirt Bike.

Shop Tools for a 2024 Honda CRF125FB Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2024 Honda CRF125FB Dirt Bike.

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.