How to Change the Oil in a 2026 Honda CRF125F

Shop parts for a 2026 Honda CRF125F Dirt Bike.

Changing the oil in your 2026 Honda CRF125F is a straightforward maintenance task that can significantly extend the life of your bike’s engine. Regular oil changes are especially important for this model, as it does not have an oil filter. Here’s a step-by-step, MotoSport.com proprietary guide to help you get the job done confidently and correctly.

Tools and Supplies Needed

  • 1 quart (0.9 US qt) of 10W-30 or 10W-40 motorcycle-specific oil (Honda GN4 or any high-quality motorcycle oil is recommended)
  • 17 mm socket and ratchet (preferably with an extension for easier access)
  • Oil drain pan
  • New sealing washer for the drain bolt (highly recommended to ensure a leak-free seal)
  • Torque wrench (capable of measuring at least 24 N·m or 18 lbf·ft)
  • Shop towels or rags for cleanup
  • Oil funnel (to reduce spills when refilling the oil)

Special Model Call-Outs for the 2026 CRF125F

  • No oil filter: This model does not use an oil filter, so timely oil changes are even more critical compared to bikes with filters.
  • Wet clutch system: Always use motorcycle oil compatible with wet clutches to prevent clutch slippage and wear.
  • Oil check method: When checking oil level, do not screw the dipstick in–simply insert it into the filler port to get an accurate reading.
  • Oil capacity: The CRF125F takes just under 1 US quart (approximately 0.85 liters). Overfilling can cause performance issues or leaks.

Step-by-Step Oil Change Procedure

  1. Warm Up the Engine
    • Start and idle the engine for 3–5 minutes to thin the oil. This allows it to drain more completely.
    • Turn off the engine and let it sit for 2–3 minutes. This ensures that the oil settles in the sump.
  2. Position the Bike
    • Place the bike on a level surface using the side stand or a bike stand so it is upright and stable.
  3. Remove the Dipstick & Drain the Oil
    • Unscrew and remove the oil fill cap/dipstick.
    • Position your oil drain pan underneath the crankcase.
    • Using the 17mm socket, loosen and remove the engine oil drain bolt and its sealing washer, located under the engine. Let the oil drain completely–this usually takes a few minutes.
  4. Install New Sealing Washer & Drain Bolt
    • Replace the old sealing washer with a new one on the drain bolt to avoid leaks.
    • Reinstall the drain bolt and tighten it to 18 lbf·ft (24 N·m) with the torque wrench.
  5. Refill with Fresh Oil
    • Using your funnel, pour in up to 0.9 US quart (0.85 liters) of fresh 10W-30 or 10W-40 motorcycle oil.
    • Screw the oil cap/dipstick back on securely.
  6. Verify the Oil Level
    • Start the engine and let it idle for 3–5 minutes. Stop the engine and let it settle for another 2–3 minutes.
    • With the bike standing upright, remove the dipstick, wipe it clean, and reinsert it without screwing it in.
    • Check that the oil level is at or near the upper mark. Top off as needed, being careful not to overfill.
  7. Check for Leaks & Dispose of Old Oil
    • Inspect the area around the drain bolt for leaks. Tighten further only if necessary, but avoid overtightening.
    • Responsible disposal: Pour the old oil into a sealed container and take it to a recycling facility or suitable auto parts store—never dump into the environment.

Common Questions and Owner Tips

  • Oil Change Frequency: For a 2026 CRF125F, it’s recommended to change the oil every 10 hours of riding–sooner if riding in especially dusty or muddy conditions.
  • No Oil Filter: Without an oil filter, debris can circulate more readily in the engine, making regular oil changes crucial.
  • Troubleshooting: Always check for leaks after your first short ride following an oil change. If you see oil at the bottom of the engine, recheck the drain bolt and washer installation.

Final Check and Safety Note

  • Always double-check the torque on your drain bolt and confirm correct oil level before your next ride.
  • Start your engine and observe for any strange noises or dash warning lights—these can indicate low oil or other issues.

By following these instructions, you’ll keep your Honda CRF125F running strong and dependable, ride after ride. For more OEM service parts, oils, and MotoSport.com exclusive maintenance kits, always trust our team for expert advice and fast shipping.

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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.