How to Change the Oil in a 2016 Honda CRF125FB: A MotoSport.com Expert Guide

Shop Parts for a 2016 Honda CRF125FB Dirt Bike.

Regular oil changes are a critical part of keeping your 2016 Honda CRF125FB running smoothly and extending its lifespan. Thanks to its simple design, oil changes on this model are straightforward—even for newer owners. This guide covers the tools required, each step in detail, and calls out specific details relevant to the 2016 CRF125FB.

Tools and Supplies Needed

  • 1 quart of 10W-40 motorcycle-specific oil (or 10W-30 if preferred; make sure it's suitable for wet clutches)
  • 17mm socket and socket wrench (an extension helps but isn't required)
  • Oil drain pan
  • Oil funnel
  • Shop towels or rags
  • (Optional but smart) New drain bolt crush washer
  • (Optional) Torque wrench (for precise tightening, not mandatory but optimal)

Steps to Change the Oil

  • Warm Up Your Engine
    • Start your CRF125FB and let it idle for 3–5 minutes. This helps thin out the oil, allowing it to drain more completely and carry contaminants with it.
  • Stabilize the Bike
    • Place the bike on a level surface. Use a stand if available for better stability and access to the drain plug.
  • Locate the Drain Plug
    • The drain plug is on the bottom center of the engine. Your skid plate will have a cutout for easy access.
  • Drain the Old Oil
    • Place your drain pan underneath the drain plug.
    • Use the 17mm socket to remove the drain bolt. Allow the oil to drain fully—this takes several minutes.
    • Be careful—the oil may be hot. Use shop towels to clean up any splashes.
    • Optional: Replace the crush washer to prevent leaks when re-tightening. This is especially wise if the washer shows wear or flattening.
  • Reinstall the Drain Plug
    • Reinstall the drain plug by hand at first, then tighten with your socket. If you have a torque wrench, tighten to 18 ft-lbs (216 inch-lbs) for best results.
  • Add New Oil
    • Remove the oil fill cap/dipstick on the right side of the engine.
    • Use a funnel and pour in 0.9 quarts (850cc or 850ml) of your chosen motorcycle oil. Avoid overfilling—the correct amount is just under a quart.
    • Let the oil settle for a few seconds.
  • Check the Oil Level
    • Stand the bike upright (not on a kickstand) for an accurate check.
    • Do not screw in the dipstick when checking—simply insert it, then remove to check the level. The oil should be at the upper mark.
  • Run and Re-check
    • Reinstall the dipstick/cap and start the bike. Let it idle 2–3 minutes, then shut it down. Wait a couple of minutes for oil to settle again.
    • Hold the bike upright and re-check the oil level with the dipstick (unscrewed).
    • Top off if necessary, but don't overfill. Wipe excess oil from the engine area with a towel.

Important Model-Specific Notes for the 2016 CRF125FB

  • No oil filter: The 2016 CRF125FB and similar year models do not use an oil filter. This makes regular oil changes even more important for engine longevity.
  • Check the dipstick properly: Never screw in the dipstick when measuring the oil level. Just set it in the hole, remove, and read. This is crucial for all CRF125 models to avoid incorrect readings and overfilling.
  • Oil quantity: Actual oil capacity is just under 1 quart—about 0.9 quarts (850 ml)—so don't empty a full quart.
  • Service interval: Change oil every 10 hours of riding or after every major ride day, as there's no filter and the engine runs at high RPMs.
  • Crush washer replacement: Replace the drain bolt crush washer each time for best leak prevention—these are inexpensive and protect the case threads.

Disposal and Cleanup

  • Dispose of used oil at an authorized collection center—never pour it on the ground or down a drain.
  • Clean up spills with shop towels and dispose of oily towels properly.

Critical Reminders for the 2016 Honda CRF125FB Oil Change

  • Do not overfill. Too much oil can cause engine damage or leaks.
  • Check for leaks after starting the bike for a minute—look at the drain bolt area and under the engine.
  • Don't delay oil changes. Without an oil filter, the oil is the main defense against dirt and wear.

This complete oil change guide ensures owners of the 2016 Honda CRF125FB keep their machine running strong. Regular oil changes are quick, easy, and one of the most important steps you can take for years of off-road fun.

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Shop Oil Fillers and Drain Plugs for a 2016 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.