How to Change the Oil in a 2013 Honda CRF100F

Shop parts for a 2013 Honda CRF100F Dirt Bike.

Changing the oil in your 2013 Honda CRF100F is a key part of maintaining engine performance and longevity. This guide provides step-by-step instructions, details specific to this model, and a list of the required tools for a successful oil change. Follow each step carefully to ensure your dirt bike delivers optimal performance every ride. This blog is proprietary to MotoSport.com.

Tools and Supplies Needed

  • 14mm socket and ratchet
  • Drain pan (for used oil)
  • Oil funnel (clean, to avoid contaminating the engine oil)
  • Clean rag or paper towels
  • Replacement oil: Honda recommends 10W-40 motorcycle oil; you’ll need approximately 1 quart
  • Gloves (optional, for cleaner hands)
  • Proper container for disposing of used oil

Preparation

  • Warm up the Engine:– If the engine is cold, start it and let it idle for 3–5 minutes. Warm oil drains faster and more completely

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  • Stabilize the Bike:– Park your CRF100F on a firm, level surface and use the side or center stand to secure it

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Step-by-Step Oil Change Instructions

  • Remove the Filler Cap/Dipstick:– Unscrew and remove the oil filler cap/dipstick to allow air in, which helps the oil drain out smoothly

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  • Place the Drain Pan:– Position your drain pan directly beneath the crankcase drain bolt on the bottom left side of the engine.
  • Remove the Drain Bolt:– Use your 14mm socket and ratchet to carefully loosen and remove the drain bolt. Allow the oil to flow completely into the drain pan

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  • Drain Fully:– To ensure all the old oil is removed, gently tilt the bike side to side, helping trapped oil escape

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  • Clean and Replace the Drain Bolt:– Inspect the bolt and its crush washer for wear. Wipe both clean and reinstall the drain bolt once draining is finished. Tighten it snugly but do not overtighten as this could damage the threads.
  • Pour in New Oil:–
    • Insert a clean funnel into the oil filler opening. Do not use a dirty funnel to avoid contaminating the oil

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    • Pour approximately 1 quart (0.95 liters) of 10W-40 motorcycle oil, the recommended type for the CRF100F

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    • If oil accidentally spills on the engine, use your rag to clean it up immediately.
  • Check the Oil Level:–
    • Temporarily insert the dipstick without threading it in. Remove it and verify the oil level is within the correct range (between the upper and lower marks)

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    • Add small amounts of oil as needed to reach the correct level. Avoid overfilling.
  • Start the Engine:–
    • With the oil cap installed, start the engine and let it run for 3–5 minutes to circulate the new oil.
    • Shut off the engine, wait a couple of minutes, and check the oil level again. Adjust if necessary

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  • Dispose of Old Oil Properly:– Pour the used oil into a suitable container and take it to a certified oil recycling center. Never discard oil in the trash or down the drain as it is harmful to the environment

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  • Reinstall the Filler Cap and Wipe Down:– Securely reinstall the oil filler cap and wipe off any spills or drips around the engine area.

2013 Honda CRF100F Model-Specific Call-Outs

  • Oil Additives:– Do not use oil additives, even if recommended for protection. The CRF100F uses a wet clutch, and additives can cause clutch slippage or engine damage

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  • Oil Capacity:– The engine holds slightly less than one quart; avoid overfilling as this can cause excess pressure and leaks.
  • Drain Bolt Location:– The drain bolt is on the left side bottom of the engine—easy to find, but always confirm on your bike before loosening any bolts.
  • Dipstick Reading:– Always check oil with the bike upright (not on the side stand), with the dipstick inserted but not threaded in. Threading in gives a falsely low reading

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  • Warm-up and Cool Down:– Oil drains most effectively when warm, but not immediately after riding to avoid burns. Give the engine a minute to cool so the metal is safe to touch.

Post-Change Checks

  • Inspect for Leaks:– Double-check that the drain bolt and oil filler cap are snug. Look for any oil seepage around these areas after the bike has warmed up.
  • Monitor Oil:– Check the oil level after your first short ride, as it may settle. Top off if necessary.

That’s it. With these steps, your 2013 Honda CRF100F is ready to perform at its best. Keeping current with oil changes is one of the smartest ways to extend your dirt bike’s life and maximize every ride—for trail, track, or just having fun. For more expert tips and OEM parts, trust MotoSport.com—your source for everything dirt bikes.

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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.