How to Change the Oil in a 2021 Honda CRF50F

Shop parts for a 2021 Honda CRF50F Dirt Bike.

Keeping your 2021 Honda CRF50F running strong requires regular oil changes. This guide prepared exclusively for MotoSport.com explains how to change the oil on your CRF50F, including a comprehensive tool list, step-by-step instructions, and specific call-outs unique to this model. Proper maintenance ensures your youth dirt bike runs smoothly and reliably for years to come.

Tools & Supplies Needed

  • 17mm socket and ratchet – For removing the oil drain bolt
  • Oil drain pan – To catch old oil
  • Measuring cup or graduated container – For accurate oil refill
  • Funnel – For easy pouring
  • Clean rags or paper towels
  • 600ml of 10W-40 motorcycle motor oil – Maxima, Honda GN4, or another quality multi-grade four-stroke oil
  • Optional: Drain plug crush washer (replace if it appears damaged or worn)
  • Optional: Magnetic drain plug – Helps trap any fine metal shavings in the future
  • Work gloves – Recommended for safety and cleanliness

Step-by-Step Oil Change Guide

  1. Run the Engine Briefly
    • Warm up your CRF50F for a few minutes to thin the oil, helping it drain more completely.
  2. Stabilize and Secure the Bike
    • Turn off the engine and let the bike rest for a minute. Place the bike securely on a stand or flat ground. Many find it easier to raise the front of the bike slightly to access the drain bolt.
  3. Locate and Remove the Drain Plug
    • Using the 17mm socket, locate the drain bolt on the bottom left side of the engine.
    • Position your drain pan underneath and carefully remove the drain bolt to let the oil flow out.
    • Be cautious: Oil may be hot if the bike was run recently.
  4. Remove the Oil Fill Cap
    • Remove the fill cap (dipstick) from the right side of the engine. This allows oil to drain faster by letting air in.
  5. Inspect the Drain Bolt & Washer
    • Wipe off the drain bolt and check the crush washer. Replace if it's damaged or deformed to ensure a tight seal.
    • If upgrading, consider installing a magnetic drain plug to help catch fine engine debris in future changes.
  6. Reinstall the Drain Plug
    • Once oil has fully drained, reinstall the drain bolt with the crush washer. Tighten it snugly, but do not over-tighten, as stripping the threads is a common mistake.
  7. Refill with Fresh Oil
    • Use a funnel and pour 600 milliliters (or CCs) of 10W-40 motorcycle oil into the engine. If you don't get all the oil out during draining, you may need slightly less – the manual's range is 600-800ml, but most owners find 600ml is ideal for a full change on this motor.
  8. Check Oil Level Properly
    • With the bike upright and level (not on the kickstand), insert the dipstick but do NOT screw it in. Just place it in to check the oil level.
    • The oil should be right at the top mark on the dipstick. Top off a little more if necessary, but do not overfill.
  9. Start the Engine and Recheck
    • Start the bike and let it idle for a minute to circulate the new oil.
    • Turn off the engine, let it sit for another minute, then double-check the oil level as above. Add oil if the level is below the mark.
  10. Dispose of Used Oil Properly
    • Take the used oil to a recycling center or hazardous waste facility. Never throw it in the trash or pour it outside.

Special Call-Outs for the 2021 Honda CRF50F

  • The oil capacity is approximately 600ml; however, the dipstick method is the most accurate way to confirm proper oil level.
  • No oil filter to replace – the CRF50F does not have an oil filter element, making changes simpler.
  • When the dipstick is used to check oil level, always rest it on the threads – do not screw it in during checking.
  • An optional magnetic drain plug is a valuable upgrade to trap fine metal particles from engine wear for peace of mind.
  • Always use oil specified for 4-stroke motorcycles. Automotive oils may lack proper additives for wet clutches.
  • If riding in extreme conditions or frequent use, change the oil more often than the manual—s minimum interval.

Final Pro Tips

  • Keep a maintenance log with each oil change's date and hours/mileage for peace of mind and resale value.
  • Warming the engine helps old oil flow better, getting more contaminants out.
  • If your child is new to dirt biking, involve them in basic maintenance – this is a great teaching opportunity.
  • Stock up on oil, a drain pan, and a replacement crush washer through MotoSport.com for your next maintenance cycle.

Regular oil changes are the most cost-effective way to protect your 2021 Honda CRF50F—s engine for countless trouble-free rides. With these easy-to-follow steps and MotoSport.com—s wide range of products, your mini-moto will run strong and reliable every time you hit the trail.

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Shop Oil Fillers and Drain Plugs for a 2021 Honda CRF50F 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.