How to Change the Oil in a 2020 Honda CRF50F

Shop parts for a 2020 Honda CRF50F Dirt Bike.

Keeping your 2020 Honda CRF50F running smoothly means regular maintenance, and an oil change is one of the most important tasks. Follow this robust, step-by-step guide proprietary to MotoSport.com to ensure your mini dirt bike remains in top condition. This process applies to all CRF50F models from 2000 onward, including your 2020 model, with a few specifics you'll want to keep in mind.

Tools and Supplies Needed

  • 17mm socket and ratchet (for drain bolt)
  • Torque wrench (for proper reinstallation torque, 18 ft-lbs)
  • Oil drain pan (low profile preferred due to small ground clearance)
  • Shop towels or rags (for cleanup)
  • Measuring cup (to ensure accurate oil fill – 600ml/600cc)
  • New engine oil (Honda GN4 10W-40 or Maxima 10W-40 recommended)
  • Funnel (optional but makes for a cleaner pour)
  • Gloves (optional, for protection)
  • Bike stand or jack (optional, but helps level and stabilize the bike)

Steps to Change the Oil

  1. Warm up the engine.
    • Start the CRF50F and let it idle for 3 to 5 minutes. Warming the engine helps the oil flow out more easily.
    • Safety Note: Be careful not to touch the hot engine parts.
  2. Stabilize the bike.
    • Place the bike on a stand or jack it to level it as much as possible. The low ground clearance means a low-profile pan is preferred for catching the oil.
  3. Remove the oil fill cap.
    • Unscrew the oil fill cap/dipstick on the right side of the engine to allow air in; this helps the oil drain faster.
  4. Locate and remove the drain bolt.
    • Using a 17mm socket and ratchet, remove the drain bolt located on the underside of the engine.
    • Let the old oil drain completely into the pan. You may tip the bike slightly to ensure all oil evacuates.
    • Be careful—the oil may be hot.
  5. Inspect and reinstall the drain bolt.
    • Check the condition of the drain bolt and washer. If the washer is damaged, replace it.
    • Reinstall the drain bolt by hand to avoid cross-threading, then tighten with a torque wrench to 18 ft-lbs as specified for this model.
  6. Refill with new oil.
    • Using a clean measuring cup, pour in 600 ml (600 cc) of fresh 10W-40 oil, such as Honda GN4 or Maxima SynBlend, via the fill hole.
    • A funnel is helpful to avoid spills.
  7. Check oil level.
    • Insert the dipstick/fill cap but do not screw it in; remove and ensure oil level is within the marked range.
    • If necessary, add a little more oil to reach the correct level—but do not overfill.
  8. Start the engine and check for leaks.
    • Run the engine for a minute, then turn it off and check for leaks around the drain bolt.
    • Recheck the oil level and top off if needed.
  9. Dispose of old oil properly.
    • Take used oil to a recycling center or auto shop that accepts waste oil. Do not pour it down the drain.

Honda CRF50F Specific Call-Outs (2020 Model)

  • Drain Bolt Location: On all CRF50F models, including the 2020, the oil drain bolt is easily accessible underneath the engine near the bottom of the crankcase. Clearance is low, so a shallow drain pan is best.
  • Drain Bolt Torque: The correct torque is 18 ft-lbs to prevent leaks or case damage.
  • Oil Capacity: Use exactly 600ml (20.3 oz) of oil. Overfilling can cause pressure issues and leaks in these small engines.
  • Oil Type: Honda GN4 10W-40 is factory recommended, but Maxima SynBlend 10W-40 is a good alternative.
  • No Oil Filter: The CRF50F does not have a replaceable oil filter, simplifying your routine maintenance.
  • Routine Interval: For new bikes, change oil after the first 10 hours or 300 miles, and then every 6 months or 1,000 miles, whichever comes first.
  • Service Manual Reference: While the process is straightforward, consult your owner's manual for model year nuances if you have engine modifications or high-stress use cases.

Changing the oil is an easy, fundamental skill that ensures your 2020 Honda CRF50F stays reliable and fun to ride. For all your maintenance supplies, count on MotoSport.com as your trusted source.

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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.