How to Change the Oil in a 2010 Honda CRF250R

Shop parts for a 2010 Honda CRF250R Dirt Bike.

Keeping your 2010 Honda CRF250R running strong means regular oil changes. Follow this expert step-by-step guide made for MotoSport.com customers to keep your dirt bike's engine and transmission healthy. Read on for tools, procedures, quantities, and unique model callouts so you get the job done right every time.

Tools and Supplies Needed

  • 10mm and 12mm socket or wrench (for removing drain bolts and, if equipped, skid plate)
  • Oil drain pan
  • Funnel
  • Pro Honda GN4 10w30 or recommended engine/transmission oil
  • Clean rags
  • New oil filter (highly recommended every other oil change or as needed)
  • Torque wrench (for re-installing drain bolts)
  • Parts cleaner or brake cleaner (optional, for cleaning the area)

Important Notes for the 2010 CRF250R

  • This model has separate engine oil and transmission oil compartments. Do not mix them.
  • Oil capacities are specific—overfilling can cause leaks or poor performance.
  • The engine should be at operating temperature (just warm, not hot to the touch) before draining oil for best results.
  • Always replace the copper crush washer on drain bolts if it's scratched or flattened to prevent leaks.

Step-by-Step Oil Change Instructions

  1. Warm Up the Engine
    • Start your CRF250R and let it idle for about 2-3 minutes to warm the oil. This helps oil drain quickly and completely

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    • Shut off the engine and place the bike on a stand for easy access.
  2. Remove the Skid Plate (if equipped)
    • Use a 10mm socket or wrench to remove bolts holding the skid plate under the engine

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    • Set the skid plate aside.
  3. Drain the Engine Oil
    • Locate the engine oil drain bolt — on the bottom of the crankcase, left side under the shifter

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    • Place the oil pan under the bike and use your socket/wrench to remove the bolt. Let the oil drain completely.
    • Check the oil for debris or metal—signs it's time for maintenance beyond just changing the oil.
  4. Replace or Service the Oil Filter
    • Remove the oil filter cover (right side of engine, three bolts). Slide out the old filter.
    • Lubricate the new oil filter O-ring with fresh oil and install it. Reinstall the oil filter cover, tightening bolts evenly and to spec.
  5. Reinstall the Engine Drain Bolt
    • Inspect or replace the copper drain plug washer as needed. Tighten the drain bolt with a torque wrench—refer to your owner's manual for the correct spec.
  6. Refill Engine Oil
    • Remove the oil fill cap/dipstick on the left side of the engine.
    • Using a funnel, pour in new engine oil. Oil capacity for the 2010 CRF250R engine is approximately 0.73 quarts (700ml) with filter change

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    • Do not overfill; check periodically with the dipstick. The oil should reach the full line when the bike is upright on level ground.
  7. Drain and Refill Transmission Oil
    • Locate the transmission drain bolt (right side, behind brake pedal on the crankcase)

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    • Remove the bolt and drain oil fully. Replace/inspect the washer and reinstall the bolt, torquing to spec.
    • Transmission oil fill bolt is on the right side case. Remove the bolt and fill with new oil until it starts to flow out the check/overflow hole

      . Transmission oil capacity is about 0.73 quarts (700ml).
    • Typical transmission oil for this model is also Pro Honda GN4 10w30, but always check your owner's manual or oil cap label.
  8. Check for Leaks and Confirm Level
    • Start the engine for 1–2 minutes. Shut off and let it sit for a few minutes.
    • Recheck oil levels in both engine and transmission, topping up if needed. Watch for leaks around drain plugs and the filter cover

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  9. Reinstall Skid Plate
    • Tighten bolts to secure the skid plate under the engine.

Specific CRF250R Tips and Callouts

  • Always use the same oil type/viscosity in both engine and transmission unless your owner's manual recommends otherwise

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  • Be exact with oil level: Too much or too little risks engine/transmission damage. On the transmission side, fill until oil just starts to escape the check bolt hole

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  • The 2010 Honda CRF250R uses separate oils; never try to combine or use a shared sump oil like some other dirt bikes.
  • Change your oil filter every other change for best protection, or more frequently during heavy use.

Disposal and Aftercare

  • Dispose of used oil and filters properly at a recycling center or auto parts store—never dump oil in household waste or drains.
  • Keep a log of your oil change mileage/hours for reference.

Performing regular oil changes on your 2010 Honda CRF250R is straightforward and critical for long engine and transmission life. Stick with this guide and enjoy peak performance at the track or trail.

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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.