How to Change the Oil in a 2007 Honda CRF250R

Shop parts for a 2007 Honda CRF250R Dirt Bike.

If you own a 2007 Honda CRF250R, changing your oil regularly is vital to keeping your engine and transmission healthy and your dirt bike running at peak performance. This guide, proprietary to MotoSport.com, will explain each step in detail and highlight any specific points to watch for unique to your CRF250R.

Tools & Supplies Needed

  • Socket wrench set (10mm and 12mm sockets commonly used)
  • Oil drain pan
  • Funnel
  • New engine oil (Honda GN4 10W-40 or equivalent)
  • New transmission oil (Honda GN4 80W/85W or equivalent)
  • New oil filter (Honda part recommended)
  • Replacement crush washers (for both drain bolts)
  • Clean rags
  • Torque wrench (recommended)
  • Bike stand (preferably with a hole for draining oil)

Before You Begin

  • Warm up the engine for 2-3 minutes. Warm oil drains faster and removes more contaminants.
  • Place the bike on a level stand to ensure accurate oil measurement and complete drainage.

Step-by-Step Oil Change Instructions

  1. Remove the Skid Plate
    • Use a 10mm socket to remove the skid plate if installed. This provides clear access to the engine oil drain bolt.
  2. Drain the Engine Oil
    • Locate the engine oil drain bolt underneath the engine case. (Do not confuse this with the transmission drain, which is under the shift lever.)
    • Place an oil drain pan under the bolt and use the appropriate socket to remove the bolt. Allow the oil to fully drain.
    • Inspect the old oil for metallic particles as a check on engine health.
    • Replace the crush washer on the drain bolt, then reinstall the bolt and torque to specification (check your service manual for the recommended torque setting).
  3. Remove and Replace the Oil Filter
    • Locate the oil filter cover, remove the bolts, and slide out the old oil filter.
    • Lubricate the new filter's O-ring with a dab of fresh oil and install it.
    • Reinstall the oil filter cover and its bolts.
  4. Drain the Transmission Oil
    • Find the transmission oil drain bolt under the shift lever side of the bike.
    • Place the drain pan beneath, remove the bolt, and let the oil drain completely.
    • Always replace the crush washer before reinstalling the bolt. Torque to proper spec.
  5. Refill Engine Oil
    • Remove the engine oil fill cap. Using a funnel, pour in the specified amount of new oil. For the 2007 CRF250R, this is typically about 0.75L (0.8 US qt) when changing the filter, but always check your owner's manual for the exact amount.
    • Do not blindly fill to the measured amount–add oil until it is at the correct level on the dipstick or "full" mark. Overfilling can cause problems, so err on the side of caution and re-check after the engine has run.
  6. Refill Transmission Oil
    • Remove the transmission oil fill cap and the check/overflow bolt. Fill with new oil (approx. 0.73L or 0.77 US qt for the 2007 CRF250R) until oil just begins to trickle out of the check hole. Reinstall the check bolt and then the fill cap.
  7. Start the Engine and Re-Check
    • Start the bike and let it idle for a few minutes. Shut off the engine and allow the oil to settle for a minute.
    • Re-check the oil levels for both engine and transmission, topping off if necessary. Oil tends to drop slightly after initially running the engine with new oil.
  8. Dispose of Old Oil Properly
    • Take your used engine and transmission oil to a recycling center or an authorized drop-off location.

Model-Specific Tips: 2007 Honda CRF250R

  • This bike uses separate compartments for engine oil and transmission oil—make sure you do not mix them or their fill/drain points. The locations are similar from 2004–2009 on the CRF250R series.
  • When filling transmission oil, do not overfill by blindly adding the manufacturer's recommended amount; always use the check/overflow bolt. Once oil starts coming out of that hole, that's your maximum. This prevents pressure issues or leaks.
  • Always replace the crush washers on both drain bolts to prevent future leaks.
  • After running the engine post-fill, oil levels tend to drop slightly–plan to "top off" as your last step for a perfect fill. This is especially important if you've fully drained the system or replaced the oil filter.
  • This model's drain and fill points are easy to confuse—double-check the service manual for diagrams or watch a year-specific video if you're unsure.

Final Checks

  • Ensure all bolts are tight, but avoid overtightening, especially on the aluminum engine cases.
  • Check for any oil leaks after your first ride.

Your 2007 Honda CRF250R is now ready to hit the track or the trail with fresh oil for optimum performance and engine health. Regular oil changes, following the above MotoSport.com guide, are the single best investment you can make for your bike's reliability and longevity.

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Shop Oil Fillers and Drain Plugs for a 2007 Honda CRF250R 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.