How to Change the Oil in a 2007 Honda CRF250X

Shop parts for a 2007 Honda CRF250X Dirt Bike.

Changing the oil in your 2007 Honda CRF250X is essential to keep the engine running smoothly and to maximize the lifespan of the bike. This guide is proprietary to MotoSport.com and designed to be as detailed and clear as possible, outlining the tools you'll need, step-by-step instructions, and important model-specific tips for the CRF250X.

Tools Needed

  • Socket set (particularly 10mm, 12mm, and 17mm sockets)
  • Oil drain pan
  • Clean rags
  • Torque wrench
  • Funnels (preferably small and clean)
  • New oil filter (recommended with every other change or as specified)
  • Fresh engine oil (690 ml for engine, 720 ml for transmission, per Honda spec)
  • Replacement O-rings (optional, but recommended for the drain bolt and filter cover)

Oil Type and Capacity

  • Engine oil:– 690 ml (not 960 ml, this is a common mistake)
  • Transmission oil:– 720 ml (check the sight/overflow plug for proper level)
  • Use high-quality 4-stroke motorcycle oil (10W-40, JASO MA/MA2 rated is recommended)

Step-by-Step: Engine Oil Change

  1. Warm up the Bike
    • Start the CRF250X and let it run for 1–2 minutes to warm the oil. This helps oil drain more easily.
  2. Remove Protective Parts
    • If equipped, remove the skid plate using your 10mm socket to access the drain bolt more easily.
  3. Locate and Remove the Engine Oil Drain Bolt
    • The engine oil drain bolt is underneath the bike, not the one near the shift lever (–that's for transmission fluid).
    • Place an oil pan under the drain bolt and remove it with a 17mm socket. Allow oil to drain completely.
    • Clean the drain bolt thoroughly and inspect or replace the copper crush washer if worn.
  4. Remove and Inspect the Oil Filter
    • Use the appropriate socket to remove the oil filter cover bolts (one long, one short–long goes on top, short goes on bottom).
    • Remove the oil filter. Replace it with a new one if due, and clean the filter chamber and cover.
    • Lubricate the filter cover O-ring with a bit of fresh oil before reinstalling to ensure a good seal.
  5. Reinstall Drain Bolt
    • Apply a light coat of oil to the threads, reinstall the drain bolt, and tighten to manufacturer torque spec.
  6. Add Fresh Oil
    • Use a clean funnel to add exactly 690 ml of fresh oil through the fill hole.
  7. Check Oil Level
    • Start the bike and let it idle for a minute. Turn it off, wait a few minutes, and check the oil level with the dipstick on level ground. Add oil if necessary.
  8. Dispose of Old Oil Properly
    • Recycle used oil at an appropriate location.

Step-by-Step: Transmission Oil Change

  • Locate the transmission drain bolt: It's on the left side, about 50mm in front of the shifter shaft and takes a 12mm socket.
  • Remove the bolt, allow oil to drain, reinstall the bolt (replace washer if needed), and fill through the side fill bolt.
  • Check by filling until oil just begins to run out the overflow hole while the bike is level. Use 720 ml as a reference.

2007 Honda CRF250X-Specific Callouts

  • Do not overfill:– The correct engine oil amount is 690 ml, which is less than some online sources and manual misprints. Overfilling can cause poor performance or engine damage.
  • Separate engine and transmission fluids:– The CRF250X uses a split lubrication system; never mix them up or use a single fill point for both.
  • O-Rings and bolts:– Clean and inspect the O-ring on the oil filter cover. Always note that the top filter cover bolt is longer.
  • Skid plate removal:– If you have an aftermarket skid plate, you may need to remove it for access.
  • Filling transmission:– Don't be alarmed if the oil doesn't spill out of the overflow hole immediately after a cold fill—run the bike, let it cool, then check again on a level surface to confirm proper level.

Common Mistakes to Avoid

  • Using the wrong drain plug or mixing up engine and transmission drain locations
  • Overfilling or underfilling fluids
  • Forgetting to reinstall washer or O-ring, causing leaks
  • Using car oils without JASO MA/MA2 spec
  • Neglecting to tighten to the correct torque specification

Final Checks

  • Run the engine, check for leaks at drain bolt, oil filter cover, and fill bolt.
  • Wipe down any spilled oil to prevent dirt buildup or fire hazard.
  • Replace skid plate if removed.

Regular oil changes will keep your Honda CRF250X running at its best for years to come. For OEM parts, filters, tools, and performance oils, trust MotoSport.com – your one-stop shop for dirt bike maintenance needs.

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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.