How to Change the Oil in a 2006 Husqvarna CR125

Shop parts for a 2006 Husqvarna CR125 Dirt Bike.

As a proud owner of the 2006 Husqvarna CR125, keeping your dirt bike in top shape means regular maintenance, with oil changes being one of the most critical. This walk-through, proprietary to MotoSport.com, covers every detail you need for a hassle-free oil change, specific to your make, model, and year.

Tools and Supplies Needed

  • Socket wrench set (most importantly a 17 mm socket for the drain bolt)
  • Oil drain pan
  • Funnel
  • Measuring cup (for accurate oil refill)
  • Replacement oil (high quality 2-stroke transmission oil; check owner’s manual for specification and volume, typically 750ml for this model)
  • Replacement crush washer (for the drain plug, especially if the original is damaged or worn)
  • Clean rags
  • Triangle stand or bike lift
  • Shop gloves (optional but recommended)

Preparation Steps

  • Find a well-ventilated, level workspace. Lay down cardboard or absorbent pads in case of any spills.
  • Warm up the engine for a minute or two. Warm oil drains more efficiently and carries away more debris from inside the case. Be careful—avoid burns from hot engine parts or oil.
  • Turn off the bike and ensure it’s secure on a triangle stand or lift.

Step 1: Locate the Oil Drain Plug

  • The oil drain plug on the 2006 CR125 is positioned on the bottom of the right side of the crankcase, underneath the engine. You’ll need your 17 mm socket for this job.
  • Place your drain pan directly beneath the plug.

Step 2: Remove the Drain Plug and Drain the Oil

  • Slowly loosen the drain plug. Watch for the aluminum crush washer–make sure it doesn’t fall into the oil pan.
  • Allow all the old oil to drain fully. Tilting the bike slightly may help evacuate the last drops, but don’t let the bike fall.
  • Inspect the old oil for unusual coloration (milky or grey means water or clutch debris)–a little grey is normal due to clutch fibers, but watch for excess contamination.

Step 3: Inspect and Reinstall the Drain Plug

  • Check the crush washer. Replace it if it’s deformed or cracked.
  • Reinstall the plug by hand to avoid cross-threading, then snug it with a torque wrench if possible (consult your manual for the torque specification).

Step 4: Add Fresh Oil

  • Locate the oil fill cap on the right-hand side of the engine, just above the clutch cover.
  • Using a funnel, pour in the manufacturer-recommended amount of oil (in most cases, around 750ml, but check your manual).
  • Pour slowly and use a measuring cup–overfilling can create excess pressure and leaks.
  • For this model, you must use 2-stroke transmission oil, not engine oil, as the oil lubricates only the transmission, not the top end.

Step 5: Check the Oil Level

  • This bike uses an oil check bolt on the clutch cover. Remove the check bolt; with the bike upright, oil should just trickle out of the hole, indicating the level is correct.
  • If nothing comes out, add a small amount of oil until it just begins to drip from the check bolt hole, then reinstall the bolt.

Step 6: Final Checks and Cleanup

  • Double-check the tightness of the drain and check bolts as well as the fill cap.
  • Wipe down any spills and dispose of old oil properly (most auto parts stores accept used oil).
  • Start the engine, warm it up briefly, and inspect for leaks around the drain, fill, and check bolts.

2006 Husqvarna CR125 Model-Specific Notes

  • Drain bolt location: On the 2006 CR125, the plug is easy to access under the right side of the engine. Ensure you don’t mistake other bolts for the drain plug; reference your manual if unsure.
  • Oil volume: Stick closely to the recommended fill amount; incorrect oil levels can lead to clutch slip or gear selection issues.
  • Transmission only: This 2-stroke does not circulate oil to the cylinder or crank area—this oil change is for the transmission and clutch only.
  • Silicone gasket: If your bike’s clutch or fill caps show oil seepage, inspect the condition of any gaskets or O-rings and replace if necessary.

Bonus Tips

  • Changing oil after every 5–10 hours of riding is recommended for spirited or race use.
  • Keep a maintenance log. Record each oil change date, oil type, and quantity used.
  • Tighten all bolts to the manufacturer’s torque spec using a torque wrench–this avoids stripping threads, a common issue with aluminum cases.

Conclusion

Maintaining your 2006 Husqvarna CR125 with regular oil changes ensures a strong, reliable transmission and crisp shifting, letting you focus on the ride, not the wrench. For OEM and performance parts, rely on MotoSport.com to keep your ride running strong.

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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.