How to Change the Oil in a 2009 Honda CRF150R

Shop parts for a 2009 Honda CRF150R Dirt Bike.

Routine oil changes are crucial for keeping your 2009 Honda CRF150R engine running smoothly and ensuring the bike–s longevity. Below you–ll find a comprehensive, MotoSport.com proprietary guide detailing the necessary tools, step-by-step instructions, and important model-specific call-outs every owner should know before changing the oil. This guide covers both the engine and transmission oil, as required for the CRF150R.

Tools and Supplies Needed

  • 10mm and 12mm socket/wrench
  • Drain pan for used oil
  • Funnel
  • Clean rags or shop towels
  • New oil filter (KN-116 or Honda OEM)
  • New drain bolt washers (crush washers)
  • Honda GN4 10W-40 motorcycle oil (DO NOT use automotive synthetic oil)
  • Torque wrench
  • Flathead screwdriver (if needed to loosen oil filter cover)
  • Replacement drain bolts (if old ones are stripped or damaged)
  • Factory service manual (optional but recommended for specs and torque values)

Safety Precautions and Preparation

  • Only change the oil when the engine is warm—this helps suspend particles and makes oil flow easily, but never immediately after riding to avoid burns.
  • Ensure the bike is stable, ideally on a stand.
  • Work in a well-ventilated space away from open flames.
  • Wear protective gloves.

Step-by-Step Guide for 2009 Honda CRF150R Oil Change

  1. Remove Skid Plate (if equipped):
    • Loosen and remove the skid plate bolts to access the oil drain bolt.
  2. Locate Drain Bolts:
    • The engine oil drain bolt is typically found underneath the shift lever side of the bike.
    • The transmission oil drain bolt is on the opposite (right) side.
  3. Remove Dipsticks or Fill Caps:
    • On the engine side, unscrew and set aside the dipstick or oil fill cap to aid draining.
    • On the transmission side, also remove the cap to allow smooth draining.
  4. Drain Old Oil:
    • Position a drain pan beneath the engine oil drain bolt. Use a 12mm socket to remove the bolt. Let all oil drain out.
      Call-Out: Each side of the CRF150R has its own drain and fill points; drain both separately for a thorough oil change.
    • Repeat for the transmission oil drain bolt on the right side.
  5. Replace the Oil Filter (Engine Side Only):
    • Use the correct wrench to unbolt the oil filter cover on the left side (engine).
    • Remove the used filter and O-rings. Inspect for wear; replace if necessary.
    • Install the new filter and O-ring. Lightly oil the new O-ring for a better seal.
    • Reinstall the cover and torque to factory specification.
  6. Install New Drain Bolt Washers and Reinstall Drain Bolts:
    • Always use new crush washers on the drain bolts to prevent leaks. Torque all bolts to manufacturer specs.
  7. Refill with Fresh Oil:
    • For the engine side, pour in 590cc of Honda GN4 10W-40 if replacing the filter. If not changing the filter, use 560cc.
    • For the transmission side (clutch), add 580cc of the same oil. Use a funnel and pour slowly to avoid spills.
    • Call-Out: DO NOT USE regular automotive oil—the CRF150R requires motorcycle-specific oil for clutch performance and protection.
  8. Check Levels and Inspect for Leaks:
    • After filling both sides, reinstall the dipsticks/fill caps. Start the bike and let it idle for a few minutes.
    • Shut off the engine, allow oil to settle, then check the level using the dipstick, topping off if necessary.
    • Inspect all drain bolt and filter areas for leaks.

Special Tips and Model-Specific Call-Outs

  • CRF150R requires two separate oil changes: one for the engine, the other for the transmission (clutch). Each has its own drain bolt and fill location. Never mix up the sides.
  • Avoid overtightening drain bolts, as the CRF150R is known for soft drain bolt threads. Always use a torque wrench and replace bolts that are even slightly stripped to prevent costly repairs.
  • Dispose of oil responsibly at a local auto parts store or recycling center; never dump used oil outdoors.
  • Always use fresh oil matching Honda–s recommended specs. Using improper oil can lead to clutch and engine damage.
  • For detailed torque values, reference your CRF150R–s service manual. If you have lost or do not own a manual, contact your dealer or MotoSport.com–s support team for guidance.

Conclusion

Regularly changing your 2009 Honda CRF150R–s oil is one of the simplest and most important maintenance tasks. With the right supplies, a little patience, and attention to detail, you–ll help your dirt bike run at peak performance ride after ride. For OEM parts and premium oils, trust MotoSport.com to keep your Honda in race-ready shape.

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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.