How to Change the Oil in a 2021 Honda CRF300L Rally ABS

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Routine oil changes are crucial for the longevity and reliable performance of your 2021 Honda CRF300L Rally ABS. This guide, proprietary to MotoSport.com, provides all steps, tools, and alerts you need to confidently perform this essential maintenance procedure.

Tools & Supplies Needed

  • Torque wrench
  • 8 mm and 12 mm sockets
  • 4 mm Allen wrench (for skid plate removal; check your bike as some have different fasteners)
  • Oil drain pan
  • Rags and rubber gloves (for clean-up and protection)
  • Safety glasses (for eye protection)
  • Contact cleaner (to clean the area around the oil drain and filter as needed)
  • Measuring cup (for accurate oil measurement)
  • Replacement oil filter (OEM or equivalent)
  • Crush washer (replace this each oil change to avoid leaks)
  • Funnel (helps with a spill-free refill)
  • Fresh engine oil: Pro Honda GN4 10W-30 or other oil that meets API SJ or higher, JASO T 903 standard MA

Specifications

  • Oil Change Capacity (with filter): 1.5 Liters (1.6 US quarts)
  • Oil Change Capacity (oil only): 1.4 Liters (1.5 US quarts)
  • Recommended Interval: Initial after break-in at 600 miles, then every 8,000 miles
  • Check oil with bike vertical (not on the side stand), using the sight glass on the right engine case

Step-By-Step Oil Change Procedure

  • 1. Warm Up the Engine
    Start the bike and let it idle for about 2-3 minutes. This helps the oil flow and carries contaminants for draining. Shut the engine off and let it stand a minute to cool slightly, but change the oil while it's warm.
  • 2. Remove the Skid Plate (if equipped)
    Use a 4 mm Allen key or the appropriate tool to loosen and remove the skid plate bolts. Set the plate and hardware aside.
  • 3. Position the Drain Pan
    Place an oil drain pan directly under the oil drain bolt, located at the bottom of the engine case.
  • 4. Remove the Oil Drain Bolt
    Use a 12 mm socket to loosen the drain bolt. Be careful – oil will flow out quickly and can be hot. Remove the old crush washer from the bolt.
  • 5. Drain the Oil
    Allow the oil to drain completely. Tilt the motorcycle upright to help remove as much old oil as possible.
  • 6. Remove & Replace the Oil Filter
    Use the appropriate socket (8 mm is typical) to remove the three bolts on the oil filter cover (right engine side). Carefully pull off the cover. Remove the old oil filter—note its orientation. Clean inside the filter cavity with a rag, then install the new filter in the same direction. Replace the oil filter cover and tighten the bolts securely.
  • 7. Install the New Crush Washer and Drain Bolt
    Place a new crush washer on the drain bolt before reinstalling. Thread the bolt in by hand, then torque to specification (consult your owner's manual—common torque is around 24 Nm / 18 ft-lb, but confirm for your model year).
  • 8. Refill with Oil
    Remove the oil fill cap (right side of the engine). Using a funnel, pour in up to 1.5 liters (1.6 US quarts) of new engine oil. A measuring cup helps ensure accuracy. Do not overfill.
  • 9. Start and Circulate Oil
    With the fill cap installed, start the bike and let it idle for about 3 minutes. This allows oil to fill the filter and circulate throughout the engine. Shut off the engine and allow it to sit 2-3 minutes for oil to drain into the sump.
  • 10. Check and Adjust Oil Level
    Hold the bike vertical on level ground and look at the sight glass located on the right engine cover. The oil level should be between the upper and lower marks. Add oil as needed to reach the correct level. Do not overfill.
  • 11. Reinstall the Skid Plate
    Secure the skid plate with the original hardware, torquing to specification if available.
  • 12. Clean Up
    Wipe down any spilled oil with rags and dispose of used oil and the filter according to local regulations.

Model-Specific Call-Outs for 2021 CRF300L Rally ABS

  • ABS Variant: Oil change process is identical for both ABS and non-ABS models. ABS components do not impact oil change procedure.
  • Rally Skid Plate: The Rally model may come equipped with a larger skid plate. Use care during removal and reinstallation to avoid damaging the mounting tabs.
  • Oil Sight Glass: Ensure the bike is perfectly upright and on level ground for an accurate oil level reading. Checking oil while on a side stand will yield an incorrect (low) reading.
  • Crush Washer: Always replace the drain bolt's crush washer to prevent leaks.
  • Volume Check: If you are changing just the oil (not the filter), use 1.4 liters (1.5 US quarts) instead of 1.5 liters (1.6 US quarts). Overfilling can cause engine damage.
  • 8,000-Mile Interval: The 2021 CRF300L Rally has an extended oil change interval compared to many smaller displacement bikes, making it a good choice for longer adventure rides.

Disposal and Final Tips

  • Take used oil and filters to a certified recycling center.
  • Always check for leaks around the drain bolt and filter cover after your first ride post-oil change.
  • Record the date and mileage of your oil change for future reference.

Changing your oil is straightforward on the 2021 Honda CRF300L Rally ABS, and sticking to a regular maintenance schedule will ensure your dual-sport performer remains reliable out on the trail or on the street.

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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.