How to Change the Oil in a 2019 Honda CRF450X

Shop parts for a 2019 Honda CRF450X Dirt Bike.

The 2019 Honda CRF450X is a high-performance dirt bike that demands regular maintenance to keep running at its best. One of the most important tasks is changing the oil—this keeps internal engine components well-lubricated, reduces wear, and prolongs engine life. Below, you’ll find a comprehensive, step-by-step guide exclusively for MotoSport.com customers. This guide is model-specific, reflecting the unique requirements and quirks of the 2019 CRF450X oil change process.

Tools & Supplies Needed

  • 10mm socket or T-handle (to remove skid plate bolts)
  • 10mm allen wrench (for oil drain plug)
  • Socket wrench
  • Oil drain pan
  • Gloves and rags (for cleanup)
  • New oil filter (Honda OEM or equivalent)
  • 2 Quarts of JASO MA-certified motorcycle oil (see owner’s manual for viscosity and specs)
  • Torque wrench
  • Replacement O-ring or drain plug gasket (recommended)
  • Funnel

Important Call-Outs for the 2019 CRF450X

  • The CRF450X uses separate compartments for engine and transmission oil–be sure you are accessing and refilling the correct side.
  • Honda uses a large, uniquely-shaped drain plug which can make removal messy, so position your oil pan carefully to avoid spills.
  • It’s highly recommended to run the engine for a couple of minutes before starting to warm the oil, allowing for more complete drainage.
  • The bike’s oil capacity is just under 1 quart for the engine side. Some riders add a bit more (up to 950ml) to the transmission compartment for additional protection, but always check your manual for specifics for your riding style and region.
  • If you ride in dusty, hot, or competitive conditions, consider changing your oil more frequently than the standard interval.

Step-by-Step Oil Change Instructions

  1. Warm up the engine
    • Start and idle the bike for 2–3 minutes. This helps thin the oil for a more complete drain and suspends contaminants.
  2. Remove skid plate
    • Using your 10mm socket, remove the three skid plate bolts (one left, one right, and one on the bottom).
    • Set the skid plate aside to access the drain plugs beneath the engine.
  3. Place oil drain pan
    • Slide your drain pan underneath the engine, centered below the drain plug.
  4. Remove the drain plug
    • With your 10mm allen wrench, carefully loosen and remove the engine oil drain plug. The Honda plug is oversized and may allow oil to flow rapidly—be ready.
    • Let all oil drain out—allow at least several minutes for it to fully empty out. Tilt the bike gently (without tipping it over) to let the last drops out, if necessary.
  5. Replace the drain plug (and gasket/O-ring)
    • Inspect the plug and its gasket or O-ring. Replace the gasket if it’s worn or damaged to prevent leaks.
    • Reinstall the drain plug, tightening with your torque wrench to the manufacturer’s specification (see owner’s manual for exact torque value).
  6. Remove and replace the oil filter
    • Locate the oil filter cover (usually on the right side of the engine).
    • Remove the cover bolts with the appropriate socket or wrench.
    • Pull out the old oil filter and O-ring (replace the O-ring if it appears worn).
    • Prime the new oil filter by adding a small amount of oil and “wetting” it—this prevents a dry start.
    • Install the new filter and re-secure the cover, tightening bolts to spec.
  7. Add new oil
    • Find and remove the oil fill cap/dipstick.
    • Using a funnel, pour in fresh oil up to the recommended level (refer to your owner’s manual or the dipstick for an exact fill line, but generally just under 1 qt for the engine side).
    • If you’re also changing the transmission oil, repeat for the other compartment. Some CRF450X owners fill the transmission with slightly more (up to 950ml) for added protection, but do not overfill the engine side.
  8. Check for leaks and verify oil level
    • With the bike on level ground, start the engine and idle for 1–2 minutes. Shut off and let sit for a minute, then re-check the oil level via the dipstick or sight glass and add more if needed.
    • Inspect under the bike and around the fill/drain locations for leaks. Tighten as needed.
  9. Reinstall skid plate
    • Install the skid plate and torque bolts to the specified settings.
  10. Dispose of used oil and filter properly
    • Bring used oil and the old filter to a local recycling center or automotive store that accepts hazardous waste recycling.

Tips for Owners of the 2019 CRF450X

  • If you routinely ride in harsh conditions or race, change the oil more often than the standard schedule.
  • Always replace the drain plug gasket with each oil change to avoid leaks.
  • It’s recommended to use oil that meets JASO MA specifications for wet clutch compatibility.
  • A pan with a large opening is helpful to handle the Mess-Prone drain plug design.
  • Check your owner’s manual for any updates or Honda service advisories for your specific model year.

Changing the oil in your 2019 Honda CRF450X is straightforward, but staying meticulous with these steps will ensure top performance and long-term reliability for your dirt bike. For all your Honda oil change supplies and parts, MotoSport.com is your source for trusted gear and expert help.

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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.