How to Change the Oil in a 2017 Honda CRF450RX

Shop parts for a 2017 Honda CRF450RX Dirt Bike.

Keeping up with oil changes is critical to maintaining the performance and longevity of your 2017 Honda CRF450RX. Below, you'll find a detailed, model-specific guide tailored for MotoSport.com customers. This how-to includes a complete tool list, step-by-step instructions, and critical tips unique to your CRF450RX. Regular oil changes, performed every 15 hours of use or after 6 races, will help keep your dirt bike running at its best.

Tools and Parts Needed

  • 8mm socket and wrench
  • 10mm socket and wrench/ratchet
  • 32mm Allen head (for drain plug)
  • Torque wrench
  • MSR clean funnel or equivalent narrow funnel
  • Oil catch pan
  • Contact cleaner (for cleaning around drain/fill points)
  • Shop towels or rags
  • Oil change kit (includes new oil filter, seal for drain plug, oil filter O-ring, and 2 quarts of oil)
  • Honda 20W-50 or HP4 synthetic oil (per manufacturer's recommendation)
  • New crush washer (should come in your oil change kit)
  • Gloves and safety glasses (for protection)
  • Service manual (recommended for reference and specific torque specs)

Specific Call-Outs for 2017 Honda CRF450RX

  • Unified Oil System: Unlike older models, the 2017 CRF450RX uses a single oil compartment for both the engine and transmission, simplifying oil changes compared to previous years which required two separate fills and drains.
  • Small Oil Fill Port: The fill port on this model is small – a narrow funnel makes the refill process much easier and less messy.
  • No Dipstick: This year/model lacks a traditional dipstick. Instead, use the sight glass on the side of the crankcase to check proper oil level.

Step-by-Step Oil Change Process

  1. Warm Up Your Bike: Start the engine and let it idle for 2-3 minutes. This warms the oil, allowing it to drain more thoroughly.
  2. Locate and Remove the Skid Plate (if installed):
    • Use an 8mm (and possibly 10mm) socket to remove the three bolts holding the skid plate.
    • Set the plate aside and clean off any dirt or debris near the drain and filter areas.
  3. Remove the Oil Filler Cap: Unscrew the cap on top of the engine case. This lets air in and helps the old oil flow out quickly.
  4. Remove the Drain Bolt:
    • Using a 32mm Allen head, unscrew the main drain bolt located at the bottom of the engine.
    • Allow the oil to completely drain into your oil pan. Inspect the crush washer for wear—replace it with a new one from your kit if needed.
    • Wipe the drain area with a shop towel and hit it with contact cleaner to ensure there's no grit or grime.
  5. Remove the Oil Filter:
    • Remove the left side engine guard with a 10mm socket to access the oil filter cover.
    • Take off the oil filter cover bolts using the correct size socket (usually 8mm or 10mm).
    • Pull out the old oil filter and O-ring. Examine them for excess metal or debris, which could indicate internal engine wear.
    • Install the new oil filter and O-ring from your kit.
  6. Replace and Tighten Everything:
    • Reinstall the drain bolt with a new crush washer and tighten to manufacturer spec (refer to your service manual, but typical spec is around 18 lb-ft for the drain bolt).
    • Install the oil filter cover and torque its bolts to about 9 lb-ft.
    • Reattach the engine guard.
  7. Add New Oil:
    • Place a funnel in the fill port and pour in Honda 20W-50 or HP4 synthetic oil. Check your manual or oil change kit for the exact volume (typically around 1.2-1.3 quarts for this model).
    • Let the oil settle for a few minutes, then check the sight glass. The level should be between the upper and lower marks – do not overfill.
    • If needed, add oil in small increments and check the level again.
  8. Check for Leaks:
    • Start the engine and let it idle for 2-3 minutes, then shut it down and do a final check for leaks around the drain plug and oil filter cover.
    • Inspect the sight glass once more — the oil may settle after filling the filter cavity.
  9. Properly Dispose of the Old Oil and Filter: Recycle your used oil and filter at an authorized collection center.

Model-Specific Tips for 2017 CRF450RX Owners

  • The oil sight glass makes checking levels quick and accurate, but always check with the bike level and after allowing the engine to cool for a few minutes.
  • Do not reuse old crush washers—always use a new one to avoid leaks.
  • When refilling, pour oil slowly to prevent overflow from the small fill port.
  • While the oil change kit may include both the oil filter O-ring and drain plug seal, check for proper fit before final tightening.
  • Using genuine Honda filters and oil is highly recommended for optimal performance and warranty preservation.

Final Checks

  • Keep a log of your oil changes to help track maintenance intervals.
  • Inspect for leaks after your next ride to ensure all is tight and sealed.
  • Check the oil level as part of your pre-ride inspection routine.

Following this guide will ensure your 2017 Honda CRF450RX delivers reliable performance and maximizes engine life. For parts, full oil change kits, and supplies, order directly from MotoSport.com.

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Shop Oil Filler and Drain Plugs for a 2017 Honda CRF450RX Dirt Bike.

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.