How to Change the Oil in a 2010 Honda CRF450R

Shop parts for a 2010 Honda CRF450R Dirt Bike.

Keeping your 2010 Honda CRF450R performing at its peak requires regular oil changes. This dirt bike uses a separate engine oil and transmission oil system, so each side requires attention. The process is straightforward, but there are specific details you need to get right for this model. Below is your robust, step-by-step guide, proprietary to MotoSport.com, including required tools, expert advice, and 2010 CRF450R-specific call-outs.

Tools and Supplies Needed

  • 10mm socket and ratchet (or T-handle)
  • 8mm socket and extension (for oil filter cover bolts)
  • 10mm hex/Allen wrench (for drain plug)
  • Oil drain pan
  • Replacement oil filter
  • New crush washer or O-ring for drain bolt
  • Funnel
  • Pro Honda GN4 10W-30 4-stroke oil or other high-quality oil meeting API SG or higher, JASO MA
  • Clean rags or shop towels
  • Gloves (optional but recommended for a cleaner job)
  • Skid plate removal tool (if equipped)

STEP-BY-STEP GUIDE

1. Prepare the Bike

  • Warm up the engine for 3-5 minutes. This helps the oil flow and brings debris into suspension for removal

    .
  • If you have a skid plate, remove it using your 10mm socket/hex wrench. There are typically three bolts: one left, one right, one bottom

    .
  • Place the bike upright on a stand.
  • Position your oil drain pan directly below the engine drain plug.

2. Drain the Engine Oil

  • Locate the engine oil drain plug (10mm hex head) beneath the engine, not the transmission side

    .
  • Carefully remove the drain plug. Allow oil to fully drain. Tip: Loosen the oil fill cap on top of the engine for faster draining.
  • Inspect and replace the crush washer or O-ring on the drain bolt to ensure a leak-free seal.

3. Remove and Replace the Oil Filter

  • Use an 8mm socket to remove the three bolts on the oil filter cover located on the right side of the engine

    .
  • Careful: One filter cover bolt may be shorter than the others–note the correct position for reassembly

    .
  • Gently remove the oil filter and note its orientation for proper installation of the new filter.
  • Inspect the spring behind the oil filter (don't lose it.) and clean the cover.
  • Install a new oil filter, making sure it's seated the same way as the old one.
  • Reinstall the filter cover and bolts, tightening them evenly to avoid leaks.

4. Add New Engine Oil

  • Use a funnel to fill with fresh oil.
    • Engine oil capacity (with filter change): 0.62 liter (0.66 US qt)

  • Recommended oil: Pro Honda GN4 10W-30 4-Stroke Oil (or equivalent, API SG or higher; JASO MA)
  • Do not overfill. Add oil slowly and check the sight glass or dipstick (if applicable) to confirm correct level.

5. Reinstall the Drain Plug and Oil Cap

  • Install the drain plug with a new crush washer or O-ring. Hand-tighten, then snug with your wrench (be mindful not to overtighten, as this can strip aluminum threads).
  • Reinstall and tighten the oil fill cap.
  • If you removed the skid plate, reinstall it now.

6. Check for Leaks and Final Steps

  • Start the bike and idle for 1-2 minutes. Check for any oil leaks at the drain plug and filter cover.
  • Turn off the bike, let it sit for a minute, then re-check the oil level. Top up if necessary.
  • Dispose of your used oil and filter responsibly via a local recycling center.

2010 Honda CRF450R-Specific Call-Outs

  • The 2010 CRF450R uses separate oils for engine and transmission. This guide covers the engine side. If changing transmission oil, it requires a similar procedure but uses a separate fill and drain on the transmission side

    .
  • Engine oil capacity with filter: 0.62 liter (0.66 US qt)

    .
  • Do not overfill, as the CRF450R—s compact design means overfilling may cause oil aeration or leaks.
  • Always use oil that meets JASO MA/MA2 specifications to avoid clutch slip and excessive engine wear.
  • Inspect O-rings on oil filter cover and replace if damaged to prevent leaks.
  • Allowing dirt into the engine while changing the filter is a common error—use clean rags to keep the area clean during the process.

Expert Tips

  • Record the date and engine hours after each oil change to track intervals.
  • If riding in harsh conditions (mud, sand, racing), change oil more frequently than the manual—s minimum interval.
  • Use only branded or high-quality aftermarket filters; economy filters may restrict oil flow.
  • Avoid cross-threading drain plugs and always torque to specification if you have a torque wrench.

Regular oil changes are the key to extending engine life and keeping your 2010 Honda CRF450R in optimum racing shape. For all parts, oil, and filter kits, turn to MotoSport.com—your dirt bike authority.

Related Shopping Categories

Shop Motor Oil for a 2010 Honda CRF450R Dirt Bike.

Shop Oil Filters for a 2010 Honda CRF450R Dirt Bike.

Shop Oil Drain Pans for a 2010 Honda CRF450R Dirt Bike.

Shop Tools for a 2010 Honda CRF450R Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2010 Honda CRF450R 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.