How to Change the Oil in a 2025 Kawasaki KLX300

Shop parts for a 2025 Kawasaki KLX300 Dirt Bike.

This detailed how-to is proprietary to MotoSport.com and specifically tailored for the 2025 Kawasaki KLX300. Regular oil changes are vital for optimal engine performance and longevity, especially on high-revving dirt bikes. Below you'll find every tool you need, each step of the oil and oil filter change, and important notes unique to the 2025 KLX300.

Tools and Supplies Needed

  • 10mm and 12mm sockets or wrenches (for drain bolt and oil filter cover)
  • Socket ratchet and extension
  • Oil catch pan
  • New oil filter (Kawasaki part number 52010-1053 recommended)
  • New engine oil (JASO MA rated, 10W-40; 1.1 quarts)
  • Funnel
  • Clean rags
  • Gloves (optional, but recommended)
  • Torque wrench (optional, but preferred for precision)
  • Replacement crush washer for drain bolt (recommended)

Preparation Steps

  • Warm up the bike for a few minutes to allow the oil to flow more freely and suspend contaminants.
  • Turn the engine off and put the bike on a stable stand.
  • Ensure you are working on a level surface.

Step-by-Step Oil Change Procedure

  1. Locate the oil drain bolt on the underside of the engine. Place the oil catch pan beneath the bolt.
  2. Use your 12mm socket or wrench to loosen and remove the drain bolt. Allow the oil to fully drain–this can take several minutes. Replace the crush washer on the drain bolt if damaged.
  3. While the oil drains, move to the oil filter cover on the right side of the engine. Use a 10mm socket or wrench to remove the cover bolts.
  4. Carefully remove the oil filter cover to access the oil filter element. Note the orientation of the filter and ensure the spring behind the filter does not get lost during removal.
  5. Remove the old oil filter and inspect it for metallic debris. It is normal to see some on the first few changes as the engine breaks in, but excessive material could indicate a problem. Wipe the filter cavity clean using a rag.
  6. Install the new oil filter (ensure the correct orientation–typically the open end faces out). Reinstall any spring or washer as required.
  7. Secure the filter cover and torque the bolts to specification (do not overtighten; hand-snug then a quarter turn is usually sufficient).
  8. Once all oil has drained, reinstall the drain bolt with a new washer. Tighten to the Kawasaki specification (consult owner’s manual or typical spec is 21 lb-ft/29 Nm).
  9. Using a funnel, add 1.1 quarts of 10W-40 JASO MA-rated oil into the oil fill port located on the right side of the engine. Use the sight glass or dipstick to verify the oil level is correct–add oil slowly and do not overfill.
  10. Start the bike and let it idle for a minute. Shut it off and wait a couple of minutes for oil to settle. Re-check the oil level and top off as needed.
  11. Check for leaks at the drain bolt and filter cover. Clean up any spilt oil from the engine and work area.
  12. Dispose of used oil and the old filter at a proper recycling center.

2025 KLX300 Model-Specific Callouts

  • The 2025 KLX300 is fundamentally the same as recent model years for oil change procedures. These instructions apply to Dual Sport, Supermoto, and R versions as well.
  • First service is typically recommended at 600-800 miles, but some owners prefer to change as early as 300 miles during initial break-in for maximum new engine protection. This will remove more break-in debris and particulates, preserving engine life.
    “I like to do mine a little bit early…around 300 miles…then another around 800 or 1,000 miles and then every 1,500 to 2,000 miles after that.”
  • The oil capacity is 1.1 quarts (1.0 liters) for a standard change, which means you’ll use most, but not all, of a two-quart oil package. Be careful not to overfill.
  • The OEM filter part number is 52010-1053; always match to your VIN for confirmation.
  • Before installing the new filter, check/clean any small spring or washer that sits behind the oil filter–do not lose this tiny part during the swap.
  • After the first change, some owners prefer to install a magnetic drain plug to help pick up metallic debris in future changes, which is a proactive upgrade.
  • The 2025 model’s fill cap and drain plug locations have not changed from recent years, and the process will feel familiar to seasoned Kawasaki dirt bike owners.

Final Tips

  • Always warm up your bike before draining the oil–this helps suspend particles and ensures more complete drainage.
  • Double-check your work for leaks after running the engine the first time post-change.
  • Use only JASO MA or MA2 rated oil to protect the bike’s wet clutch system.
  • Properly record your maintenance in a log for warranty and resale value.

Your 2025 Kawasaki KLX300 is now ready to tackle the miles ahead with fresh, clean oil. Change your oil at recommended intervals for trouble-free riding and enjoy the trails with confidence. For OEM parts and more guides, trust MotoSport.com.

Related Shopping Categories

Shop Motor Oil for a 2025 Kawasaki KLX300 Dirt Bike.

Shop Oil Filters for a 2025 Kawasaki KLX300 Dirt Bike.

Shop Oil Drain Pans for a 2025 Kawasaki KLX300 Dirt Bike.

Shop Tools for a 2025 Kawasaki KLX300 Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2025 Kawasaki KLX300 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.