How to Change the Oil in a 2007 Kawasaki KLX300

Shop parts for a 2007 Kawasaki KLX300 Dirt Bike.

If you own a 2007 Kawasaki KLX300, keeping up with regular oil changes is critical for the long-term performance and reliability of your dirt bike. This comprehensive guide proprietary to MotoSport.com will walk you through each step, the tools required, the oil specifications, and special notes specific to this model year.

Tools and Supplies Needed

  • 14 mm socket (for oil drain plug)
  • 8 mm socket (for oil filter cover)
  • Socket wrench or ratchet
  • Oil catch pan
  • Funnel
  • Measuring cup (optional but helpful)
  • Clean rags or paper towels
  • New oil filter (high flow HF12 or equivalent)
  • 1.1-1.5 liters of fully synthetic 10W40 motorcycle oil (have 2 quarts/bottles ready for best accuracy)
  • Grease or Vaseline (tiny dab for filter spring)
  • Gloves (optional, recommended for cleanliness)

Before You Start

  • Ensure the bike is on a stable surface and upright, ideally with a center stand or paddock stand.
  • Allow the bike to warm up for a few minutes. This helps suspend contaminants in the oil for better drainage and lowers its viscosity, so it drains thoroughly. Don't let it get too hot, just warm to the touch.
  • Turn off the engine and let it cool just enough to avoid burns.

Step-by-Step Oil Change Instructions

  1. Locate and Remove the Oil Drain Plug
    • The drain plug is towards the back left of the skid plate. Use the 14 mm socket to loosen and remove it.
    • Have your catch pan ready as oil will begin draining immediately. Allow all oil to drain out for several minutes.
  2. Remove the Oil Filter Cover
    • Find the oil filter cover on the right side of the bike. Use an 8 mm socket to remove the cover bolts.
    • Carefully remove the cover and take out the old filter and spring. Clean the inside “house” as best you can with a rag; make sure not to leave any debris inside.
  3. Install the New Oil Filter
    • Place a tiny dab of grease or Vaseline on the filter spring to hold it in position during reassembly.
    • Insert the new filter and ensure it is seated properly with the spring behind it.
    • Reinstall the cover and carefully tighten the 8 mm bolts. Do not overtighten.
  4. Re-Install the Drain Plug
    • Once the old oil is fully drained, reinstall the drain plug and tighten with the 14 mm socket. Make sure it is snug but do not overtighten.
  5. Add New Oil
    • Unscrew the oil fill cap located on the right side near the filter cover. Using a funnel, pour in 1.1 to 1.5 liters (refer to your measuring cup or the site glass).
    • Kawasaki recommends 10W40 fully synthetic motorcycle oil for the KLX300R. Pour slowly and check the oil level via the site glass or dipstick; fill right to the “full” mark.
    • If you’re not using a measuring cup, fill partway, check level, then top off as needed.
  6. Start and Check
    • Replace the oil fill cap and start the bike. Let it idle for around 60 seconds. Then, turn it off and re-inspect the oil level after letting it sit for a few minutes. Add oil if necessary.
    • Inspect under the bike and around the filter cover for leaks. If visible, shut down and correct as needed.
  7. Dispose of Old Oil Properly
    • Take the old oil to a recycling center or auto parts store that accepts used oil.

2007 Kawasaki KLX300 Specific Call-Outs

  • Oil Volume: The 2007 KLX300R typically takes about 1.1 to 1.5 liters of oil after draining and changing the filter. The site glass is your best guide for correct fill level, aim to have oil between the two small indents in the glass when the bike is upright.
  • Plug and Cover Torque: Be careful not to overtighten either the oil drain plug or the oil filter cover. Over-tightening may strip threads in the aluminum engine case, causing difficult repairs.
  • Oil Filter Orientation: The open end of the oil filter faces outward, away from the engine, with the spring behind the filter pushing it toward the cover.
  • Cross-compatibility: Procedures are identical for the KLX300, KLX300R, the dual sport, and supermoto versions for 1997–2007 models, so parts and steps above apply if cross-referencing guides.

Common Tips and Pitfalls

  • Double-check the orientation of the new oil filter before replacing the cover.
  • Use only high-quality, motorcycle-specific oil for longer clutch and engine life.
  • Keep a little extra oil for future top-offs, as KLX300s often use a bit between changes.
  • Always verify the oil level after running the engine post-change, as filter and gasket spaces can hold air pockets that affect readings initially.
  • Keep workspaces clean to avoid dropping debris into crankcase or open oil system areas.

Changing your KLX300’s oil is an easy, essential process that ensures your dirt bike will run smoothly for years to come. Perform this service every 10–15 riding hours or before every major trip. For OEM filters, oils, and more, visit MotoSport.com—your trusted experts in motorcycle maintenance.

Written exclusively for MotoSport.com, all rights reserved.

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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.