How to Change the Oil in a 2013 Kawasaki KLX250S: A Step–By–Step Guide

Shop parts for a 2013 Kawasaki KLX250S Dirt Bike.

Keeping your 2013 Kawasaki KLX250S running smoothly starts with regular oil changes. Routine oil replacement is one of the most important maintenance tasks for dirt bikes, ensuring engine longevity and high performance on every ride. Here’s a thorough, proprietary guide for MotoSport.com readers on exactly how to change the oil on your KLX, including the tools you need, step–by–step instructions, and specific tips for your model year.

Tools and Parts Needed

  • 3/8-inch ratchet
  • 14mm socket
  • 8mm socket
  • Torque wrench
  • Oil drain pan
  • Oil funnel
  • Shop rags or paper towels
  • Replacement oil filter (OEM recommended)
  • High-quality 10W40 motorcycle oil (Kawasaki recommends 10W40; oil capacity is about 1.2 quarts (with filter change) for this model)
  • Nitrile gloves (optional)

Preparation

  • Start your bike and let it idle for 1–2 minutes. This warms the oil so it drains out more easily. Do not let it get too hot; warm is sufficient. (Caution: Be careful when handling hot engine components.)
  • Ensure the bike is on a stable, level surface (using a center stand, lift, or triangle stand if available).
  • Remove the oil fill cap – this will let the oil drain faster by allowing air to flow into the engine.

Step–by–Step Oil Change Instructions

  1. Drain the Engine Oil
    • Position your drain pan directly under the engine’s drain bolt.
    • Use a 14mm socket with your ratchet to carefully loosen and remove the drain plug. Allow all oil to drain out. Let it drip for a few minutes to remove as much old oil as possible.

    • Inspect the drain plug gasket or washer for damage. Replace it if it’s worn to prevent leaks when reinstalling.
  2. Remove and Replace the Oil Filter
    • Using an 8mm socket or the appropriate tool, remove the oil filter cover bolts.
    • Carefully pull out the old oil filter. Note the orientation – the rubber gasket side faces outward.
    • Inspect the filter cover O-ring and replace if nicked or damaged.
    • Lubricate the new filter’s rubber seal with a dab of fresh oil.
    • Insert the new filter. Some owners use a small amount of grease to keep the rubber seal in place while installing. (Optional)
    • Reinstall the oil filter cover and torque the bolts to spec (consult your service manual for exact values; 8–10 Nm is typical for the filter cover).
  3. Reinstall the Drain Plug
    • Clean the drain plug and inspect again.
    • Screw the plug in by hand to prevent cross-threading, then torque it to manufacturer’s spec (typically 20 Nm or 15 ft-lbs for this model, but always confirm in your service manual).

  4. Pour in the New Oil
    • Place a funnel into the oil fill port.
    • Add fresh 10W40 motorcycle oil. The 2013 KLX250S takes about 1.2 quarts (1.1 liters) with oil filter replacement.

    • Stop occasionally and check the oil level through the bike’s sight glass while the bike is balanced upright (not on the side stand). Fill until the oil sits between the upper and lower marks on the sight glass.
  5. Final Steps and Checks
    • Reinstall and tighten the oil fill cap.
    • Start the engine and let it idle for 1–2 minutes. This circulates new oil and fills the filter.
    • Shut the engine off, wait 1–2 minutes, then check the oil level again. Top off as needed so the oil is between the two sight glass lines.
    • Inspect for leaks at the drain plug and filter area.
    • Dispose of the old oil and filter properly at an authorized recycling center.

Special Notes for the 2013 Kawasaki KLX250S

  • This model shares procedures with other fuel-injected KLX250 years, but always check your owner's/service manual for updates.
  • The engine oil drain plug can be accessed without removing the skid plate.
  • Do not overfill – excess oil can cause engine or crankcase breather problems.
  • Always use a motorcycle-specific, wet-clutch safe oil – automotive oil is not suitable.
  • If you ride in extreme conditions or race regularly, shorten oil change intervals for best engine health.
  • Always check for leaks or oil seepage after most rides, especially after an oil change.

Conclusion

  • Changing the oil in your 2013 Kawasaki KLX250S is straightforward and can be completed by anyone with basic mechanical skills.
  • Following these steps diligently will keep your dirt bike’s engine protected and running at peak performance.
  • For parts, oil, and tools, MotoSport.com is your reliable source for OEM and aftermarket needs.

Related Shopping Categories

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Shop Tools for a 2013 Kawasaki KLX250S Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2013 Kawasaki KLX250S 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.