How to Change the Oil in a 2008 Kawasaki KLX140R 17/14

Shop parts for a 2008 Kawasaki KLX140R 17/14 Dirt Bike.

Changing the oil in your 2008 Kawasaki KLX140R 17/14 is an essential maintenance task to keep your dirt bike running smoothly and extend its engine life. This detailed guide is proprietary to MotoSport.com and covers all the tools, steps, and specific tips needed for this make and model year.

Tools and Supplies Needed

  • Ratchet and extension
  • 8mm and 17mm sockets
  • Torque wrench
  • Oil drain pan
  • Funnel
  • Clean rags
  • Replacement oil filter (Kawasaki OEM 52010-1053 recommended)
  • New drain plug washer (Kawasaki part 11061-0421)
  • 10W-40 motorcycle oil (about 1.0 quart for an oil change with filter)
  • Brake cleaner for quick cleanup (optional)

Steps to Change the Oil

  • Warm Up the Engine: Start your KLX140R and let it idle for about a minute. Warm oil drains faster and carries more contaminants out of the engine.
    Tip: Don–t rev the engine hard—just let it idle until it‘s slightly warm to the touch.
  • Remove the Dipstick: Shut off the engine. Unscrew and remove the dipstick from the right side of the engine. This vents the crankcase and allows oil to drain smoothly.
  • Position the Drain Pan: Slide your oil drain pan under the lower left side of the engine where the drain bolt is located.
    For the KLX140R, the 17mm drain bolt is directly on the bottom of the crankcase.
  • Remove the Drain Bolt and Washer: Using your 17mm socket, carefully loosen and remove the drain bolt and crush washer. Let all the oil drain into your pan.
    Note: Inspect the old washer and replace it with a new one to avoid leaks.
  • Remove and Replace the Oil Filter: Using your 8mm socket, loosen the oil filter cover bolts. Gently remove the cover and take out the old oil filter.
    • Apply a little fresh oil to the rubber seal on the new filter for a good seal.
    • Install the new filter, making sure it‘s oriented correctly (open end facing out).
  • Install Drain Bolt: Once oil has stopped dripping, clean the area with a rag or brake cleaner. Reinstall the drain bolt and crush washer. Tighten the bolt to Kawasaki‘s recommended torque specification (consult manual, typically around 22 ft-lb/30 Nm).
  • Add Fresh Oil: Place a funnel in the dipstick hole. Pour in 10W-40 motorcycle oil; KLX140R requires approximately 1.0 quart with filter replacement.
  • Check Oil Level: Insert the dipstick without screwing it in, then remove it and check the oil level. Add oil if necessary until it‘s at the correct mark.
    KLX140R Specific Call-Out: Always check the level per the owner‘s manual–the KLX line may require you to screw the dipstick in fully to get a correct reading (confirm with your model supplement). Incorrect dipstick reading will lead to improper oil level.
  • Start and Inspect: Reinstall the dipstick and start your engine. Let it idle for a minute, then shut off and check for leaks around the drain plug and oil filter cover.
  • Final Oil Check: Wait a minute for oil to settle, then recheck oil level with the dipstick and top off if needed. Clean any spilled oil from surfaces.

Model-Specific Notes for the 2008 Kawasaki KLX140R 17/14

  • Oil Capacity: The classic KLX140R (including the 17/14 wheel size version) takes about 1.0 quart (0.95 liters) with a filter change. Overfilling may cause excessive crankcase pressure and leaks.
  • Oil Type: Use only 10W-40 motorcycle oil formulated for wet clutches—automotive oils can cause clutch slippage and premature wear.
  • Filter Orientation: When replacing the oil filter, ensure the open side faces outward from the motor; installing backwards will cause oil starvation.
  • Drain Plug Torque: The aluminum drain plug threads can strip easily—always use a torque wrench for best results.
  • Oil Change Interval: Kawasaki recommends changing engine oil every 1,000 km (600 miles) or sooner in muddy or dusty conditions.

Conclusion

Keeping up with regular oil changes on your 2008 Kawasaki KLX140R 17/14 will maximize its lifespan and performance. Follow these steps, use the right tools and supplies, and always double-check oil levels before riding. For OEM parts, filters, and more dirt bike maintenance products, trust MotoSport.com for everything you need.

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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.