How to Change the Oil in a 1989 Kawasaki KLR650

Shop parts for a 1989 Kawasaki KLR650 Dirt Bike.

Routine oil changes are crucial for maximizing the performance and longevity of your 1989 Kawasaki KLR650. This comprehensive guide from MotoSport.com walks you through every step, focusing on key tips for this classic dual sport motorcycle.

Tools and Parts Needed

  • 3/8” ratchet
  • 17 mm and 8 mm sockets (older models such as 1989 typically use a 17mm drain bolt and 8mm for the filter cover)
  • Torque wrench
  • Oil drain pan
  • Funnel
  • Kawasaki KLR650 oil filter
  • Kawasaki 10W40 oil (2.6 quarts recommended)
  • Gloves and rags
  • New drain bolt crush washer (recommended)

Step-by-Step: Changing the Oil

  1. Warm Up the Engine
    • Start the KLR650 and let it idle for about 3 minutes. This helps the oil drain more easily by reducing its viscosity.
  2. Remove the Oil Filler Cap
    • Turn off the bike. Locate the oil filler cap on the right engine case. Unscrew it to allow air in, aiding in efficient draining.
  3. Drain the Old Oil
    • Place the drain pan under the drain bolt. The bolt is on the very bottom of the engine.
    • Using a 17mm socket, loosen then remove the drain bolt carefully. Retain the crush washer.
    • Allow all oil to fully drain. Rock the bike gently side-to-side to ensure complete drainage.
  4. Oil Filter Removal
    • Locate the oil filter cover (lower right side of engine) and remove its two bolts with an 8mm socket.
    • Carefully remove the cover. Watch for the O-ring; inspect it for damage.
    • Remove the old oil filter. Note the orientation: the steel ring/bezel side must face into the engine when reinstalling.
    • Wipe the filter recess and cover clean of oil and debris.
  5. Install New Oil Filter
    • Coat the O-ring on the filter cover and the new filter with a thin layer of fresh oil for a better seal.
    • Insert the new filter in the same orientation as removed. Replace the O-ring if damaged.
    • Reinstall the oil filter cover, arrow facing up, and hand-tighten the bolts to avoid cross-threading. Torque to manufacturer spec as noted in the service manual.
  6. Replace the Crush Washer and Drain Bolt
    • Install a new crush washer on the drain bolt if possible; it prevents leaks. Thread the bolt back in and torque to spec.
  7. Add New Oil
    • Using a funnel, pour in up to 2.6 quarts of 10W40 motorcycle oil.
    • Screw the filler cap back in securely, ensuring the O-ring inside is intact.
  8. Check Oil Level
    • Start the engine and let it run for 60 seconds, then turn it off and let it settle for a minute.
    • With the bike upright (not on the side stand), check the oil window or dipstick. Add oil if necessary to reach proper level.
  9. Inspect for Leaks
    • Carefully inspect around the drain bolt and filter cover for oil leaks. Tighten as needed.

1989 Kawasaki KLR650-Specific Tips & Call-Outs

  • Old-style filter orientation: Early KLR650 models require the filter to be installed with the metal “bezel” facing into the engine. Incorrect installation may block oil flow and result in engine damage.
  • Side cover O-ring: The O-ring under the oil filter cover can become brittle; replace every oil change if possible to avoid leaks.
  • Drain bolt torque: The aluminum sump threads are vulnerable to stripping. Always torque the drain bolt to specification and avoid over-tightening.
  • Watch for stuck filters: The filter housing tab can get delicate with age—if necessary, use a plastic tool to gently pry the filter cover loose.
  • Oil window checking: 1989 models may have a sight window on the right side; make sure your bike is vertical when checking, as tilting gives a false reading.

Conclusion

Changing the oil on your 1989 KAWASAKI KLR650 is straightforward, requires only basic hand tools, and is key to long-term engine health. Doing it yourself with OEM parts ensures reliability and keeps oil changes affordable. For genuine parts and performance oils, MotoSport.com has you covered.

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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.