How to Change the Oil in a 2010 Kawasaki KLX140R (17/14)

Shop parts for a 2010 Kawasaki KLX140R Dirt Bike.

Keep your 2010 Kawasaki KLX140R running strong by performing regular oil changes. Learn how to do it yourself with this step-by-step guide from MotoSport.com. These instructions include all tools and supplies needed, exact procedures, and call-outs specific to the 17/14 wheel 2010 KLX140R model.

Tools and Supplies Needed

  • Ratchet and extension
  • 8mm socket
  • 17mm socket
  • Oil drain pan
  • Torque wrench
  • Crush washer (replace if damaged or worn)
  • OEM oil filter (highly recommended for best fit)
  • 10W-40 motorcycle oil (approx. 1.2 quarts for this model)
  • Clean rags
  • Funnel
  • Shop gloves

Before You Begin: KLX140R Model-Specific Call-Outs

  • The 2010 Kawasaki KLX140R 17/14 uses a 144cc air-cooled engine with a spin-on oil filter and a dipstick to check the oil level. Drain and fill bolts are easily accessible from the left side of the engine.
    Note: The oil change process is nearly identical for all KLX140 variants from 2010 onward, but always confirm capacity with your owner’s manual to avoid overfilling.
    Oil capacity: 1.2 US quarts (1.15 liters). The most accurate reading is with the motorcycle upright, not on the side stand.

Step-by-Step Checklist: Oil Change Procedure

  1. Warm the Engine
    • Start your KLX140R and let it idle for 1–2 minutes to warm the oil. Warm oil drains faster and removes more contaminants.
  2. Vent the Crankcase
    • Switch off the engine. Remove the dipstick on the engine’s right side. This vents the crankcase and allows oil to flow out more completely.
  3. Remove the Drain Bolt
    • Place your drain pan under the engine’s left side near the bottom of the crankcase.
    • With the 17mm socket and ratchet, loosen and remove the drain bolt. Be careful—the oil may be hot.
    • Remove the crush washer and inspect it. Always replace a damaged or squished washer to prevent leaks.
  4. Drain the Oil
    • Allow oil to drain completely—this may take several minutes. Tilting the bike upright for a moment helps extract the last bit of dirty oil.
  5. Replace the Oil Filter
    • Use the 8mm socket to remove the oil filter cover (on the lower left crankcase).
    • Carefully remove the old oil filter. Dispose of it according to local regulations.
    • Wipe down the sealing surfaces. Install the new OEM oil filter—be sure it’s facing the correct direction (open side facing out).
    • Reinstall the filter cover and torque the bolts according to your manual (typically around 8 Nm/69 in-lbs).
  6. Reinstall the Drain Bolt
    • Reuse or replace the crush washer, then reinstall the drain bolt. Torque to 29 Nm (21 ft-lbs).
  7. Add Fresh Oil
    • Using a funnel, add fresh 10W-40 motorcycle oil through the dipstick opening. Start with about 1.0 quart, then check the level and top off as needed. The correct capacity is 1.2 quarts for most KLX140R engines.
    • Let the oil settle, then check the level by inserting the dipstick (do not thread in). The oil should register between the dipstick’s upper and lower marks with the bike upright.
  8. Check for Leaks
    • Reinstall the dipstick and start the engine.
    • Let it idle for 30 seconds, then check for leaks at the drain bolt and around the oil filter cover. If any leaks are present, shut off the engine and rectify immediately.
  9. Final Oil Level Check
    • Switch off the engine and wait a few minutes for oil to drain into the crankcase. Check the oil level again and add oil if necessary.

KLX140R Tips for a Clean, Easy Oil Change

  • Always use motorcycle-specific 10W-40 oil. Automotive oils may harm clutch plates.
  • Dispose of used oil and filter responsibly—most auto parts stores accept waste oil.
  • Hand-tighten the drain bolt until snug, then finish with a torque wrench. Over-tightening can strip aluminum threads.
  • Running the engine for a minute before draining is critical for removing micro-contaminants, especially on bikes used in dusty conditions.
  • If you suspect oil leaks, inspect filter cover o-ring and replace if brittle or cracked.
  • For break-in service (first few rides on a new engine), oil changes should be performed more frequently, following Kawasaki’s recommendations.

Recommended Oil & Filter for 2010 KLX140R

  • Oil: 10W-40 motorcycle oil, 1.2 quarts.
  • Filter: Kawasaki OEM or high-quality aftermarket equivalent.
By servicing your 2010 Kawasaki KLX140R’s engine oil at recommended intervals, you’ll extend engine life and keep your dirt bike running at peak performance for every adventure. For all OEM filters, crush washers, and premium 10W-40 oil, count on MotoSport.com for fast shipping and expert support.

Ride safe, wrench smart, and enjoy more trails.

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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.