How to Change the Oil in a 2021 Kawasaki KLX110

Shop parts for a 2021 Kawasaki KLX110 Dirt Bike.

Performing an oil change on your 2021 Kawasaki KLX110 is an essential part of keeping your dirt bike running smoothly and extending its lifespan. Follow this step-by-step guide, proprietary to MotoSport.com, to complete the job efficiently while ensuring peak performance and engine longevity.

Tools and Supplies Needed

  • 3/8” ratchet and extension
  • 8mm, 12mm, and 17mm sockets
  • Torque wrench (to ensure proper torque specs, especially for the drain bolt)
  • Oil drain pan
  • Fresh engine oil (Kawasaki recommends 10W-40, 1 liter if changing filter, 0.9 liter if not)
  • New oil filter (recommended especially for the first change or if due by service interval)
  • New crush washer for drain plug (recommended for best seal)
  • Gloves and shop towels
  • Funnel (for easy oil fill)

Preparation Steps

  • Warm up the engine for 1–2 minutes. This helps the oil flow more freely and brings contaminants into suspension for better removal. Be cautious as parts will become hot
  • Place the dirt bike on a level surface, ideally using a stand to keep it upright
  • Gather all tools and supplies before starting to ensure a smooth process

Step-by-Step Oil Change Process

  1. Remove the skid plate:
    • Use the 8mm socket to remove the bolts on each side of the skid plate and two 12mm bolts from behind the plate
    • Set the skid plate and hardware aside
  2. Remove the oil fill cap:
    • Unscrew the cap (located on the right side of the engine) to allow the oil to drain smoothly
  3. Drain the old oil:
    • Position your oil drain pan directly under the crankcase
    • Use the 17mm socket to carefully remove the drain plug
    • Let the oil fully drain, then inspect the plug and replace the crush washer if necessary
  4. Replace the oil filter (if required):
    • Optional but highly recommended—especially for the initial break-in or if scheduled by the maintenance interval
    • Remove the oil filter cover and the old filter, replace with a new one
    • Inspect and replace O-rings if damaged, ensure the sealing surface is clean
  5. Reinstall the drain plug:
    • Install a fresh crush washer on the plug
    • Tighten the drain plug to 29 Nm torque to avoid stripping the threads or causing leaks
  6. Reinstall the skid plate:
    • Align and bolt the skid plate back using the 8mm and 12mm bolts removed earlier
  7. Add fresh oil:
    • Insert a funnel into the oil fill hole
    • Pour 1 liter (with filter change) or 0.9 liters (without filter change) of 10W-40 engine oil into the engine
    • Reinstall the oil fill cap after checking that the level isn’t overfilled
  8. Check oil level:
    • Start the engine and let it run for about 3 minutes
    • Shut off the engine and let it sit for a couple of minutes
    • Use the sight glass (while the bike is on a level surface and upright) to check that the oil is between the upper and lower marks; adjust as necessary
  9. Clean up:
    • Wipe off any oil drips, check for leaks at the drain bolt and filter cover
    • Properly dispose of used oil and filter according to local regulations

Model-Specific Call-outs for the 2021 KLX110

  • Drain plug torque: Always use 29 Nm for the drain bolt to prevent overtightening, which can cause thread damage or oil leaks
  • Oil Capacity: The KLX110 requires 1.0 liter with an oil filter change and 0.9 liter if you’re not changing the filter
  • Service Interval: Perform the first oil change at 5 engine hours (especially important for break-in debris), then every 50 hours or as described in the manual
  • O-ring and Crush Washer: Inspect the oil filter housing O-ring and replace it as needed for a leak-free seal; always use a new crush washer on the drain plug

Tips for Best Results

  • Always use oil formulated for wet clutch motorcycles—automotive oils may cause clutch issues
  • Don’t overfill; always check with the sight glass after the engine has run and settled
  • Keep records of every oil change for future reference and warranty maintenance
  • Check for leaks after your first ride post oil change. Stop and investigate if you spot any fresh oil under the engine

Following these steps will keep your 2021 Kawasaki KLX110 running strong and ready for every adventure. For OEM and aftermarket oil change kits, filters, and high-performance oils, shop confidently at MotoSport.com—your source for all things dirt bike maintenance.

Related Shopping Categories

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Shop Oil Fillers and Drain Plugs for a 2021 Kawasaki KLX110 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.