How to Change the Oil in a 2019 Kawasaki KX100: Complete Step-by-Step Guide
Shop parts for a 2019 Kawasaki KX100 Dirt Bike.
Keeping your 2019 Kawasaki KX100’s transmission running cool and smooth means regular oil changes. While the process is straightforward, some model-specific tips can help avoid headaches. Here’s everything you need to know—exclusive for MotoSport.com enthusiasts.
Tools and Supplies Needed
- 14mm socket or wrench (fits the drain bolt)
- Socket wrench
- Measuring cup (marked for 700 milliliters)
- Funnel
- Drain pan
- Shop towels or rags
- Replacement oil (10W-40 motorcycle transmission/gear oil is recommended)
- Gloves (optional—keeps your hands clean)
2019 Kawasaki KX100 Oil Change: Step-by-Step Procedure
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Warm Up the Engine
- Start your bike and let it idle for a minute. This thins the oil and helps it drain more completely.
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Position the Bike
- Place the KX100 on a stand so it’s upright and level. This makes draining easier and ensures accuracy when filling.
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Locate and Remove the Drain Plug
- The oil drain bolt is located under the engine, easily accessible, and requires a 14mm socket.
- Set the drain pan underneath, then remove the drain bolt and washer. Allow the oil to drain fully—expect about 700 milliliters to come out.
- Be careful: do not misplace the crush washer, as it helps prevent leaks.
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Inspect the Old Oil
- Inspect the drained oil for any metallic shavings or cloudiness. Dark or milky oil may indicate clutch or internal issues that should be addressed before riding again.
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Replace the Drain Plug
- Reinstall the drain bolt and washer by hand to avoid cross-threading, then snug it with your wrench. Do not overtighten;– the aluminum cases on the KX100 can strip easily.
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Add New Oil
- Using a clean funnel, pour exactly 700 milliliters of your chosen 10W-40 gear oil into the transmission fill port. The fill plug is on the side of the engine, just above the clutch cover.
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Check the Oil Level
- Bring the KX100 off the stand and make sure it’s perfectly upright.
- On the case near the oil fill, there’s a small indicator notch. The oil should come just up to the bottom edge of this notch–no higher, no lower.
- If the level is off, add or remove oil until it’s right on the mark.
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Reinstall the Fill Plug
- Hand-tighten the fill plug, ensuring the threads are properly aligned.
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Clean Up and Double-Check
- Wipe away any spilled oil and check beneath the drain plug for signs of leakage.
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Run and Re-check
- Start the engine and let it idle for another minute. Turn off and re-check the oil level, topping off if necessary.
Model-Specific Notes and Cautions
- Oil capacity: Both the 2019 KX100 and the KX85 use exactly 700 milliliters of oil. Overfilling can cause transmission drag or leaks; underfilling risks clutch and gear damage.
- Drain bolt torque: Be especially cautious not to over-tighten. The drain bolt threads in the case are easily stripped if you use excessive force. Snug-tighten and check for leaks—if you see drips, try replacing the washer before tightening further.
- Oil type: Use motorcycle-specific gear oil (such as 10W-40). Do not use car oil or 2-stroke premix—these will not protect the KX100’s transmission and clutch properly.
- Oil change interval: Factory service intervals call for a change every 3–5 hours of riding or after every race if you’re pushing your bike hard. More frequent changes keep your clutch and gears running smooth.
- Clutch cover mark: Double-check the oil level with the bike standing perpendicular to the ground and aligned with the clutch cover’s indicated notch for accuracy.
Why Change Your KX100’s Oil Regularly?
- Transmission oil in two-strokes like the KX100 lubricates the clutch and gears only, not the piston. Fresh oil ensures smoother shifting, longer clutch life, and peace of mind on your next ride.
Pro Tip for 2019 KX100 Owners
- If you notice the oil looks cloudy, milky, or gray, inspect the water pump seals and clutch plates. Contaminated oil can damage the transmission quickly.
Changing your 2019 Kawasaki KX100’s oil is quick and easy, yet it’s the single best way to keep your transmission and clutch protected for every ride. Stick to the recommended capacity, use a quality oil, and never over-tighten the drain bolt—and your KX100 will thank you with reliable power and smooth shifting, ride after ride.
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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.