How to change the oil in a 2019 Kawasaki KX85 Dirt Bike

How to Change the Oil in a 2019 Kawasaki KX85

Shop parts for a 2019 Kawasaki KX85 Dirt Bike.

Regular oil changes are essential for keeping your Kawasaki KX85 in peak condition, especially for those who ride hard or frequently. Although the KX85 is a two-stroke dirt bike, it still requires regular gear oil changes–distinct from four-strokes, where engine oil and transmission oil are separate. This guide is proprietary to MotoSport.com and is tailored specifically for the 2019 Kawasaki KX85, ensuring you’re equipped with the right tools, steps, and model-specific tips to get the job done right.

Tools and Materials Needed

• 14mm socket and ratchet
• Oil drain pan
• Funnel
• Measuring cup or graduated container
• 700ml of 10W40 gear oil (brands like Yamaha Lube are commonly used)
• Clean rags
• Gloves (optional, for cleanliness)

Step-by-Step Oil Change Guide

1. Warm Up the Bike

   Start the engine and let it idle for a minute. This warms the oil, making it flow more freely and ensuring a more complete drain.

2. Position the Bike

   Place the KX85 on a stand or block to keep it upright and level, giving you better access to the drain plug and ensuring oil drains completely.

3. Drain the Oil

   Locate the drain plug underneath the engine. Using your 14mm socket, carefully loosen and remove the plug, allowing the old oil to flow into your drain pan. Let the oil drain completely–pumping the kickstarter a few times can help expel any remaining oil.

4. Clean and Reinstall the Drain Plug

   Once all the oil has drained, wipe the drain plug and surrounding area with a clean rag to remove any dirt or debris. Reinstall the drain plug and tighten it snugly, but avoid overtightening to prevent stripping the threads. A firm hand-tighten is sufficient.

5. Add Fresh Oil

   Locate the oil filler cap (usually on the right side of the engine cases). Using your measuring cup, measure out 700ml of 10W40 gear oil. Pour the oil into the engine using a funnel to avoid spills. This precise amount ensures proper lubrication without overfilling.

6. Check Oil Level

   After adding oil, remove the bike from the stand and hold it upright. Check the oil level by looking at the filler hole–there is a small notch in the case, and the oil should reach this mark when the bike is level. If the oil is below the mark, add a little more until it reaches the correct level.

7. Secure the Oil Filler Cap

   Once the oil level is correct, reinstall the oil filler cap and ensure it is tight.

8. Dispose of Old Oil Responsibly

   Take your used oil to a local recycling or disposal facility–never pour it down the drain or on the ground.

Kawasaki KX85 (2019) Specific Call-Outs

• Oil Type — Use only 10W40 gear oil designed for motorcycles (such as Yamaha Lube Four Stroke); do not use standard automotive oil or “2-stroke oil” mixed with gasoline, as this bike requires separate gear oil for the transmission.
• Capacity — The 2019 KX85 uses a precise 700ml of oil. Overfilling or underfilling can affect transmission performance and longevity.
• Drain Plug Location — The single drain plug is located on the underside of the engine. Be careful not to confuse it with other bolts on the bike–consult your manual if unsure.
• Oil Level Check — Always check the oil level with the bike held upright. The oil should reach the notch in the filler hole, not just the threads.
• Service Interval — While Kawasaki’s manual states every 3–5 hours of riding (or more often in harsh conditions), frequent riders should consider more regular changes to maintain optimal performance.
• Drain Plug Tightness — The drain plug threads are aluminum, so avoid overtightening to prevent stripping.
• No Oil Filter — The KX85 does not have a separate oil filter, so only the oil needs to be changed.

Conclusion

Changing the oil in your 2019 Kawasaki KX85 is straightforward with the right tools and knowledge. By following these steps and paying attention to model-specific details, you’ll ensure your dirt bike remains reliable and ready for your next ride. For more maintenance guides and MotoSport.com exclusive content, check back regularly for updates and expert tips tailored to your specific make, model, and year.