How to Change the Oil in a 2012 Kawasaki KX100 – Complete DIY Guide for MotoSport.com Riders
Shop parts for a 2012 Kawasaki KX100 Dirt Bike.
If you own a 2012 Kawasaki KX100, regular oil changes are one of the most important aspects of keeping your 2-stroke dirt bike running smoothly. Incorrect or neglected oil changes can lead to engine wear, transmission issues, and unexpected breakdowns on the trail or track. Here’s a detailed, proprietary MotoSport.com guide to help you complete this task with confidence and precision.
Tools and Supplies Needed
- 14mm socket and ratchet (for the drain bolt)
- Oil catch pan or drain container
- Funnel (small spout type recommended for bikes)
- Measuring cup or graduated cylinder (metric, for filling precise oil)
- Fresh transmission oil – 700 mL capacity (Kawasaki recommends a quality 2-stroke gearbox oil, like 10W-40 or a specific gear oil such as 75W-80 if riding in hotter climates)
- New drain plug washer (optional, but replacing prevents leaks)
- Cleaning rag
- Bike stand (not mandatory but makes the job easier)
- Gloves for a cleaner job
Preparation Before You Start
- Warm up the bike by idling for a minute. This helps the oil flow out more easily and removes more contaminants from the crankcase.
- Shut the engine off and prop the KX100 securely on a stand or level surface.
Step-by-Step Oil Change Instructions
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Locate and Remove the Drain Plug
- The 2012 KX100 has a single drain plug, located underneath the engine near the left side case. Use a 14mm socket to loosen it.
- Place your drain pan directly beneath the plug. Remove the drain bolt carefully—watch for the washer, which may stick or fall into the oil.
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Drain the Old Oil
- Allow the oil to drain completely. It’s important not to rush this step—give it several minutes for all residual oil to escape.
- Check the drained oil’s appearance. Gray, metallic, or milky oil can indicate internal wear or water contamination—if you see this, further inspection may be warranted.
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Inspect and Clean the Drain Bolt
- While the oil is draining, clean the drain plug and inspect the threads. Check for metal shavings, which may signal transmission or clutch wear.
- Replace the washer if it’s damaged or flattened. A new washer helps ensure a leak-free seal.
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Reinstall the Drain Plug
- Once oil has stopped draining, carefully reinstall the drain plug with the washer. Don’t overtighten—it’s easy to strip the threads in the aluminum case. Hand-tighten first, then give a gentle snug with the socket.
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Measure and Add Fresh Oil
- The correct oil capacity for the 2012 KX100 is 700 milliliters (mL) of 2-stroke gearbox oil.
- Measure out exactly 700 mL with your cup or graduated cylinder. Pour the oil slowly into the fill port on the right side of the engine using a funnel.
- Replace and securely tighten the oil fill cap.
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Check Oil Level
- With the bike vertical and level (off the stand if possible), check the inspection notch or window behind the engine. Oil should be level with the notch or hole.
- If needed, top off a small amount at a time to reach the correct level.
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Clean Up and Final Inspection
- Wipe away any spilled oil and check beneath the drain plug and fill cap for leaks.
- Dispose of the old oil properly at your local recycling or hazardous waste facility.
Model-Specific Call-Outs for 2012 KX100
- Drain Plug Torque: The threads in the KX’s aluminum case are easily stripped – always snug the drain bolt gently and avoid over-torquing.
- Oil Type: Kawasaki recommends 2-stroke transmission oil, but you may use high-quality 10W-40 motorcycle oil in moderate climates. Thicker gear oil (75W-80) is suitable for hotter riding or extended track sessions.
- Oil Volume: It is critical to add no more than 700 mL – overfilling can result in clutch drag and gear shifting issues.
- Inspection: Always check the drained oil for gray or milky appearance, which can signal internal problems like water in the cases or worn clutch plates.
- Frequency: Change the oil every 5-10 hours of riding, or more frequently for racing or extreme conditions.
MotoSport.com Pro Tip
Keep a maintenance log of each service, noting oil type, date, and hours. This helps track performance and can add resale value to your KX100.
With the right tools, supplies, and this MotoSport.com guide, changing the oil in your 2012 Kawasaki KX100 is a quick task that keeps your engine and gearbox running strong 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.