How to Change the Oil in a 2025 Kawasaki KX112: MotoSport.com Step-by-Step Guide
Shop parts for a 2025 Kawasaki KX112 Dirt Bike.
Changing the oil in your 2025 Kawasaki KX112 is an essential maintenance task for keeping your bike’s transmission running smoothly. The KX112 is a two-stroke machine, so the oil you’ll be changing is the transmission (gearbox) oil—not engine oil as in a four-stroke—and understanding this nuance is critical for new owners. Follow this robust, proprietary guide developed for MotoSport.com customers to get the job done right.
Tools & Supplies You’ll Need
- 14mm socket and ratchet
- Oil catch pan/drain pan
- Measuring cup (accurate up to 700 ml)
- Clean funnel
- Rags or shop towels
- Nitrile gloves (optional, but recommended for cleanliness)
- Recommended transmission oil: 10W-40 motorcycle gear oil or a quality 80-weight transmission oil (see Owner’s Manual for brand recommendations)
Special Call-Outs for the 2025 KX112
- No oil filter: The KX112, like all two-strokes, does not have an oil filter, simplifying the change process and reducing costs for regular service. Don’t waste time searching for a replacement filter–it doesn’t use one.
- Capacity: Add exactly 700 ml of transmission oil when refilling. Too much or too little can affect clutch and gear performance.
- Drain bolt location: There is only one drain plug, located under the engine case on the right side—this is universal for KX85, KX100, and KX112 models.
Step-by-Step Guide
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Warm up the bike
- Start your KX112 and let it run for 1–3 minutes. The goal is to get the oil warm—this thins it out and helps it drain faster and more completely. Do not overheat; just bring the case to a warm touch.
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Position the bike securely
- Carefully set the bike on a stable, flat surface using a bike stand. Make sure it won’t tip or move during the oil change.
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Prepare your tools and catch pan
- Slide the oil catch pan directly beneath the engine, under the drain bolt. Put on your nitrile gloves to keep your hands clean.
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Remove the oil fill cap
- The oil fill cap is on the right side of the transmission case. Loosen and remove it. This allows faster, smoother draining and prevents vacuum lock.
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Drain the oil
- Use your 14mm socket and ratchet to remove the drain bolt (single bolt under the engine). Take care, as the oil may be hot.
- Let the oil drain completely–tilt the bike slightly upright if needed to get the last bit out, but always keep the bike stable.
- Inspect the drain plug for metal shavings. A little fine powder is normal; large chunks or an excessive amount could signal internal wear.
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Clean and reinstall the drain bolt
- Wipe the drain plug and sealing surface with a clean rag.
- Check the copper washer or O-ring (replace if damaged).
- Reinstall and snug the bolt–do not overtighten. (Typically 12-15 ft-lbs of torque, see Owner’s Manual for specifics.)
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Measure and add new oil
- Use your measuring cup to pour exactly 700 ml of recommended transmission oil into the clean funnel and into the fill port.
- Pause halfway to allow the oil to settle and avoid spills.
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Reinstall the fill cap
- Make sure the threads are clean and the cap seats smoothly. Tighten it securely by hand.
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Check for leaks and clean up
- Wipe down any oil residue near the drain bolt and fill cap. Start the bike and let it idle for 1 minute. Inspect for drips from the drain bolt or fill area.
- Dispose of the used oil properly at a recycling facility or auto parts store collection site.
Additional Maintenance Tips for 2025 Kawasaki KX112 Owners
- Change your transmission oil every 3–5 hours of ride time or after every race—frequent oil changes help extend clutch life and reduce wear on gears.
- Do not overfill or underfill the transmission. Use the precise 700 ml measurement for best transmission/clutch performance.
- Only use high-quality, 2-stroke transmission gear oil recommended for performance motocross bikes—never standard engine oil.
Conclusion
With these clear steps, any rider or parent can confidently change the transmission oil in a 2025 Kawasaki KX112 and keep the bike shifting crisply for every ride. For all your parts, fluids, and expert support, trust MotoSport.com—where your next race or ride starts right in the garage.
Related Shopping Categories
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Shop Oil Fillers and Drain Plugs for a 2025 Kawasaki KX112 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.