How to change the oil in a 2023 Kawasaki KX450 Dirt Bike

How to Change the Oil in a 2023 Kawasaki KX450

Shop parts for a 2023 Kawasaki KX450 Dirt Bike.

Keeping your 2023 Kawasaki KX450 running at peak performance means routine maintenance. One of the most important tasks you can perform yourself is a regular oil change. MotoSport.com brings you this detailed, proprietary guide for a robust and reliable oil change on the KX450, complete with required tools, step-by-step instructions, and model-specific tips.

Tools and Materials Needed

8mm socket (for oil filter cover)
12mm socket or wrench (for drain bolt)
Torque wrench (recommended for reassembly)
Drain pan (to catch old oil)
Fresh engine oil (10W-40 is recommended, 1.0 quart/0.95L for the oil change)
Oil filter (KN207 or OEM equivalent)
Shop towels or rags
Funnel (for refilling oil)
Flathead screwdriver (for removing filler cap, model-specific)
Gloves (optional, but keeps hands clean and safe)
Skid plate removal tool (as required, see below)

Model-Specific Callouts for the 2023 KX450

The oil filler cap requires a flathead screwdriver to remove instead of a twist-off design found on some other brands.
Be careful not to over-tighten when reinstalling, as the cap threads can strip easily.
Oil capacity: 1.0 quart (0.95L) when changing both oil and filter.
Don't overfill—this model is sensitive to oil level.
Proper checking procedure: Hold the bike level and check the sight glass; aim for oil to fall in the center between the two marks.
If equipped, the plastic skid plate may need to be removed for easier access to the drain bolt. Some aftermarket and OEM plates have an access hole, but removal gives a cleaner drain and prevents oil mess.
Always reinstall skid plate after maintenance.
Drain bolt torque: 10 N·m (89 inch-pounds)
Oil filter cover torque: 12 N·m (106 inch-pounds)
2019–2023 KX450s share nearly identical oil change procedures and requirements.

Step-by-Step Instructions

Warm Up the Engine
- Start the bike and let it idle for 3-5 minutes. This warms the oil for better flow and helps suspend contaminants for thorough removal.
Stabilize the Bike
- Turn off the engine and place the bike in a vertical position, either on a center stand or with help holding it level. This ensures complete drainage and accurate oil level checks.
  Do not perform this task with the bike leaning on its side stand.
Remove the Skid Plate (If Required)
- Use the appropriate tool to unbolt or detach the skid plate if it blocks the drain plug or filter access. Some owners prefer to remove it to prevent oil spills and ease cleanup.
Drain the Oil
- Position your drain pan beneath the engine’s drain bolt (located underneath the engine).
- Use the 12mm socket to loosen and remove the drain bolt.
- Allow oil to fully drain—wait several minutes for thorough drainage.
- Inspect the drain bolt and crush washer for damage; replace if necessary.
Remove and Replace the Oil Filter
- With the oil drained, use an 8mm socket to remove the oil filter cover (located on the right side of the engine).
- Pull out the old filter. Make sure the rubber grommet on the filter does not get stuck inside.
- Install the new oil filter (KN207 or equivalent), noting direction: The side marked "this side towards engine" faces into the motor.
- Lightly oil the new filter’s gasket with a fingertip dipped in clean oil. This ensures a proper seal and prevents damage when tightening.
- Reinstall the filter cover. Tighten to 12 N·m (106 in-lb) using your torque wrench.
Reinstall the Drain Bolt
- Once oil has stopped dripping, reinstall the drain bolt with washer.
- Tighten to 10 N·m (89 in-lb) using your torque wrench.
  Avoid overtightening, as aluminum threads can easily strip.
Add Fresh Oil
- Remove the oil filler cap on the right side of the engine using a flathead screwdriver.
- Insert a funnel and pour in 1.0 quart (0.95L) of 10W-40 motorcycle oil.
- Reinstall and snug up the oil filler cap—do not overtighten.
Restart and Check for Leaks
- Start the engine and let it idle for 1-2 minutes, then shut off and let it sit for 1 minute.
- While the bike is level, check for leaks around the drain bolt and oil filter cover.
- Inspect the oil level via the sight glass. The oil should sit between the two lines. Add oil if low, drain some if overfilled.
Reinstall Skid Plate and Final Inspection
- Reinstall the skid plate securely if removed.
- Dispose of used oil and filter properly according to local disposal regulations.
- Wipe down the engine area and confirm final oil level.

Quick Tips and Reminders for the 2023 KX450 Owner

Use only high-quality motorcycle-specific 10W-40 oil for best clutch and engine performance.
Do not overtighten drain or filter bolts—use a torque wrench.
Always replace the oil filter with every oil change for optimal engine life.
If your bike uses an aftermarket or OEM plastic skid plate, removal makes cleanup much easier.
Check the oil level only while the bike is vertical and on flat ground to avoid inaccurate readings.
Log the oil change date and engine hours for future maintenance tracking.

Trust MotoSport.com for all your OEM and aftermarket oil filters, drain bolt washers, and motorcycle-specific oils. Enjoy your next ride with peace of mind knowing your 2023 Kawasaki KX450 is powered by fresh, expertly-installed oil.

Related Shopping Categories

Shop Motor Oil for a 2023 Kawasaki KX450 Dirt Bike.

Shop Oil Filters for a 2023 Kawasaki KX450 Dirt Bike.

Shop Oil Drain Pans for a 2023 Kawasaki KX450 Dirt Bike.

Shop Tools for a 2023 Kawasaki KX450 Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2023 Kawasaki KX450 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.

How to change the oil in a 2023 Kawasaki KX450 Dirt Bike