2020 Kawasaki KLX140 Oil and Filter Change - Page 1

Applicable to all KLX140 versions from 2010 onwards (see below)

This is a step-by-step guide to changing the oil and oil filter on a Kawasaki KLX140. It is based on the author’s observations and experience changing the oil and oil filter on a 2020 Kawasaki KLX140L and on information contained in the official Kawasaki KLX140 service manual, 2020 (part no. 99924-1390-14) which covers model years 2010 - 2021, and models KLX140A/KLX140/KLX140R, KLX140B/KLX140L/KLX140RL and KLX140C/KLX140G/KLX140RF. The author is not aware of any mechanical changes to the KLX140 models for the model years 2022-2024, so this guide should apply to those as well.

Disclosure: While the author has attempted to provide correct and complete information, sometimes errors or omissions may occur. By using this document and following the procedures and advice below, the user assumes all risk and responsibility for injury or damage to their motorcycle. The author has been servicing motorcycles for many years (not as a profession) and is mostly self-taught (no formal training in motorcycle servicing). It is recommended that you consult the Kawasaki KLX140 owner’s manual and/or service manual.

By learning to change the oil and oil filter, you can save money, learn more about your bike, gain the satisfaction of maintaining your bike yourself, as well as saving yourself a lot of inconvenience. There is nothing technically challenging about the procedure. Use the correct tools and supplies for the job, and take your time. Read all of the instructions before beginning.

Parts, supplies and other items you may need

• 10W-40 motorcycle oil (1.15+ litres)
• new Kawasaki oil filter
• new O-ring for oil filter cover, possibly
• new crush washer for oil drain plug, possibly
• clean funnel for adding oil to engine
• funnel for pouring dirty oil into containers for disposal
• rags and/or shop towels
• disposable gloves (nitrile)
• pan or pail to drain oil into
• newspaper or cardboard to protect floor from spills
• newspaper and tape to redirect oil from oil filter housing once opened

Tools you need or may find helpful

• torque wrench accurate for 8 to 18 N.m
• 3/8-ich drive: 17 mm socket, ratchet and a 3-inch or 6-inch extension for the oil drain plug
• 1/4-ich drive: 8 mm socket, ratchet and a 3-inch or 6-inch extension for the oil filter cover bolts
• possibly a pick or small flat blade screwdriver for removing the oil filter cover O-ring
• possibly a 3/8-inch to 1/4-inch drive adapter for torque wrench or ratchet

Information From Kawasaki KLX140 Service Manual

• Warm up the engine so that sediment will be resuspended and the oil drains easily. Stop the engine.
• Remove the oil filler cap.
• Remove the engine oil drain plug to drain the oil completely.
• Reinstall the oil drain plug with a new gasket, and tighten to 18 N.m (13 ft-lb)
• Remove the oil filter cover bolts and then the cover.
• Remove the oil filter.
• Install a new oil filter with the grommet oiled and facing inwards.
• Replace the oil filter cover O-ring with a new one and apply grease to it.
• Install the spring securely (inner side of cover).
• Install the oil filter cover and tighten the bolts to 8.8 N.m (78 in-lb).
• Pour in the specified type and amount of oil (see above).
• Check the oil level (see below).

Checking The Oil Level (according to service manual)

• If the oil has just been changed, start the engine and let it run for several minutes at idle speed and then stop it.
• If the engine has just been run, wait several minutes after stopping it for the oil to drain down into the engine.
• Position the motorcycle vertically when checking the oil level.
• Remove the oil filler cap (dipstick) and wipe it off.
• Screw in the filler cap (dipstick) completely.
• Unscrew the filler cap (dipstick) and check that the oil level is between the upper and lower marks (cross-hatched area).
• Adjust the oil level if necessary: add oil if low, remove oil if too high.
• Screw in the filler cap completely.

Go to the next page for more detailed instructions and photos.