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How to Change Oil and Spark Plug on a Yamaha N-Max

Model: Yamaha N Max 155
Part: Checks and maintenance

Video tutorial

In this guide, learn how to change the oil and spark plug on a Yamaha N-Max 155. Remove the oil from the bottom; there is a 19 mm bolt that you need to unscrew. Prepare a container to drain the oil, which you will dispose of at an authorised centre.

Wait for all the oil to drain before replacing the bolt. The new oil should be added from the side, through the cap near the exhaust pipe.

Use a funnel to fill the oil tank with approximately 900 ml of SAE 20W50 oil; then check the oil level. Now, change the spark plug: remove the side cover on the right side; the spark plug is located on the left side of the screen, in a dimly lit but accessible area.

Remove it and replace it easily; then refit the cap and cover, and you’re done.


Updated on 26 September 2026 by ScegliAuto


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by ScegliAuto

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