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How to Replace the Coolant in the Yamaha XT 660Z

Model: Yamaha Xt 660
Part: Antifreeze coolant

Video tutorial

This guide explains how to bleed and top up the engine coolant for the Yamaha XT 660 and XT 660Z motorcycles. First, remove the plastic cover on the right side of the bike by unscrewing the fixing screws with an Allen key. Next, unscrew the bleed screw located on the water pump casing, allowing the fluid to drain into a container.

At this point, unscrew the radiator cap and top up the coolant; fill it to the maximum level, then start the engine to circulate the fluid!


Updated on 13 June 2026 by ScegliAuto


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Watch the video!


by ScegliAuto

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