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Water leaking from water pump

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When I start my bike from cold water drips out from the water pump vent hole in the casting. This water stops after 1 or 2 mins. and does not leak again until the next time.

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Hmmmmm, sounds like the outer seal is going. The seal is inexpensive and only takes 30 minutes to replace (if that).

Pull the water pump cover off, remove the impellar, gently pry out the old seal. Install new seal and gently seat it to the back of the housing. Reassemble and torque the cover bolts to spec. I had the same problem on my old YZ.

Good luck.

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