2016 YZ450F Coolant leak/Bad water pump?

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3/26/2020 6:19 PM

Hey everyone,

I started my 450 the other day and let it idle for a few minutes as it was a bit cold out and it hasn't been going in a while. After a minute or two I noticed what looked to be coolant on the stand. Oil didn't look milky in the sight glass and the bike idled fine. Anyone know what could cause this?

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3/26/2020 7:06 PM

Bad water pump seal.

Paw Paw

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3/27/2020 1:03 AM

What Paw Paw said. There will be a bleed hole under the water pump. If the coolant is leaking out the hole, the water pump seal (and possibly the shaft bearing) is bad.

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Many thanks to everyone helping me out this GNCC season: SRT Offroad, Acerbis, FCR Suspension, O'Neal Racing, Evans Waterless Coolants, Rekluse, Twin Air, Braking Brakes, Carbsport

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