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17 yzf 450 puking coolant out overflow

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How long was it sitting idling? Does it happen as soon as you start it? Are you riding trails or what? Puking coolant means it is overheating or the rad cap is bad. If it happens as soon as you start it you probably just need a new cap because the spring or seal is broke.

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You likely let it idle too long or are riding slower trails. 

You could dump the stock coolant out and go 70/30 coolant to water which will raise the boiling point. You could also use a slightly higher pressure cap on the radiator. 

 

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20 hours ago, smiley282 said:

yzf 450  puking coolant out overflow  the bike is brand new any iideas?

Is the bike laying on its side?

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I have had the same issue if I let it idle for too long or drive really slowly. I've read 450's sometimes tend to do that. I installed a Boyesen waterpump yesterday and ordered a high pressure cap. Hope I won't have the same problem anymore.

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Boiled off an entire radiators worth of coolant on my 13' 450 riding the craziest single track trails in Georgia. Got off the trail and never knew a bike could sound like a tea kettle, whistled so loud. Rode it back on one radiator of coolants worth and still rode strong until the day I sold it.

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