NGPZ - More t'shootin' dies after highway run

David Spaulding spauldingd at
Fri Aug 17 16:20:30 PDT 2007

Steven, here is a great page describing carb icing problems with the Ninja 
250.  It says that carb icing can occur at up to 90 degrees ambient 

I think the reason it would run fine until you stop is that with the 
throttle open you get enough fuel through your main jets, but the smaller 
idle jets can ice up such that it can't idle.  When it dies, it would take 
just a minute or two for the heat from the heads to warm the carbs so it 
runs again.

Dave in Des Moines

----- Original Message -----
From: "Steven Bixby" <steven at>
To: "Kawasaki GPZ1100 discussion" <gpzlist at>
Sent: Friday, August 17, 2007 3:56 PM
Subject: Re: NGPZ - More t'shootin' dies after highway run

> Heh.... it's not THAT cold/damp here, despite Mark Twain's famous
> quote.   It was probably 70-ish and 45% humid when she had it happen
> today.
> The vents/hoses do sound like a possibility, I can clean these out and
> replace the fuel filter.
> I just wonder - if it's running OK as you're droning along, but then
> drop to idle, why would it suddenly not get enough fuel to just idle?
> On 8/17/07, Dave Spaulding <spauldingd at> wrote:
>> Lord knows I'm not a mechanic, but whenever I hear these symptoms, I 
>> think
>> of carb icing or fuel starvation caused by a clogged vent in the gas cap.
>> In San Francisco I wonder if the cold damp air would make you more likely 
>> to
>> have icing problems.

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