250 Ninja fuel tank noise

[FCB104]

Hi any info appreciated on a weird high pitched whistle that the tank makes when stationary running or not. It is more prevelant now it's hot as I assume more pressure from the heat.
It's bloody annoying and was wondering is it a common fault?
Any ideas on how to fix?

[Desmo]

Pressure escaping from your petrol tank. Either loosen the cap for a sec and ignore.
It's not uncommon and not a problem.

[gilly71]

i have heard that pressure builds up in the tank and the whistling sound you hear is the tank releasing the pressure from the fuel.... i think they have a small valve or something on them.....

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Pressure escaping from your petrol tank. Either loosen the cap for a sec and ignore.
It's not uncommon and not a problem.

haha.... i got it right we both must have been typing at the same time

[GIXXEN]

i have heard that pressure builds up in the tank and the whistling sound you hear is the tank releasing the pressure from the fuel.... i think they have a small valve or something on them.....

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haha.... i got it right we both must have been typing at the same time

One does not get it right and type in sequence with thy [MENTION=7104]Desmo[/MENTION]

[GreenMeanie]

The one I know groans all day and night. Sounds like mating calls of frogs.
Was eventually going to check if a breather was blocked or some insect had decided to build a nest in the overflow tube.

[potato]

haha, ive had two or three of those in the workshop at times.

the place sounds haunted

its a "normal" sound for them

[CharlieBrown]

The one I know groans all day and night. Sounds like mating calls of frogs.

Yup - mine does that, sounds like a softly snoring donkey braying quietly to itself. Very odd.

[Dirty32]

My old Ninja had it, from new!
Heard it the first day I took it home, still made the sound the day I sold it.

You'll find it happens more if its parked outside in the sun.
Obviously sun heating the tank, more vapour / pressure to release.

Its normal and becomes somewhat comforting after a while!

[Rich...]

Kawasaki whistle...

They've been doing it for decades...

[I Like ( . Y . )]

There's a write up on the ninja forum for how to drill out the relief hole to make it slightly larger.
Or just open the lid and close it again to get a few hours quiet.

[Chaderotti]

I liked it when I had my ninja. Like a cat meowing.

Funnily enough it used to do it as I got near. Any excuse to ride is a good excuse.

[Darkrhyno]

Normal. It's a Kawa thing. Did it on my 08 250 and my 10 zx6r.

[FCB104]

Ok guys thanks for all the replies I didn't realise it was so common.
Ha it would be funny with 3 going at once as potato said!

[Rosco]

It's just your bike saying "Ride me"

[thro]

All kawasakis I've seen do it.