Fan-like noise

[enGage]

This morning I turned the key to the on position.  The windscreen goes up and the fuel pump hums to life and when all that's done I hear a noise like a small fan running.  I didn't notice it yesterday, but I had the radio off today.  It sounds like it's coming from in or around the fuel tank, but it's too faint to be the fuel pump and it sounds like a fan (it's not the radiator fan, engine was cold and I checked).

Is this normal and if so, what is making the noise?

[cropbiker]

Did you tick the box on the options list for the internal hamster wheel?
 

[enGage]

140 miles today.   Noise is still there.   Sounds like a small fan.   Is the battery compartment ventilated?

[miss]

radio

[enGage]

Originally Posted by miss

radio

That would make sense.  Where is the radio/amp on this bike?

[w8d4it]

Originally Posted by enGage

That would make sense.  Where is the radio/amp on this bike?

I'm missing that one.  Why would it be the radio?

[enGage]

Originally Posted by w8d4it

I'm missing that one.  Why would it be the radio?

I suspect the radio and amp are a single unit (box) and that box might have a small fan to keep it cool.

[miss]

under the seat