When I floor the accelerator I get a couple of seconds of a chirping noise from the carbs - any ideas?

1660cc X-flow, roughly 100 BHP
CBR600FX carbs
Home-made airbox/filter
Home-made manifold
Genuine Honda rubber couplers between carbs and manifold

Everything's running well - just wondering it should happen, or if something needs fixing!

Is it more "budgie" or "sparrow"??

Feather the throttle

Where's your mother gone?? Chirpy chirpy cheep cheep



For those of you not old enough it was a song in the late sixties /early seventies by Middle of the road IIRC. Not a lot of help David I know. Possible sharp edge on the air box?

quote:

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Originally posted by Thinking about it
Feather the throttle

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It's fine - just the sudden influx of air at an angle (try blowing across the top of a bottle).

I wish I could hear mine chirping!

[Edited on 3/4/09 by stevebubs]

It does get drowned out by the snarl of the air going into the carbs...

Inlet gasket is acting as a reed....you have a leak!

You've got me wondering know, I've noticed a slight noise like a cheep cheep on mine when I floor it and I kind of thought the fan belt was slipping or alternator bearing was a bit noisy although on the other hand the belt is defo tight enough. Could be the same!

You've got me curious now!!!

Cheers

Rich

As richard K i thought it was just the fan belt of thrust bearing.. it only happens when blipping the throttle at low rpm.

now i'm realy confused

ditch

Some years ago I had some problems with a Datsun I had - yes, a Datsun (for all you younger whippersnappers, they changed their name to Nissan in the '70s).

The car was ok until you got a few revs on - then it coughed and spluttered, and basically said it wasn't going to go any faster.

After much rooting round under the bonnet, I eventually found the culprit - a complete DEAD BIRD wedged in the inlet pipe of the air cleaner!!!

Er - not that this is very relevant to your problem I know........

I have the same after making my own inlet manifold. It must have a very small warp in it that is not taken up by the inlet gasket. If I put my finger on the area I can feel the vibration and the noise stops.

I am going to try another gasket and nip it up again.

HTH