While googling for info on these carbs I came across this:

LINKY

It's an American site, partly about Kawasaki carbs but mostly Harleys. However, it does explain the basic principles of Keihin carbs very well, including the 'start enrichment' gizmo.

HTH,
David

That's a great bit of info. Thanks.

I think those are the carbs on the ZZR too.

Cheers

Mike

It helped me a bit, anyway. It's not exactly the same carbs, but it does show how the Keihin constant velocity system works, and what all the twiddly bits actually do.

But unless it's broken don't twiddle the twiddly bits