Sorry if this has been posted a hundred times but I searched and couldn't find anything.

What size are the carb bellmouths on the intake side please? And if you know the spacing between 1&2 and 2&3 that'd be lovely. My bike is in the shed buried under a Buell so I can't get to it at the mo'.

If you can get to the airbox ... you would be able to measure that.

I think your bike will run better with the airbox and a K+N element, FZRrr's seem to need the snorkel to get them to fuel right.