Are the bolt patterns (of the 40mm sidedraught carb) the same between the Weber/dellorto vs Solex/Mikuni?

they are the same

I've got a round port twin manifold that fits perfect on the head. As soon as I align the carbs the throttle axle on either carby touch putting one or the other out by about 3.5mm.

So if I bolted one on and then went to bolt the second on, the hole allignment would be out by 3.5mm

What shall I do to get it to fit?

Chris, what carbs are you using? You could trim a bit off the axle and get a thinner nut, got a pic?

Yeah, got a pic just trying to get it up. Hang on......

my solexes did that, just filed a few mm off each threaded end of the throttles til they fit.

so im guessing your using the standard linkages on some solex carbys? and its the link doover between the 2 carbys that is hitting
you will need to trim them down as they werent designed for the carbys being spaced closer together

but if thats not wats happening just ignore what i said

Yeah thats what I was about to do. So this means that the manifold will do the same for all other makes??

Okay here are the images i took a while ago. Sorry guys I don't know how to do the link thing. Worry not just a few extra clicks ; )
Looking at the image they look out by about 5mm, hmmm


http://www.flickr.com/photos/12431623@N06/

EDIT: I have Solexs....