http://www.ebay.com/itm/HONDA-CB1000- ... d19ea6:g:Kd8AAOSwYIxX5Rbm

and get a manifold made to suit by this infamous mob
http://www.altiss.com/ThrottleBodies.html

buy the carbs on ebay.co.uk send them straight to Altiss
then the finished product ready for tuning posted to you

They are famous in lotus 7 replica and all custom car circles

otherwise Sykine does similar units if hes not flatter than flat out
but they take alot of labour to get right so be prepared for 400 min
yet you can have cheap carbs that sound awesome

I made them back in the 90s using a mig, they were rough outside
but used cheap dremels to get them right on the inside and they
went like the clappers once a bike tuner got hold of them.
The length was important for the street and to clear good headers.
The longest ones 18-20cm made the most torque and sounded awesome

I went from 34mm > 36mm > 38mm back to 36mm for all round
street midrange as it helped the crazy mystery cam it had
It revved like a rotary and many people confused it for one.

heres a 1200cc corsa with big R1 units
https://www.youtube.com/watch?v=tAc0UIRzIsA


These are the carbs I would buy instead of injection
http://i.ebayimg.com/00/s/MTEwMFgxMTAw/z/p0IAAOSwKrxUZM8n/$_35.JPG
http://shop.yoshimura-jp.com/en/product/syousai.php?id=12438







they are preferred over injection for Japanese racing & street bikes
they are easier to setup with power throughout the range
equivalent to efi as they have their own unique multi-hole on
the tapered jets patented design which atomises fuel close
to efi in all modulations. Pure mech tech pricey but still analog!