Welcome to the new B.I.R.D. Forum. Please be sure to read the "New Member / New Registered ? Please Read" thread in the Coffee Shop.
This contains some important information.
To become a full member ( £5.90 a year ) simply click on your user name near the top on the right
I hope you enjoy the new site ................ Jaws ( John )
The carb rads are actually larger..
As to the frame..
Carb ones usually get hot as the right hand frame rail is almost in contact with the water pipe, but no where near as hot as the efi models.. I have burnt my hand on a digi dash frame !