Mmmmmm nice bike...well worth re-commissioning. You still got all the lycra too?
Sadly my decent bikes went years ago...I now rely on a Trek.
The engine in the 4/4...which hails from over the Pond...is a Cosworth BDG bored to 2100cc with twin Weber DCOE 482, giving 240bhp and redlining at 10k!
I've often wondered the situation of replacing a modern efi engine with a much earlier carb engine regarding emissions etc.
You should come up to RaceRetro at Stoneleigh next month where you can ogle such engines to your hearts desire!!
