D my A12 weight was less coolant (obviously) but with oil. Keep in mind that the Keihin carbs are very light as is the custom manifold. Don't know how much lighter the header is than cast iron exhaust biut I'd say 7-10lbs?? (don't have one around) Also I have a 7lb lighter than stock flywheel and maybe 3-4lbs of other bits taken off.

Tom