912 cruising issue

[Bruce V]

My 1966 has issues when at cruising speed. It feels like it's missing. Have had original Solex carbs rebuilt, new German Bosch spark plugs, wires, and electronic ignition. All the numbers look good on compression and carb function, but it is not happy on the road. Could it be a fuel pump issue? Signed frustrated in Boise.

[JT912]

You’ve confirmed no plugged jets? I sometimes notice a hurky-jerky sensation and read once the early engine mount without the rubber blocks tends to transfer a bit more of the mechanical functions of the car.