Have you had anything done (or done yourself) which involved the airbox being removed and refitted recently? If it's a hesitation as you roll off and back on the throttle at those speeds, I've found that it can be a problem with this not sealing properly (doing the clamps up actually makes them leak).kenty said:On a run from Tees yesterday and noticed (barely) very slight intermittent loss of power at around 75/80mph over or below this speed seemed o.k ....any thoughts.
Had that same problem, false air getting sucked in. This leads to poor running at idle, did not affect higher speed so much though... Only far better mpg, due to far leaner running (which is bad!)Dilbert said:Or check for leaks where the carbs join the engine, these little rubber devils seem to work off with vibration.