Why the F7 and not some other e-tube? Did you ever try any others?
--louis
The carbs came with f7, 37mm, 130 main, 120 air, 120/70 idle out of the box. Back then, not many folks knew much about changing jets around. Those 70 idles were extra "smogy"...if you sat at a light too long, things would start to load up quick.