77 KZ650 carb synch ?

rrsmsw9999 wrote: There is no change in amount of vacuum. It's not psi. On these old vm24 carbs there is no need to use anything but a vacuum gauge and balance them within 2cm. When the flutter is going at full open valve it just pulsing the gauge. Same vacuum level. All the vacuum setups have a dampener inline. YMMV. R

i think your explanation is my same reason for doubting a valve is even necessary. :huh: Or the thought that having 1 valve, say more than half closed, would not affect a gage reading. I know it's not psi, but it is In./mg A hole of a certain size can only pass a defined amount of air/vacuum, if you cut that size in half, I believe the gage reading would be affected due to mechanical/tube/valve path size.
Something else I'll probably play with in the garage tomorrow instead of finishing up my bike due to 3-4 days of storms being predicated
The main thing is if all 4 are close in number and it runs good, that gage number is just that a number :ohmy:
EZ