Tuning with vac guage

[BobBrumby]

Gday all

My webberized brumby has a small miss at idle and I tired various items like sparkies, ht leads, cap and rotor to fix it all to no avail. I have not ever touched the air/fuel since i installed it 15k km ago. I recently bought a vac guage for my bike but it only works on my brumby. I was wondering how you to tune it using a vac guage.

 

1. Are you after the most vacuum you can get?

 

2. When you start to run a bit lean does the vacuum reading go down?

 

3. Which way do you turn the weber screw to lean out?

 

Cheers

[naru]

1-Yes

2-Eventually,but,your tachometer is more sensitive.

3-Turn the screw in(clockwise) to lean the idle mixture.