Mixture screws

[dug050]

I have a 1996 Royal Star and am getting some popping on deceleration. I want to set the mixture screws and have been reading some posts on the site. I read the write up by Goose and the 3 methods he knows. I am familiar with the "drop idle method" but I think it requires a tachometer that can read in 50 rpm increments, which I don't have.

My question is... Has anybody tried setting the mixture screws using a vacuum guage and adjusting for maximum vacuum like we used to do on automobile carburators ?

Also, do I sync the carbs and then adjust mixture or adjust and then sync ?

 

Enjoying the site, lots of good information and knowledgable people.

Thanks

Doug