carb phenum & carb body seal test - gl1000

[kenai]

Hi All - snowbirded down to AZ and forgot my carb books/video. on above test what is pressure and where was the test point?
memory was 20" and vacuum at the cutoff valve hose??..anyone have this info handy.....thxs kenai

[NCScooter]

I think you plug 3 of the plenum to carb hoses and apply the vacuum to the 4th. 20 is probably fine, I think the ability to hold the vacuum matters more. I'd wait for confirmation on this.