air check valve on 00 zx7

[s.carolinakawi]

does the #3 cylinder vac line go to the valve on front of the air box? or where does it go? on that same valve, a short hose comes out the top and goes to the front of the air box. another hose is about 7 inches long and connects to a plastic "t" pipe that connects 2 short hoses to the top of 2 carbs. now, on that valve, where does the other elbow coming out connect to? its two elbows on the left side of that valve but im not sure what connects to the elbow nearest to the valve cover.

[spdrkt ZX7R]

It goes to the vacuum valve that sits underneath the airbox (front towards the front).

I'm not sure what other hose you are talking about so I scanned a page from the Service manual. Hopefully this will answer your question.