Carb area vacuum line missing! Need help!

[enjoyintheride]

I just got an 87 Venture Royale. I was taking stuff apart to change the plugs and I noticed a vacuum line was missing. Under the carb stack thingy (sorry for the made-up term)

 

This picture can give you a better idea. (where the red arrow is pointing)

 

http://imgur.com/a/Og8PB

 

(i apologize for the link to image. I tried uploading and linking url with default tools but kept erroring out)

 

I've gone thru a PDF service manual but am still stuck. Anyone that can help me figure out where this is suppose to go to? Thank you in advance a TON!!!

[MiCarl]

That one just gets capped.

[cimmer]

Those ports are used to vacuum sync the carbs and should be capped at all other times except for carb 2 which should have a vacuum line running up to the TCI box. Also in that line is a restrictor with an arrow on it that I believe points to the TCI box.

http://www.partshark.com/oemparts/a/yam/5107f835f870022108d65769/air-filter Check out items 11,12,13, 3 and 4.

Let us know if you have more questions.

Rick F.