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Join Date: Nov 2007
Location: Chandler, Arizona
Those are not vacuum ports, they are carb float bowl vents. They need to be left open ended. Put a longer hose on them and run them down under the bike.
Those ears are one of the things I love about the Vulcan 750. The give it that classic 1980s Japanese cruiser look.
If you do decide to get rid of those parts, they can bring a pretty penny on eBay. Wrap them in plastic and store them in a cardboard box. No need to save any emissions parts, nobody wants those. I did save all the hoses. I have used pieces of those on other vehicles a couple of times.
I am a motorcyclist, NOT a biker.
1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike