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Join Date: Nov 2007
Location: Chandler, Arizona
It's all going to depend on the connection between the ear and the airbox. The ears have square holes in the back, properly sized to allow the right amount of air through, assuming you have both ears. If you use just one, you will have to find a way to double the airflow through it. The square hole can be enlarged, but if the duct between the ear and the airbox is too small, it won't work. It will cause the bike to run really rich, and lose a lot of power. Would be like running it with the choke on.
There is another way you could do it, but I don't recommend it. The "ears" bolt on by themselves, without being connected to the airbox. You could do the full "earshave" then just leave the one ear on for looks. The problem with that is to do an earshave, you have to use pod filters that attach directly to the carbs, and they don't even come close to filtering as well as the stock filters do. They will allow a lot more dirt to be sucked into the engine, reducing engine life. Most everyone who does the earshave thing knows this, and doesn't care. They must be trying to make the Vulcan 750 become extinct as soon as possible. I want mine to last as long as possible. I bought it new, paid a new price for it, plus put a lot of genuine Kawasaki accessories on it. From a financial standpoint alone I need it to last as long as possible, but as a professional mechanic, it offends my sensibilities to intentionally damage something, especially something that cannot be replaced. They quit making the Vulcan 750 in '06, and despite it's incredibly long production run, they apparently didn't sell that many of them. I rarely ever see one, and everybody wants to know what mine is. When I tell them, they still don't have a clue. It's amazing how many long time riders don't even know Kawasaki made a Vulcan 750. They all know all about the Yamaha Virago, but not the Vulcan. When you tell them the bikes were very similar, they just walk away shaking their heads.
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