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Join Date: Nov 2007
Location: Chandler, Arizona
No, not the air intakes, those we call "ears". If your bike has air injection, it will be obvious. There will be a huge rubber hose connected to a fitting on the right side of the head on the front cylinder, behind the air filter housing, and another one connected to a fitting on the left side of the head on the rear cylinder. Both these hoses connect to a metal valve under the seat, and there is yet another large hose which connects to this valve, and goes into a hole with a grommet in the bottom of the surge tank, what we call the airbox.
It is an emissions control system that injects air into the exhaust port while the exhaust valve is closed. But it causes backfiring on deceleration, and makes the exhaust run hot. It is fairly common practice in the U.S. to remove this system, plug up the hole in the airbox, and cap of the reed valve connectors on the cylinder heads.
You said parts for this bike are hard to find. Not here. The VN750 was produced from '85 through '06, almost completely unchanged except the '85 model was 700cc, to get under the "Harley tariff" in effect at the time. New parts are easy to get, but they are very expensive, as all Kawasaki parts are here. Genuine Kawasaki accessories are starting to dry up, since this bike hasn't been sold here since '06, and demand for accessories is likely beginning to drop. Jerry.
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