FI LIGHT COMES ON AND LOSES POWER THEN IT SHUTS OFF THEN FINE

A single dual throat throttle body (fuel injection)

http://www.bikebandit.com/oem-parts/2000-kawasaki-vulcan-1500-classic-fi-vn1500n-throttle/o/m149531sch65727

It could be, but it is more likely to be the ECU (or FI computer) or a sensor that feeds information to the ECU. There is a sensor in the exhaust that check for the correct mixture. You will need a diagnostic machine to test this.

TO ALL VN1500 OWNERS....This once happen to me,
I went to the garage to start the bike "Nothing ""The first thing is the lights are bright but no turning over,Next you think the solenoid is kaput but the answer was very simple and the fix takes 30 seconds..
Do not take the bike to bits looking for other problems and look at the clutch leaver and you will see some wires going into a plastic shroud going into the switch in the clutch leaver, Make sure this has not popped out if its connection as it some times may do after a few years due to constant turning on the handlebars,
When this is not connected you will have a bike that will not fire up but comes alive and you will hear a clicking noise but this is from the engine carb area and every function of the bike will work but it will not turn over, Worth looking at and saves sixteen quid for a starter unit you never needed.

check the glow plugs ( maybe busted ) or the high tension wire..

Ok, locate and check the fuse at the starter solenoide, this is the main power fuse, follow the red battery lead until you locate the solenoide, here you should find under a cover a 30 amp fuse, hope this helps , paul

you need to cut off the grip..

http://www.bike-paint.co.uk/kawasaki%202001.htm

this might have what you are looking for ?

You need to remove the carbs and dismantle them completly and adjust them to spec. Also change the fuel filter.

I have a 2000 Vulcan Nomad FI & had a very similar problem. In fact, it's a very common problem with these bikes. I fixed it by replacing the Clutch Spring. (As Described here: http://www.gadgetjq.com/clutch_spring_replacement.htm

It cost me $40 and 3 hours of time with an impact wrench.