Joined: Apr 2010
From: Aromas, CA
I Ride: 2018 H2 SX SE, 2005 Z750S, ZX7R Superbikes
I don't know the 89-90 models as well, but from that angle of the pic, it looks a lot like a 91-92 (I am pretty sure I am right on it being at least a 91).
If it starts for a second or two, I am not sure why you need starting fluid. You have proven it is a fuel issue (not electrical). It could be dirty carbs, a rusted tank, vacuum leak or a plugged filter.
A filter is cheap. Open the fuel cap and look inside to see if it is a rusted mess. Check that all the vacuum lines are connected and not cracked. If it is none of those it needs the carbs taken apart and cleaned (and look to see that the carb tops are sealing).
As Garrett mentioned, if you do not know where the difference between the carb throat and the vent tube, you are probably best to either get some help with the carbs or take it to someone that can do it for you. We have all been there. Better to ask for help than screw things up in ignorance. These carbs are simple if you are mechanically inclined and learn the basics.
Not being an ass, just trying to not have you get in too deep and really have a problem that will cost a lot to fix.