Motorcycle Repair: 1985 Kawasaki Ninja 600R (US edition), bike cranks, kawasaki ninja

Question
I just bought the above listed bike and it won't start. This is what I've done so far.
Changed the plugs.
I hooked up the bike to a car battery and the bike cranks fine, but no start. Pulled the tank off and then sprayed starter fluid in carbs-- nothing, just cranking. Pulled valve cover off and pulled plugs. Spark plugs were changed to NGK DE8A. Checked for spark; its a nice blue streak. Even touch it myself and while it was a shock, it wasn't that bad-- not like a car. All plugs had a spark. Now, I didn't check compression, but did insert a wet tissue in each cylinder-- individally, and it pops out upon cranking. Took carbs off and sprayed starter fluid into each of the four intake boots. Nothing, just cranks. The spark from the left coil (#2 & #3 cylinder) is the same as the right coil (#1 & 4 cylinder). What possibly can this be. I ordered a manual but need to wait 10 business days. Help me please. Thanks, Anthony. ant2667@yahoo.com

Answer
Anthony,
Sounds like you are checking the right areas.  I really don't like starting fluid because it can damage plastic/rubber parts (most modern carbs) but it will run a engine for a few seconds.  If you have a good spark, make sure the carbs are clean (carbs work allot better than starter fluid) good gas, air intake is not blocked, exhaust is not blocked...the basics.  I assume it was running when you bought it, if not then you might have some timing/engine problems that require another series of tests.  Hope this helped.