I'm having trouble diagnosing the problem.
The spark plugs don't look great, but not horrendous. I'll replace them.
When I try to start it, if I place a rag in the exhaust, it gets blown out (compression, although not a valid test). It does smell of gas (combusted?) so there should be gas arriving to the plug.
The air filter is fairly unclogged.
So it appears I have air - actually haven't check idle air flow.
There appears to be gas.
I'll change the spark plugs to ensure that's not the issue.
Any suggestions on what to explore next?
Hey there, I know its a shot in the dark but...
I had a similar problem with mine not too long ago. I tore it all down, put the injectors on a 9V and made sure they activate, checked each plug to make sure i saw spark on all of them and charged the battery up to FULL, and finally was pouring fuel directly into the throttle bodies through the airbox.
When I put fuel in the airbox, and tried to start - the bike ran, and continued to run until it ran out of fuel that I poured in (like 5 seconds max).
The fuel pump was spinning up, and everything sounded "normal" during a good startup.
When i disconnected the fuel lines from the tank, it seemed like the lines were pressured up, so I was so f'ing confused, it seemed like I had air, fuel, spark - so WTH.
Finally (BIG BIG thanks to DeCosse for hanging in there with me) I gave up and trailered the bike to a shop.
Whether it was true or not, the mechanic said the fuel pressure regulator inside the tank had failed, and the pump was priming up the fuel lines, but as soon as the injectors needed the fuel, the pressure would drop to well below operational pressure needed, and the lines would depressurize, and it would not be enough to spit fuel into the cylinders.
Anyways, thats my story. I hope somehow it helps.