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[2cvandy]

Actually, having said that, the previous owner didn't do something similar did he? I assume he would have told you if he did but it might be worth checking the side stand loom to make sure there's nothing connected to it? Probably not, as if I remember correctly, I think the side stand switch allows the engine to spin but cuts the spark, (anybody confirm if that's the case?) and you say you have a spark. Sorry if I've added to the confusion,,,,,,,,,,,,,,

[MickB]

Sorry if this sounds a bit obvious but are you following the correct starting procedure (assuming that the engine is spinning over)? I say this because I used to ride bikes with carburettors before getting my Enfield and used the same starting technique, choke, quarter throttle etc, and found that the bike would not start. The EFI needs the bi-starter (choke) fully open, clutch pulled in to release load and NO throttle. If you open the throttle it tends to flood the engine. If the engine is not spinning, have you checked that the engine kill switch by the throttle is in the run position? I managed to accidentally turn it off while cleaning the bike and then spent twenty minutes wondering why it wouldn’t start. Good luck!

[Rattlebattle]

FWIW when my C5 misbehaved the fault diagnosis (according to my reading the short and long flashes) was a faulty crank position sensor. When I took the bike to the dealer he hooked it up to the official DOL fault diagnostic kit used by dealers and it indicated a faulty tps sensor or connection. In fact it was the latter; it had become dislodged. The dealer told me that often you will get the faulty crankshaft position sensor fault when in fact it's something else and the this code will come up if the engine won't run. My MIL lit up though until the fault was cured.
The thing that suggests it might be something simple is that it started and ran twice before failing to start. Assuming it didn't run long on these previous occasions I wonder if either the battery isn't up to snuff or if the engine is flooded. I find that only running an EFI engine briefly can cause starting issues later on because the ECU senses that the motor is currently cold and chucks more fuel into it, ignoring that there is already unburnt fuel in the engine from the previous brief run. It's happened to me and my daughter when starting our car engines just to shift the car on the drive. Remedy is to try starting with a wide open throttle, shutting it as the engine catches. FWIW I got fed up with assorted running issues on my C5 and bung d a carb on it. Never had any issues since, but most owners don't have too much trouble with their EFI, crude though it is.

[ShaunaManx]

Thank you all so much...

Sadly still no resolve. We just tried a brand new batter (I was really hopefully that might be the case), also tried the Easy Start spray, no luck.
correct starting procedure... all a go, double check the side stand disconnect and even took it off all stands again, swung the kick around.. again no luck. Went over all the wiring again again again...

Going to bust out the meter and see if we have any power loss in any of the lines...

I like rattle battles idea of putting a carb back on! But would still love a ride first!

[Hank HalfH]

Hang in there. These are fun but can be querky bikes. Have you asked last owner bout any tricks he use to start the bike.
Are you do any thing different than time it starts? maybe it stares at you but we think it must be some technical glitch that we miss most obvious. I hope so and good luck it will go soon