Starter fluid does not get it to start, either in fuel line or through airbox.
Bike can be push started, and once it's running it runs GREAT. Never had so much power and responsiveness.
The question RE if it restarts hot is a good one, though it sounds like it never starts except by pushing.
I am fighting a tenacious intermittent/no start issue and am wary of giving advice right now--I thought I had this licked (and I still think I do!) but I also think I may have just fried a CDI in testing
That or my multimeter pooped the bed at the same time something else went wrong. Seems unlikely.
Anyway, the two differences I see between bump starting and using the button are
1. As mentioned, the engine could be spinning faster and making more voltage at the exciter coil = stronger spark
2. The Y/B wire from the starter relay won't be energized if you're bump starting--this wire is the rogue connection to the CDI added on later bikes, and it's only hot when cranking edit: Jury seems out on exactly what this wire DOES.
3. Your thumb isn't physically pushing down on the starter button.
1. If you haven't already, pop the tank and measure AC voltage from the exciter coil while cranking--same place you measure resistance of it when it's just sitting there per Clymer. Disconnect both connections from the stator cover, which can be found up near the CDI / coolant overflow, so there's no wackiness getting to the CDI. I haven't found a concrete number on correct, but internet sources suggest 55-60v AC when cranking. If you're seeing substantially less than that, your CDI will have issue getting enough ooomph to spark in the combustion chamber even if you see a spark in the garage when the plug is pulled.
2. Try pulling the y/b wire from the CDI and push the start button. I would be amazed if it mattered, but it is one of the few places the bike could know that you were starting it with its own power instead of a push.
3. Make very sure the bike is in neutral and jump the battery hot to the lug on the starter downstream of the relay, or simply jump the relay itself. Can't hurt.
Curious to know what you find. I am waiting on a CDI and I'm going to hopefully have my bike together, then I'll update my own thread. The perfect is the enemy of the good and I should have stopped when the damn thing ran instead of trying to improve stuff!