Bike refuses to start... I need help

[cloudbreakmd]

Ok new Dyna coils are mounted. We crank the bike and got it to cough but very intermittently. Still won't start. Checked the plugs (new) and there is a healthy fat blue spark. Tried starting fluid... nada. Priming the bowls... nada. Blowing through the vent hoses... small sputter (again very intermittently---> probably coincidental).

I am at a loss here guys. Battery is fully charged, starter turns the engine over strongly. Compression will forcibly blow your tight pressed thumb right off the spark plug hole.

Could it be timing? Any other things to check? It's been 12 hours of cranking on that bike again today. Any thoughts would be welcome at this point.

[Nessism]

What did you do since the last time it ran?

[TheCafeKid]

Are the plugs wet with gas? If they arent, chances are it isnt getting fuel, or enough fuel. What is the set up on this bike? IE, pipes, intake, etc? Any jetting mods? This is the 750T I am assuming, right? Where are your baseline carb settings at?

[robinm]

have

you got thr correct wires on the correct coils? and got the correct HT leads going to the correct plug?, ie coil 1 to no 1 and no 4 and coil 2 to no 2 and 3?

[almarconi]

Did you double check your wiring to make sure everything is connected
properly?

Was it running before you replaced the coils?

[chef1366]

I bet you switched the coils.

[psyguy]

you got thr correct wires on the correct coils? and got the correct HT leads going to the correct plug?, ie coil 1 to no 1 and no 4 and coil 2 to no 2 and 3?

i'll bet on this one

[Steve]

It's been 12 hours of cranking on that bike again today. Any thoughts would be welcome at this point.

My thoughts? You have one heck of a battery.

Actually, since the addition of a Dyna system is the only thing mentioned as a recent change, that is the first think I would suspect. I have never installed one, so I don't know all the little details, but I imagine it might be easy enough to accidently swap coil wires or plug wires, as others have mentioned.

Next thought: Did the bike start and run well before the Dyna install, or did you install the Dyna in hopes of getting it to start better?
If you installed the Dyna to get it to start better, consider adjusting your valves first. Hard cold starting is a classic symptom of tight valves.

.

[cloudbreakmd]

The history on the bike is that it sat for 4 years before I started working on it several months ago. Truth be told the bike has not run in four years. It ran fine until it was put away wet. A stage one jet kit was installed 2 months ago. The old coils were replaced because a friend of mine accidentally dropped the old set onto a concrete floor and I was being cautious about a future failure from damaged windings. Could somebody verify the wiring for the coil wires? I will take a pic of what I have.

[cloudbreakmd]

I have not heard the bike run in 4 years. Here is a list of work that's been done in the past four months:
Oil change
New Spark Plugs
New Air Filter
New Coils and Ignition Wires
Head Gasket
Valve Clearance Check
Carb rebuild/Jetting
Stator
Regulator

[Nessism]

My guess is timing - either cam timing or ignition.

If you put a test light on the signal wire firing the coil and then turn the engine over while watching the timing mark on the right side of the crank, the test light should illuminate when the F mark comes up on the indicator. Assuming this is okay, it wouldn't hurt to double check the cam timing. It's fairly easy to be off a tooth or so on the cam sprockets.

Last thing, maybe first, is to open a couple float bowl drain screws and see if the carbs are filled with gas.

Hope this helps.

[Goose]

If you're plugs aren't wet after all that cranking, you have a fuel problem.

Like Nessism suggests, open the carb drains and make sure you have gas there.

[cloudbreakmd]

The bowls definitely have fuel in them. I will check the rest.

[cloudbreakmd]

Left coil is feeding 1 and 4. Right coil is feeding 2 and 3.

All of the following images were taken from the right side of the bike (foot brake side).

I think the wiring is correct at this point. But I could be wrong... Sighs. Help?

[cloudbreakmd]

Oh and to be clear...

The left side coil has the rearmost plug wire feeding number 1 cylinder. The front plug wire on the left side is feeding number 4.

The right side coil rearmost wire is feeding number 2 cylinder and the front wire is feeding number 3 cylinder.