Ignition Coils

[RPM - Robert]

You don't even need the alternator at all for the bike to run, as long as the battery is fully charged it will run for some time.

No spark is not this.

[AppleJack]

Wha?!  Do you agree that this alternator is bad though?  All is does is charge battery then?

So it's not:
Alternator
Pickup Coils
Ignition Coils
Kill, Neutral, or Sidestand switches
Spark Plugs/Wires
2 TCI boxes
All Fuses
New Battery

I'm running out of things to check here - somebody please throw me a bone

[RPM - Robert]

I don't know that I have seen a "bad" alternator on the FJ, overcharging problems yes but a complete failure, not that I have seen. I am sure there have been a few but so far and few in between I would say yours is likely fine.

Alternator can't check this with out bike running:
Does it charge at the proper voltages? Yes, it's good.
                                                       No, it's bad.

Does it overcharge? Yes, regulator is bad.
                            No, it's good.  



Do you have the coils grounded to the frame? All grounds clean and not covered in paint, rust, or corrosion. You are missing something somewhere but I really do not know what.

[Pat Conlon]

So it's not:
Alternator
Pickup Coils
Ignition Coils
Kill, Neutral, or Sidestand switches
Spark Plugs/Wires
2 TCI boxes
All Fuses
New Battery

I'm running out of things to check here - somebody please throw me a bone

Ignition switch? Are you sure your wiring harness is properly powering the above components?
Is the rotor and ignition pick up coils set properly...?
So many possibilities....I agree with Robert, you can start and run your FJ engine without alternator output or even the alternator for that matter.
Drag racers do it all the time. It's called a total loss electrical system.

You don't even need the alternator at all for the bike to run, as long as the battery is fully charged it will run for some time.

If by chance, you want to know what "some time" means, I can tell you precisely how far the FJ can travel in the day (headlight fused pulled) at 75mph, from a fully charged battery to engine shut off...(86 miles)
....and, as a bonus.....
I can also tell you precisely where, on Interstate 80 between Rawlins and Rock Springs, Wyoming in the middle of BFE, the point when cell phone coverage ends.

[Sparky84]

The most accurate method for determining if there is spark is to have a friend hold the plug while you crank.Another method is to use a timing light.

Seeing all else have failed have you tried "the timing light" instead of just looking for a spark!

Also you can mark off the mirrors as being at fault   

[T Legg]

The most difficult thing to figure out how to fix is something that isn't broken.

[AppleJack]

Ha - Funny story Pat  

And some more good ideas, I'll do some more troubleshooting this weekend  TY

BTW, the mirrors ARE junk but not 12V!

[1950Randy]

Did the problem get resolved?
I am having the same problem, checked everything out but no spark. Two ignition boxes, checked all swithches, wires and resistsnce of pick up and ign coils.
Getting desparate.

[Pat Conlon]

Hi Randy, FYI here is the minimum wiring needed to run the FJ engine. (You can delete the vacuum advance and gear selector gauge)
This came courtesy of Randy at RPM. This is how he wires his race cars (Legends and Thunder Roadsters)  




For test purposes why don't you put together a temporary harness to check things out?

[1950Randy]

Got mine up and running. The timing light verified i had spark, from there it was straightforward.
Thx

[T Legg]

The most difficult thing to figure out how to fix is something that isn't broken.

.     

                  Glad you got it running.