Stag Ignition Lack of Luminition unit help again please?

[bonnietiler750]

Right then this is where I am 7 days before its supposed to be going to the Manx GP..ahem... I have all kinds of stripping down done...it appears that thee ignition switch is fine as everything works including starter motor...mind you the wipers have stopped working I'm guessing that is coincidental?
I looked at the fuse box..ugly in there but everything appears to work,,I have checked the Red feed to the ignition unit and it shows 12+v, so the unit is getting power, I have removed unit and re-earthed it, just in case, still no spark, I have a new coil and it shows just under 3ohm, with the ignition on and everything wired up the coil shows 6.8v this isnt much is that right?

[DJT]

TB17-Optronic-Ignition-Check-V1.pdf

Could this document be put in the Technical Section?

[Wheelz]

A 3 ohm coil is 12V, so fed from only 6.8V is not right is it. Either change the coil for a ballast coil (6V) or bypass your ballast.

Then if you still have no spark, you should test the Lumenition units (as per above).

[bonnietiler750]

Its a bit perplexing to be sure, with the pink and white ballast wire attached I get 7 volts, i remove it the reading drops to under 1 volt, any way i can power the coil up to 12v just to see if the thing will start?

[mallardstag]

Its a bit perplexing to be sure, with the pink and white ballast wire attached I get 7 volts, i remove it the reading drops to under 1 volt, any way i can power the coil up to 12v just to see if the thing will start?

Connect a wire from battery+ve to coil +ve.
Don't leave it on for too long or you may cook the coil.

[jbuckl]

Its a bit perplexing to be sure, with the pink and white ballast wire attached I get 7 volts, i remove it the reading drops to under 1 volt, any way i can power the coil up to 12v just to see if the thing will start?

If you have 7 volts ….use a 1.5ish ohm coil.

Whereabouts are you?

Are there any local owners able to visit / help?

[Wheelz]

Its a bit perplexing to be sure, with the pink and white ballast wire attached I get 7 volts, i remove it the reading drops to under 1 volt, any way i can power the coil up to 12v just to see if the thing will start?

Yes, just rig a temporary 12v lead onto the coil+.

[bonnietiler750]

Tried that still nothing its like there is an immobiliser on, if it was a bike id swear id left the sidestand down!
Power from new Luminition
Showing power at the optical unit, for some reason showing only 7v at the coil and this just drops to nothing with the Ballast wire removed.
so been on it all day and achieved precisely nothing
Getting me down this one is and no mistake

[flying farmer]

You won't get anything at the coil with the ballast wire removed, its there to feed the coil!
You should see about 7V engine off and about 8V engine running. While cranking you should see a bit more than 8V if your battery is any good, that feeds from the yellow and white wire from the starter motor and it only feeds while cranking. If the cranking Voltage at the coil is only about 5V then either the wire has broken off the starter or there is a problem with the solenoid.

One symptom I have noticed with a broken ballast bypass wire is that the engine will sometimes fire once after you have released the ignition key, just before the engine stops turning. Its caused by the voltage to the coil suddenly increasing as the drain to the starter motor is removed.

Neil