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:(:X:(WELL IVE HAD MY ORIGINAL COILS, GARAGE CHECKED THEY CAME BACK WITH A WORKING BUT WEAK DIAGNOSIS. SO AS THEY WERE THE CORRECT COILS INCLUDING THE RESISTER I REFITTED THEM TO THE BIKE IN THE VAIN HOPE OF SOME SPARKAGE BUT ALAS NO. SOI SET ABOUT CHECKING WIRING AND VALUES AGAIN. THE INDUCTION COILS SEEM TO READ OK NO SHORTS OR OPEN CIRCUITS AS ONE READS 510 OHMS AND THE OTHER READS 530 OHMS AGAINST A BOOK SETTING OF 530 OHMS +OR- 30 OHMS.

FINE NEXT TO THE IGNITER BOXES THIS IS WHERE IM EITHER CONFUSED OR STUPID ONE CHECK IS TO SEE WETHER THER IS A VOLTAGE AT THE CORRECT WIRES IT SAYS IN THE HAYNES MANUAL THAT IT SHOULD FLUCTUATE BETWEEN 12V AND 0V NOW I CANT WORK OUT IF THIS MEANS A REAL TIME FLUCTUATION ie THE NEEDLE BOUNCING UP AND DOWN . OR SOMEWHERE BETWEEN 12V AND 0V. IN WHICH CASE BOTH BOXES ARE A STEADY FIGURE OF 9V WITH A STEADY INPUT VOLTAGE OF 12V.



ALL IN ALL IT LEADS TO NO SPARKS IM FITTING NEW COILS WHEN I GET THEM POSSIBLY ON WEDNESDAY.

DOES ANYONE KNOW HOW TO INDUCE A SPARK FROM COILS TO CHECK THEM OR ANY FURTHER CHECKS THAT CAN BE DONE ON THE IGNITER BOXES.

SORRY TO BE A PAIN BUT ITS GETTIN TUNNEL VISION AND IM NOT REALLY THINKING STRAIGHT. FRESH THOUGHTS GREATLY APPRECIATED
 

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not sure about coils but if the ignitors on the back side are not melted they are most likely ok. they usually melt when bad.

most likely, bad coils but not sure.

i cannot see them both going bad at same time tho.



mark:waving:
 

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No spark on any plug??? I would not expect that if a coil or spark unit.. typically one coil or one spark box woul d have an issue and you would lose spark on 1/2 or 3/4 pair but not on both pairs... No spark at all suggest to me that there is a "common" source.. maybe power to the coils, a grounding issue,a connector, corroded terminals, run switch issue, fuse, etc.??.. something like that..

Incidently, the best way (IMO) of checking for spark is to pull all four plugs, reconnect the sparkpkug wires... ground the body of all plugs (preferably with a clip/wire) to the frame.. then crank.. The pairs (1/2 and 3/4) function independently and must both be grounded to work properly.. (grounding one side only is not good for the coil)
 

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sandiegobrass wrote:
No spark on any plug??? I would not expect that if a coil or spark unit.. typically one coil or one spark box woul d have an issue and you would lose spark on 1/2 or 3/4 pair but not on both pairs... No spark at all suggest to me that there is a "common" source.. maybe power to the coils, a grounding issue,a connector, corroded terminals, run switch issue, fuse, etc.??.. something like that..
that makes more sense. dog bone fuse? no, wouldn't be that if he's getting power at key



mark:waving:
 

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:cheeky1::action:well would you believe it the chap that gave me a hand had inadvertantly the plug leads back to front so was firing as the wrong time coupled with a weak spark this was not good so when i discovered this i put everything back together the right way round and hay ho away we go. this will hopefully be better with the new coils. but its 100% better than previously. thanks for all input. and sorry for being an idiot.

RIDE SAFE EVERYONE
 
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