airhead died.....

[Bubb]

Well, my little ST was running fine yesterday, and again this morning on the way to work..... no stuttering, no pinking, etc...
But when I came out from work to come home....No spark on either plug ( plugs are new-ish... about 2 months old, and not huge mileage).... I checked wiring, and no breaks in anything I could see.

I suspect the coil has died, but never having had a coil die on me, Im wondering if they just die with no pre warning.
Have taken the coil off and my friendly mechanic mate (ex BMW mechanic) is going to test it for me tomorrow.

If its not the coil, what is the next thing to try?

Thanks

Bubb

 

[DrFarkoff]

Cough Cough Kill Switch?

 

[Voyager]

I have seen a couple of failed coils (one of mine & one from a neighbour), both had split resin cases and on mine one of the contacts was falling off.

If this is normal when they fail I would have thought the condition would have given it away (or do they also fail internally without evidence?).

I hope it turns out to be an easy fix.

Bob.

 

[Rob Farmer]

Rest a plug on the cylinder head and toggle the kill switch with the ignition on. It should induce a spark. If it does spark then it could be a hall sensor failure. This isn't a 100% accurate method but it does prove several components if it does.

 

[solidstate100]

Rest a plug on the cylinder head and toggle the kill switch with the ignition on. It should induce a spark. If it does spark then it could be a hall sensor failure. This isn't a 100% accurate method but it does prove several components if it does.

AS Rob says. If you do get a spark, then (with the kill switch on) crank the enginge on the starter. If no spark then it almost certainly the Hall sensor.

 

[Bubb]

Rob & Solidstate

Thank you both for your replies...

I tried the toggle the kill switch and got a spark, so assume the coil is okay, and its the bean can/hall sensor, as no joy on trying the start button after toggling the kill switch.

Have ordered a new hall sensor from Motorworks, and hope to have some joy.

Will update when I know what was wrong


Many thanks to those who helped..... this place is great


Bubb

 

[DrFarkoff]

Bubb I have seen quite a few failed ignition amplifiers this last while too

Worth a quick swap if you have one

But make sure and get some heat transfer paste on before you go on a big trip

 

[Bubb]

Tanks

Rob farmer, Solidstate, DrFarkoff

Thanks to you all, I have a live airhead...... it was the Hall Sensor/beancan.

Shes up and running, just need to check the timing is spot on tomorrow.


Again, THANK YOU.


Bubb

 

[solidstate100]

Excellent, great news!

 

[Rob Farmer]

Result!