Non starting Zeph11

  • moizeau
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Re: Non starting Zeph11

11 Feb 2026 11:30
#921400
Stuck some nice new fuel in after draining everything in sight...........as expected, nowt, not even a cough.. Took a plug from each cylinder out, closed the door and turned the light off. Yep, a spark, but reddish? The plugs where damp after trying to start it, as is, left a trace on your finger..
Didn't have any 'start yer bastard' though the phrase was used. I squirted aerosol brake cleaner at the gauze just before the airbox to carb rubbers (air filter removed).. Not a cough, took the outside plugs out, they were damp. Cranked it over with my hand over the exhaust (in case a family of rats had made a new home to get out of the rain) could feel it pulsing. Even stuck my compression tester on No.1, cold engine, wide open throttle, 150psi. I did this because the last time it ran was after I'd had the cams out to do the shims and therefore, the camchain tensioner, in case it had jumped a tooth, no real need but for 2 mins time it cost nothing.
Back to electrickery.
Took the IC Igniter off and probed the pins. I had done this before and saw some strange results but hadn't written them down.
The FSM does state that unless you use the 'Kwak' tester results may vary. I used my tester and a friends tester and the results were the same.
FSM chart 

My measurements

On the 1st block of 8 pins numbers 1,2,5 and 6 gave open circuit, no reading at all.
On the second 11 to 15 gave no reading, but 15 to 11 did.
As you can see a lot of the other readings are way off. I may have misread the odd one and put the decimal point in the wrong place but this suggests to me that it's buggered. Which is a bugger because I've found 1 for sale in France for 250 € and ity's 4 1/2 hours away so can't even put the bike in my van and take it there easily.
If someone could post what any readings should be if I plugged it back in and backprobed that would be a great help.
I haven't tested the boost sensor but I can't see that stopping it starting, from what I've read it affects ig timing a bit.
Sorry for the long post but I want to give as much info as poss to allow people to pick up on any errors I have made etc.
Cheers

 

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  • Wookie58
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Re: Non starting Zeph11

11 Feb 2026 12:27
#921402
I will have a look over the next couple of days and get back to you
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Re: Non starting Zeph11

11 Feb 2026 12:58
#921403
Cheers, appreciated

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Re: Non starting Zeph11

Yesterday 06:04
#921421
As a starter take a look at the below, I have transposed your results into the factory spec. Will put you a test plan together for the wiring

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Re: Non starting Zeph11

Yesterday 06:19
#921423
Thank you very much indeed. As it happens I've just found an alledged good one for 70€ + P&P but would like to continue testing mine if that's OK with you?
Thanks again for you time and knowledge so far.
Pete

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Re: Non starting Zeph11

Yesterday 14:22
#921445
I shall, cheers

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