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D7 strobe light timing
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bashtam
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September 20, 2021 - 9:54 pm
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Hello all, I have a 1960 d7  fitted with 12v conversion and electronic ignition. After fitting this system and running the bike successfully I wanted to check the timing using a strobe light. Having purchased a strobe light I started the engine and fitted the light. The problem is that the light does not flash,I fitted the strobe to my car and it works ok. It fitted the light to the bike and tried again but not working. Any help please, thanks.

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mike p5xbx
E-Sussex
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September 20, 2021 - 11:43 pm
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Have you tried connecting the timing lights power leads to the car battery
and the trigger lead to the bantams HT lead

D? - D10- D14 Bantams 350 AJS -500 Triumph http://bsanotru.....lfire.com/

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bashtam
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September 21, 2021 - 6:07 pm
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Yes I have connected the power leads to my car battery and the engine running but no light.

Thanks

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Sponge
Lancashire (A chip shop somewhere near Preston)
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September 21, 2021 - 6:46 pm
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Shielded HT lead ?

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mike p5xbx
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September 22, 2021 - 12:34 am
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the only thing I can think of trying is
If you have a small length of copper cored HT lead put that between the HT cap and the sparkplug and clip the pickup to that
Is it an Electrex World ignition?

D? - D10- D14 Bantams 350 AJS -500 Triumph http://bsanotru.....lfire.com/

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bashtam
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October 7, 2021 - 9:12 pm
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The whole ht lead has a copper core, its a Mike Kilvert ignition system and 12v charging. 
Thanks.

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Lone Wolf
The Black Country
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October 8, 2021 - 9:02 pm
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Wotcha.

With some of these electronic ignitions, the spark is of such short ( but powerful ) duration that strobes ( and some rev counters ) will not "see" the spark.

I've had this problem on a friend's bike which has an Electrex World system fitted.  The bike runs great, but the Smiths electronic rev counter is all over the place.  The only way ( well, the easiest way ) we overcame it was running a Hall Effect trigger off a small magnet, then using that to power a miniature relay ( five for 99 pence - China - eBay ) which in turn powers the rev counter. . . . . . so far it ain't worn the first relay out.

^..^

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paulkentuk
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October 10, 2021 - 10:47 am
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With timing set-up statically, ( following the manufacturers instructions) and the engine running without issue, you've cracked it !

I'd bank that as a win ! 

 

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