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Shock from the frame

Technical help for Series one, two and three Lambrettas. Models include the Li, Li Special, TV, SX, GP, Serveta and API/SIL models

Shock from the frame

Postby rodney » Sat Nov 14, 2020 1:16 pm

Hi, I have fitted a 12v kit and i have a problem. When kicking over I don’t get a spark but when I kick it over holding the frame I get a good belt from it. What have I done wrong ? Thanks
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Re: Shock from the frame

Postby Tractorman » Sat Nov 14, 2020 2:21 pm

Have you checked to see if you trapped a wire when fitting the stator?
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Re: Shock from the frame

Postby rodney » Sat Nov 14, 2020 2:59 pm

I have checked and no trapped wires
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Re: Shock from the frame

Postby ULC Soulagent » Sat Nov 14, 2020 4:12 pm

All the Earth points in place ?
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Re: Shock from the frame

Postby MickYork » Sat Nov 14, 2020 4:50 pm

The spark is sometimes very hard to see....(once in a garage, doors closed, lights out, pitch black...no spark... but fired up first time !!).

Basically there may be a spark, you're just not seeing it.
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Re: Shock from the frame

Postby rodney » Sat Nov 14, 2020 5:19 pm

There is no spark coming though at all even when holding my finger on it. As soon as I kick it over holding the end of the spark plug and holding the frame I get a really good whack of power.
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Re: Shock from the frame

Postby dickie » Sat Nov 14, 2020 6:05 pm

Sounds like you are providing the earth path back to the frame via your body.

Just get a piece of wire and make a solid connection between the engine and the frame. Doesn't matter how pretty it is but it must be electrically sound, just to prove the point. Clean any paint or rust off your chosen connection points.
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Re: Shock from the frame

Postby rodney » Sat Nov 14, 2020 6:14 pm

Ok thanks I’ll give that a try tomorrow.
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Re: Shock from the frame

Postby bsso78 » Sat Nov 14, 2020 6:15 pm

It sounds like the HT lead is trapped somewhere and the insulation has gone through.
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Re: Shock from the frame

Postby dickie » Sun Nov 15, 2020 5:05 am

bsso78 wrote:It sounds like the HT lead is trapped somewhere and the insulation has gone through.

Or that
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Re: Shock from the frame

Postby dscscotty » Sun Nov 15, 2020 8:21 am

+1, check HT lead,
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Re: Shock from the frame

Postby rodney » Sun Nov 15, 2020 9:01 pm

All sorted, earth not connected correctly. Thanks all
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Re: Shock from the frame

Postby Scooterlam » Sat Dec 19, 2020 1:03 am

rodney wrote:All sorted, earth not connected correctly. Thanks all

Out of interest, is the bike cabled up.
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