In CDI ignition motorcycle I want to add 2more spark plugs, so how to connect 2more ignition coils what will be the circuit details whether it will be connected in series or parallel. what precautions needs to be taken

 

Are the present coils dual output?
If not you should be able to change to a dual output type without a problem.
Otherwise it would be difficult to do.

 

Are the present coils dual output?
If not you should be able to change to a dual output type without a problem.
Otherwise it would be difficult to do.

No the present is with single spark plug single coil, I have taken trial with adding a Coil in series connection its firing but I dont know whether it will ruin any thing as don't know drawbacks or how it will affect other parts of bike that is what i want to know & its not firing whet its connected in parallel

 

You are asking the ignition system to output 2 X more energy.
It might not be up to the task, without modification.

 

You are asking the ignition system to output 2 X more energy.
It might not be up to the task, without modification.

No, I have tried connecting separate ignition for individual spark plug the thing is that it's working when connected in series but want to know the does it affect any parts like battery, cdi, or any other parts will it's last long, as I am going to use same specification ignition coil? Will out put of every spark plug will be same or it will be different for every spark plug like spark intensity or the spark plug will foul after some time of use as I heard in series connection out put voltage becomes 2x

 

it's working when connected in series

The ground connection of most ignition coils is common to both the primary and secondary windings, so can you post a drawing of exactly how you have them wired for this series connection?

 

The ground connection of most ignition coils is common to both the primary and secondary windings, so can you post a drawing of exactly how you have them wired for this series connection?

 

Nice drawing. What software did you use?
With the primaries series connected like that, each primary has only half the normal voltage across it and only half the normal current through it, so the spark plug voltage is also halved. There should be no adverse effect on the CDI unit.

 

In CDI ignition motorcycle I want to add 2more spark plugs, so how to connect 2more ignition coils what will be the circuit details whether it will be connected in series or parallel. what precautions needs to be taken

Most Japanese multi cylinder and some twins use a "wasted spark" coil - it has 2 HT leads.

 

Putting coils either in series or parallel is not recommended.
Use a dual output coil as I suggested.

And your drawing shows a standard Kettering ignition, not a CDI.

 

Putting coils either in series or parallel is not recommended.
Use a dual output coil as I suggested.

And your drawing shows a standard Kettering ignition, not a CDI.

Why is it not recommend to use it in series or parallel can you please elaborate in detail

 

Most Japanese multi cylinder and some twins use a "wasted spark" coil - it has 2 HT leads.

For that I need to find 2ht lead coil which will suit my bike, seems to be difficult

 

Nice drawing. What software did you use?
With the primaries series connected like that, each primary has only half the normal voltage across it and only half the normal current through it, so the spark plug voltage is also halved. There should be no adverse effect on the CDI unit.

If there is no any effect to other parts of bike i will go further for tripple spark ignition to my bike, thanks

 

Why is it not recommend to use it in series or parallel can you please elaborate in detail

The plug that fires first will tend to take most of the energy.

 

For that I need to find 2ht lead coil which will suit my bike, seems to be difficult

How is that more difficult than using two separate coils?

 

I tried

How is that more difficult than using two separate coils?

I have tried One but not working as it's electronically controlled (ecu) it's difficult to find such coil with cdi

 

The plug that fires first will tend to take most of the energy.

But I want both plugs to be fired at same time

 

i will go further for tripple spark ignition to my bike, thanks

Using coils in series or parallel won't work reliably, for reasons given by Crutschow.
With coil primaries in series you'll get weak (reduced voltage) sparks. With coil primaries in parallel you'll draw excessive current from the CDI unit and probably destroy it.

 

Using coils in series or parallel won't work reliably, for reasons given by Crutschow.
With coil primaries in series you'll get weak (reduced voltage) sparks. With coil primaries in parallel you'll draw excessive current from the CDI unit and probably destroy it.

How much voltage will drop i mean in percentage compared to first coil like 100:50:25% like that or different?

 

For that I need to find 2ht lead coil which will suit my bike, seems to be difficult

Look on spares lists for 80s Japanese motorcycles.

David Silver probably has some Honda stock.