Pb of connection with boyer cdi +new beam on a MK2A 850

L.A.B. said:

Welcome Jean-Yves,


Sorry, but I think some meaning has been lost in translation?

I do not really understand your reference to "I change the electric beam" (reverse the polarity maybe?) or "pb" (contact breakers maybe)?



You said "I have pb to connect the coil and especially with the four connection between the 2 coils (not on the coil) i think that one of this 2 pieces is a lucas rectifier"

I can only think you mean the 2CP condenser pack (rubber block?) and the ballast resistor (white ceramic block?) which are normally placed between the coils?
If you are removing a Boyer ignition, and refitting contact breakers (points) then you will need to reconnect those two items.

This is the Lucas rectifier which would normally be placed behind the left cover panel on the frame plate close to the battery, not between the coils: http://www.britbikespares.co.uk/USERIMAGES/610135.jpg


I apologise if I have misunderstood you.

I suggest that you type in your own language, as we have French speaking members here who may be able to help with a better translation?

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manx38 said:

So if i understand ,these 4 or 5 contacts (on ballast and condenser) are no connected with a bike with boyer cdi...

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manx38 said:

:roll: Hi guys, please to meet you !!
i have a 850 mkII and i rebuilt it since longs years... but i think that a nice sound will soon coming !! My last difficulties are about electricity :i change the electric beam the bike had Boyer cdi but i have pb to connect the coil and especially with the four connection between the 2 coils (not on the coil) i think that one of this 2 pieces is a lucas rectifier ...do i need to connect these 2 system with the beam and the coil with a boyer on the bike ? if yes can you send me the diagram of cable and color ?
Excuse me for my english ...i' m french and nobody is perfect !!!! :wink:
Thanks to you and best regards
Jean-Yves
manx38@aol.com

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L.A.B. said:

manx38 said:

So if i understand ,these 4 or 5 contacts (on ballast and condenser) are no connected with a bike with boyer cdi...

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Yes that is correct, the condensor pack and ballast resistor are not connected if a Boyer ignition is fitted.


Maybe you do not have a copy of the Boyer fitting instructions?

Boyer Micro MkIII system (Black box) http://www.boyerbransden.com/pdf/KIT000 ... 00017_.pdf

Boyer Micro Digital system (Red box) http://www.boyerbransden.com/pdf/KIT000 ... 00032_.pdf

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