twin output coil (2014)

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There's no actual need for the Boyer box positive wire to go to the coil positive terminal at all, as long as the box and the coil both have a 'ground' connection, the double spade connector of the single coil simply provides a convenient junction for the positive wiring, so for a dual coil, connect both items (box & coil) directly to ground.
 
Nater_Potater said:
"Why do the British drink warm beer?"


A quick lesson in beer.

The poorer the quality of the beer, the colder in needs to be served. Poor quality brewing produces a beer with more volatile organic components which give that awful smell of beer in the carpet the morning after a party.

The colder the beer is served, the less these volatile evaporate and the less you can smell and taste these volatiles.

If you brew decent beer in the first place it can be served at a higher temperature and still taste good.
 
Chris T said:
I've now received my twin output coil from R G M and am installing it. My current twin coils have a positive ground connection to the head steady as well as the positive connection to the Boyer ignition unit , but the twin output only has spade connectors for one positive connector and one negative which I assume are for the positive and negative connections to the Boyer. The only way that I could get a direct earth connection from the twin output would be to splice the earth to the ignition spade positive connector and connect the positive to the head steady ground point as well as the Boyer box. Am I correct in my assumption that this is not necessary - ie that I just connect the coil to the Boyer box and omit the positive ground?

No, 'the twin output only has spade connectors for one positive connector and one negative which I assume are for the positive and negative connections to the' Battery.

The Boyer amplifier simply acts as a switch to switch this battery voltage on and off, just the same principle as points openeing and closing.

Your battery is wired positive ground, that it it is connected to the frame/engine. The red wire coming out of the Boyer amplifier has to be connected to the battery positive, this is done by connecting it to frame ground. The positive coil terminal also has to be connected to the battery positive, again by connecting it to ground.

The battery negative is switched by your ignition switch, and the ignition switch output has to be connected to the white wire coming out of the Boyer amplifier. This provides the Boyer negative voltage.

The black wire coming out of the Boyer is battery negative voltage, as switched by the Boyer unit. When switched on (normal state once ignition is 'on') the coil charges, when switched of by the sensor signal, the charge in the coil collapeses and you get your spark.
 
andre said:
twin output coils of Jap bikes work well. Cheap at the bike wrecker

I bought one 12 volt double ended coil off a Honda for about $5 from a wrecker years ago, and I'm still using it with the Boyer. I wouldn't even contemplate fitting two 6 volt coils in series. From memory the coil connection with the Boyer is specified on the sticker on the box. It was a no-brainer. I've lost the sticker off my Boyer, so the next time I'll probably be on this forum asking the same questions as yourself. I think the wiring diagram is on the web somewhere. One thing I have fitted to mine is one of those push button switches between the Boyer unit and the battery, so it I drop the bike and the throttle stays open, I can easily cut the power, - otherwise I can simply yank the leads and the connectors will separate.
 
I;ve used the dual output coils from Kawasaki GPZ 550. The advantage with them is you can replace the HT leads. They're not bonded in like many Honda coils are.
 
pommie john said:
Nater_Potater said:
"Why do the British drink warm beer?"


A quick lesson in beer.

The poorer the quality of the beer, the colder in needs to be served. Poor quality brewing produces a beer with more volatile organic components which give that awful smell of beer in the carpet the morning after a party.

The colder the beer is served, the less these volatile evaporate and the less you can smell and taste these volatiles.

If you brew decent beer in the first place it can be served at a higher temperature and still taste good.


This is huge! I always assumed it was savages spilling/vomiting/applying other bodily fluids on the carpet that caused that odor... airborne you say? :?: :idea: :mrgreen:

I love this place. I learn a lot. :P
 
concours said:
pommie john said:
Nater_Potater said:
"Why do the British drink warm beer?"


A quick lesson in beer.

The poorer the quality of the beer, the colder in needs to be served. Poor quality brewing produces a beer with more volatile organic components which give that awful smell of beer in the carpet the morning after a party.

The colder the beer is served, the less these volatile evaporate and the less you can smell and taste these volatiles.

If you brew decent beer in the first place it can be served at a higher temperature and still taste good.


This is huge! I always assumed it was savages spilling/vomiting/applying other bodily fluids on the carpet that caused that odor... airborne you say? :?: :idea: :mrgreen:

I love this place. I learn a lot. :P

One can only presume that you frequent a lower class of drinking establishment sir...
 
Thanks for the information guys; and I'm glad I asked; I would have done it wrong. One day I might get to grips with this electricity thing properly
 
I know this is an old thread but I have just ordered an RGM dual output coil which as it happens is a Boyer item. As the plug leads are bonded I was looking to see if they were resistor leads or copper core and there is no information on either the RGM or Boyer website. After drawing a blank I called Boyer this morning and the leads are non resistor copper core so you need to use either resistor caps or plugs. RGM have now added this info to their website.

Dave
 
Just had delivered from NZ a Pazon sure fire system with there IC35 dual output coil to match... the reason i went for this is because the leads can be easily replaced as removeable .... not yet fitted so cant vouch for anything else
 
With my Boyer, I simply use a 12 volt double-ended Honda coil to fire both cylinders simultaneously. It was probably off a CB750. With twin coils you have at least two more electrical connections which can become uncertain.
 
I know this is an old thread but I have just ordered an RGM dual output coil which as it happens is a Boyer item. As the plug leads are bonded I was looking to see if they were resistor leads or copper core and there is no information on either the RGM or Boyer website. After drawing a blank I called Boyer this morning and the leads are non resistor copper core so you need to use either resistor caps or plugs. RGM have now added this info to their website.

Dave

If plug caps are not fitted, you should be able to see the copper core of the HT leads.
 
If plug caps are not fitted, you should be able to see the copper core of the HT leads.
Update: The RGM/Boyer dual output coil has been delivered this morning, the plug leads are copper core but no longer bonded which is a bonus.

Dave
 
Update: The RGM/Boyer dual output coil has been delivered this morning, the plug leads are copper core but no longer bonded which is a bonus.

Dave
So the coil is fitted. I removed the original coil mount and made up a stainless steel adaptor plate that attaches to the rearmost mounting holes for the original coil mount and the coil then attaches through two holes in the adaptor plate which are along the centre line of the bike. The twin coil tidies up the coil area and the wiring. I never had an issue starting mine but it now starts with less effort by that I mean you don’t have to kick it so hard. All is good and I’m happy with both the aesthetic and practical results.

Dave
 
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