Boyer Ignition - Again

[paulbaker1954]

Well it’s all installed and running and I am REALLY pleased

Just been for a 2 hour thrash round Cheshire to test

Bike definitely starts easer ( but that was probably more down to 45 year old coils!!) and definitely smoother tickover

Also just seems to run smoother right through the rev range

Definitely a worthwhile upgrade with the bonus of less maintenance

😀😀😀😀😀😀

Only negative is it’s a bit DIY to fit, I used some Al bar fitted each side on the original coil mounts to fix the micro coils (thanks Roy Hall for pictures) which worked nicely and gave a neat installation. The blue box then fitted nicely on top of the bars

[Rob62]

Glad to hear you’re happy with the installation... Ive been thinking that the Boyer ignition is a worthwhile mod and may go for it myself.. You opted for the version which uses new coils i see. There is another option using the original coils but as you mention they are old and may not be the best way froward.

[paulbaker1954]

Hi Rob,
I just reckoned that changing 45 year old coils was never going to be a bad idea and looks like I was proved right, much fatter spark and starting performance.

Great investment go for it.

[Rob62]

Cheers Paul i think i will.... did you buy yours on-line? If so from where? I’ve looked on the boyer website for dealers and they give me a choice of one and when i look on their website there is no mention of boyer.... i suppose i could always ring them but i always like to browse on line if possible.

[watty51]

I sent Boyer a email about ordering a kit off them and this is the email i had back today. Hope this helps.

Morning,
 
You can purchase these direct from ourselves.
 
You can either call us on the number below selecting option 1 for sales and pay with your card details.   Alternatively, I can send you a PayPal invoice, but just to advise you that there is a small fee of £2.50 for this.
 
The cost of this kit that comes with high powered mini coils is £218.46 which includes VAT and postage to UK.
 
I look forward to hearing from you.
 
Kind regards
 

Karen
Sales

[Rob62]

Thanks Watty!

Thats perfect....

[deltarider]

What does 'high powered mini coils' mean?

[paulbaker1954]

Yes I ordered direct from Boyer, delivered next day. Great service

[mike the bike]

I was wondering what micro coils were too.

[paulbaker1954]

What does 'high powered mini coils' mean?

Great question the Boyer site mutters something about them being controlled by current rather than voltage, also the 2 coils are wired in series as opposed to parallel.

I'm a mechanical engineer so all this volts and electrons stuff sometimes gets me a bit lost. All I know is the end result is a better spark, better starting than my aged Honda coils as I said before.

Be interested to know more about the science if anyone knows (sounds like one for Ash to weigh in on !!)

[Rob62]

What does 'high powered mini coils' mean?

Lol... I’m not an electronics expert but i bet what boyer mean is the coils are smaller than the originals (hence the mini) and have at least as much output (hence the high powered).... just a guess though as i havent seen them....

[kevski]

Voltage is speed of current, current is amps, simplistic look at it,  boyer does give a brief explanation of the coils and why they are needed with certain systems relatively easy to understand if you don't try to over think it.

[K2-K6]

The bit Hondaman wrote about this is interesting.

By reducing the resistance of the coils,  they have a higher "output" but usually a shorter duration spark time. Nothing comes free in physics, you have to decide what you want to trade off one against another.

Honda,  along with their ignition component suppliers,  designed spark time of about 1.5 milliseconds because of the combustion chamber design and burn characteristics,  understanding if you want to deviate from that is relevant to what systems you use.

The Boyer may fulfil that,  but does anyone have that spec to compare?

"Higher output" is of course an easy sell,  may not gain much in reality.

[deltarider]

The bit Hondaman wrote about this is interesting.
By reducing the resistance of the coils,  they have a higher "output" but usually a shorter duration spark time.

I don't see why this would be the case, nor have I seen any proof of this and what to think of the word "usually". I apologize for overthinking this.

[K2-K6]

It's this bit here that I'm looking at.....

http://forums.sohc4.net/index.php/topic,113338.25.html

See what you think.