Boxerworks.com

No,

The timing map was supplied to me by Boyer, this was some time ago, so it may have changed since then.

You can see the tickover stabilization at low revs and the way that timing is retarded between 2500 and 300 revs to reduce pinging.

I have had a Boyer on my /6 for close to8-9 years now. Knock on wood...never had a problem.

I fitted a Micro digital to my /7 almost 15 years ago and havent touched it since. Set it to full advance at 3500 revs, never been on a dyno.

I fitted Boyers latest Micropower system to my twin plug 1000 cc G/S 3 years ago and it has been trouble free too, and the curve seems to be just about perfect.

The G/S doesnt have a rev counter, and my timing light wasnt working so it was set initially by adjusting the timing to give the fastest running at a fast tickover, retarding it till the revs just slow down, then a few test runs up my favourite test hill advancing it until it performed the best.

Had it checked later on a dyno and it was spot on for power where I wanted it,(3000 t0 6000 revs), with around 26/27 degrees advanced at 3200 revs , although it kept advancing after that. I have no idea how it pulls between 2000/3000 revs in any gear other than 1st and am unlikely to ever find out.

Those who use a dyno properly seem to find that the optimum advance for a single plug airhead varies between 30 and 36 degrees, at 3500 revs, so my timing setting may not work for anyone else.

FWIW most electronic systems are programmed to adjust any flutter and equalize spark intervals, so the theoretical advantages if crank mount systems are just that.

When some of the expensive crank mount systems first became popular a few years ago some guys mounted them so that they were switchable on the run with the OEM system - none reported any detectable difference in performance between the systems.

But our bikes are getting long in the tooth - if you decide that your old ignition bits are worn out a Boyer Micropower will replace everything from the bobweights to the plug cap for less than $200-, will work a lot better than your worn out bits, and in my experience will never need touching again.http://www.gremlinracetech.com/product/BBMP

I put the micro-digital in my 1979 R65 a few weeks ago, but found insurmountable problems (in addition to the rudimentary instructions, and the necessary hacking to get the thing to fit). The tach ceased to work properly. In neutral, the rev's somehow rose past 1,500 rpm to nearly 5,000 rpm without additional throttle. So with those two issues, I had trouble finding the advance mark on the flywheel (so I set the timing, using just the non-advance mark). And then, I had terrible knocking under acceleration.

And due to the hacking, when I went back to the mechanical system, I had to un-hack (ie, unbend) the spring holders.

I've sent e-mails, but as of today, replies have seemed to dwindle to nothing.

Boyer fitted into bean can? I have never fitted one to a bean can so cant comment on how it is done.

I don't think that revs rising to 5500 W/O throttle is a timing issue, but ironically if you had set it on the F mark at 5500, then it would have been in the ball park. Boyers must be set on the F mark. The rev counter is triggered by the coil, I would check the wiring.

The only way I could set it with the strobe was at the S mark at idle. That's all I could find, since both the tach and the engine rev's in neutral were a bit chaotic with the Boyer installed. I could briefly see the F mark flash by at some point, but getting it to stay so that I could adjust the rotation of the bean can was impossible.

The rev counter is fine...now that I've reinstalled the old mechanical system.

hi to all, quixotic jump on the phone and give me a call, the tech guy there where helpfull . i had some issues with a new micro digital system that i purchased recently ended up being faulty unit ! $35.00 later (ouch ) to return it back for warranty to the UK , wasnt sure if youse where aware of this but was informed that the OE coils have the wrong resistance to run with the boyer ignition system, they recommend atleast 3.5 min to 5 max ohm's (total ) the OE coils are around 2ohm ( total ). in the end i purchased some cute little 6 volt coils (made in germany) that bolts in the OE postion with new coil clamps . thought this info may help someone in the future !

Also microdigitals require 5000 Ohm resistor plug caps or there is a possibility that feedback will disturb the black box.

quixotic wrote:I put the micro-digital in my 1979 R65 a few weeks ago, but found insurmountable problems (in addition to the rudimentary instructions, and the necessary hacking to get the thing to fit). The tach ceased to work properly. In neutral, the rev's somehow rose past 1,500 rpm to nearly 5,000 rpm without additional throttle. So with those two issues, I had trouble finding the advance mark on the flywheel (so I set the timing, using just the non-advance mark). And then, I had terrible knocking under acceleration.

And due to the hacking, when I went back to the mechanical system, I had to un-hack (ie, unbend) the spring holders.

I've sent e-mails, but as of today, replies have seemed to dwindle to nothing.

I have a 79 R65 also and it is currently having timing issues. It has been apart for a couple weeks while I deal with neices that want to play on the lake. I am interested in the crank mounted ignition system and I would like to understand the problems you had with it more fully and what their resolution might be.

Thanks
Brad

chasbmw wrote:Also microdigitals require 5000 Ohm resistor plug caps or there is a possibility that feedback will disturb the black box.

thanks chasbmw, forget to mention that about the HT leads.