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S2 350 Electronic ignition
Posted: Mon Oct 18, 2021 1:25 pm
by BobHenry999
Hi,
I have just recently bought a lovely 1972 S2 350.
Currently it is running on points but I was wondering if it is worth fitting some form of electronic ignition for reliability purposes.
Has anyone done this, and if so what system is recommended ?
Thanks,
Bob
Re: S2 350 Electronic ignition
Posted: Mon Oct 18, 2021 1:30 pm
by Triple Parts
Re: S2 350 Electronic ignition
Posted: Mon Oct 18, 2021 2:05 pm
by Goalhanger
I’ll be interested to see how you get on with this as I’ve just bought a basket case S2A and the points are totally wrecked.
Phil
Re: S2 350 Electronic ignition
Posted: Tue Oct 19, 2021 3:31 am
by Rickm
Re: S2 350 Electronic ignition
Posted: Tue Oct 19, 2021 7:15 am
by malc87
Club member Bill Bristow has fitted a lot of these to triples inc S2 and H1B and said there a real good product
He also gets them from Simon at triple parts

Re: S2 350 Electronic ignition
Posted: Tue Oct 19, 2021 8:42 am
by Treeman
Just a word of caution - I have fitted a Boyer Bransdon Electronic Ignition on a KH250 in the past and reverted back to points in the end as, if the batterry is a little bit low, it started to misfire (even when doing simple things like turning the indicators on). It may have been caused by something else, however, the problem did not reoccur once back to points....
Re: S2 350 Electronic ignition
Posted: Tue Oct 19, 2021 9:03 am
by malc87
Common problem with a boyer ignition. they work great though with a good battery.
Re: S2 350 Electronic ignition
Posted: Tue Oct 19, 2021 9:36 am
by Rickm
I believe the Boyer issue is caused by the fact that it sparks 3 times for each revolution of the crank (i.e. all 3 plugs fire simultaneously 3 times per rev). This needs a good battery and charging system to achieve.
The Accent system only fires each plug once per rev, and so doesn't draw as much from the battery.
I fitted one to my S3 (see above link) and once set up it's been perfect ever since.
Re: S2 350 Electronic ignition
Posted: Tue Oct 19, 2021 10:40 am
by TallyB
Fitted a Boyer to my S2. Can't comment on battery life/misfires as I don't do a lot of miles, but it does work.

Re: S2 350 Electronic ignition
Posted: Wed Oct 20, 2021 7:28 pm
by BobHenry999
Chaps,
Thanks so much for all of the advice, I’ll get myself an Accent system as that sounds to the best solution. I’m more than capable of fitting it (I think ! ), but would the ignition timing need re-setting, if so is there anyone you can recommend that I can take it to in the Colchester area who could do that for me as I wouldn’t feel comfortable doing it.
Thanks again.
Bob
Re: S2 350 Electronic ignition
Posted: Thu Oct 21, 2021 6:49 am
by Rickm
If you can actually fit the Accent system (it's fairly straightforward but a bit more involved than say a Dyna S on a Z1000) then you should have no problem getting the timing set up statically. The bike should run well just like that, and you can take it from there?
There is a press-fit part to the Accent rotor. If you know this then it's easy enough to fit, but the instructions don't mention this anywhere and you might think it doesn't fit properly ! (but it does)