My MD2 is very unreliable. I’m trying to work out if its worth fitting an electronic ignition system or have it reconditioned, I believe there is a kit that fits into an MD2. Has anyone had experience of these in a Scott ? Does the charging side of the MagDyno need to be 12 Volt /6 Volt ?. I’ve always liked the idea that a Magneto will run the bike without battery etc. Kind regards 😐
Which part of it is unreliable , the dynamo or the magneto ?
The dynamo can be made to be used on 6 or 12 volts with a solid state regulator.
some modern electronic ignition conversions only draw a small current , so in the event of a charging failure you should be able to do many miles before the battery is discharged
The Magneto, sometimes it will give a really bright spark an can jump 1/4″ other times it gives a very weak spark or none. So probably needs a rewind.
Mags are a known quantity, and a pro rebuild will probably see it outlasting you. The new electronic conversions, although some swear by them (well they would, wouldn’t they 🙂 ) are still under “long-term testing” and need to be used for a few more years yet before the general reliability is established.
I’d stick with the (rebuilt) mag and dyno, personally.
Magnetos suffer from wear and tear, coils, brushes, points ,as they have to work quite hard to produce a good spark at the correct time.
Electronic ignition systems have been around since the 1970’s, of which I have several examples, their main attribute is that they have no abrading parts , so no wear and adjusting necessary, and are not subject to water ingress .
I assumed (probably wrongly) that the OP was talking about the “electronic magnetos” current on offer rather than generic electronic ignition systems, but if it is some conversion to the generic (Piranha, Boyer, Electrex et al) electronic system,then again, I think I’d prefer a mag and not rely on a fully charged battery that these systems rely on.
Granted, the old mag does have wearing/rotating and adjustable maintenance components, but given the mileage of our old bikes that’s really not a problem. In fact, it becomes a part of the pleasure of old bike ownership, along with topping up the rad and checking oils and chains tension, etc etc.
I’d buy another Honda otherwise. 🙂
Thanks for the feed back, so probably best to get my magdyno reconditioned / rewound , thanks again.
Just my personal experience: I went down the electronic route a couple of years ago. Disaster! The supplier even posted a nasty libellous comment on here about it. In the end I coughed up and had the mag done for little extra cost. I recommend Paul Ledford in Shaftesbury. It transformed my Scott.
I suppose that the main problem with a magneto on a Scott is that it spins at engine speed, twice as fast as a mag on a four-stroke engine, so mechanically and electrically, they have a hard life. Compare it to the mag on single-cylinder four-stroke, it is spinning twice as fast and having to produce four times as many sparks !!
Maybe modern insulation on the secondary HT winding helps, were they originally coated with shellac ? probably synthetic now hopefully it doesn’t break down so easily, and keeps any moisture out. Does the cycle of discharge/heat generation cause the copper to become brittle and subject to fracture etc.( which as Brian points out is 4 times that of a 4 stroke single) better stop NOW !! as I’m starting to sound a bit NERDY 😳
If a mag needs one (or possibly two) rebuilds to keep operating for maybe seventy plus years then I think we can disregard any worries about the longevity of the copper, working harder than a four stroke, etc!
I totally agree. Probably the biggest danger to our mags is the amount of time they spend doing nothing.