Classic motorcycles | ignition timing | BMW R25 ignition upgrade | ASMR

Electrical System Overview
Classic motorcycles have a very old ignition system. replacing this with a more hassle-free system is necessary to prevent it from letting you down.
Classic motorcycles | ignition timing | BMW R25 ignition upgrade | ASMR
The BMW /2 motorcycles have what could be viewed as two electrical systems - one for the engine
(ignition), and one for all the extras such as lights and the horn.
The ignition system consists of the magneto, coil, points and the sparkplugs. The ancillary system
includes all the bulbs, the battery, generator, horn, and switchgear.
Because of this separation, it is possible for the engine to run quite happily despite major faults in the rest
of the wiring system. Early electrical components weren't very reliable, and this was a major reason why
many vehicles, and motorcycles in particular, had this kind of separation.
However, after the Second World War, other vehicle manufacturers started moving towards the coil
system of ignition, and integrating the electrical systems together.
BMW remained with the split electrical system for some years, only changing to coil ignition and a single
electrical system when the /5 motorcycles were released in 1970.
The Magneto
BMW equipped the /2 motorcycles with magnetos. These are the devices which build up the charge in our
simple description of the ignition system.
Magnetos had two great advantages over coil ignition at the time:
1. They were much more reliable than early coils. (This is not an issue any more, and probably
wasn't an issue by the 1960's either.)1
2. The spark gets stronger as revolutions increase. Coil ignitions get a weaker spark at high revs -
this is the reason why even today many racing engines use magneto ignition systems.
On the downside, magnetos were significantly more expensive to make, and a great deal heavier.
A magneto is made up of a magnet turning within a coil, creating an alternating current. The current is
interrupted when the ignition points are opened, and the collapse of the current causes a voltage spike in a
low tension coil - which is transformed by a high tension coil to give sufficient voltage for the sparkplug.
Since the current is generated by the magnet turning within the coil, the spark is at its weakest when the
engine is turning slowly, and at it is strongest at high revolutions. For example, when turning it on the
kickstarter, a comparatively weak spark is produced.
Unfortunately this is exactly when a strong spark is desired - this means that for easy starting, especially in
winter, accurate setting of the magneto and ignition timing is required.
The Points
The points are fixed to the magneto, and are driven by the cam on the advance/retard unit. The ignition
fires when the points are opened. They must be kept clean and dry - take care not to use so much grease
on the lubricating felt that it gets onto the points.
Since there is only one set of points, both the sparkplugs fire together. The engine doesn't explode
because only one cylinder has air/fuel - the other cylinder is in the exhaust stroke.
The Capacitor (Condenser)
The capacitor has two functions. When the points open, the current will try to jump the gap, and would
spark violently. These sparks would quickly damage the points, and they would also delay the current cutoff and reduce the strength of the spark. The capacitor helps to smooth these out.
The other function of the capacitor is to provide a relatively long discharge, so that the spark is maintained
long enough to ignite all the fuel/air mixture.
Normal capacitor values are between 0.1 and 1 µF. These values are not critical, as they are a compromise
between a high value for low revs, and a low value for high revs.
ignition upgrade
Hello everyone! Welcome to our channel! Here, you can find the most incredible restoration, tips and hacks for your projects, super satisfying machines, and workers who make their job no perfectly you won't believe they are real. Be ready to have your mind blown. If any of this is your thing, subscribe to keep up with us, we upload several videos each week. Thanks for watching!

[@engincan9506]

Merhaba hangi manka sistemi kurdunuz cdi beyin bobin ve regülatör

[@giorgosmosxos279]

6 ν είναι η 12ν και από που το αγόρασες και πόσο κοστίζει;

[@georgetrakadas8595]

Δώδεκαβολτο χωρίς την ανάγκη της μπαταρίας όπως τα R51

[@viggo48sam]

Vedligeholdsfri tænding +Dynamo 👍🏁❤️🇩🇰

[@ariskristiyono8710]

Good bro, pakai kelistrikan apa salut, ane pakai spul grand aki terkor

[@satkosulejman4923]

Buraz koja je to struja ?
Gdje si je nabavio ?
Koliko košta ?
Super zvuk ! Volim kako si ga sredio.
Mašala ! 💎

[@altuspotgieter5497]

Hello, where can I order the ignition upgrade kit??

[@arifmantar9131]

Usta eski günleri özlemiş eline sağlık

[@osmancevik4973]

Ellerine sağlık usta

[@satkosulejman4923]

Bravo majstore svaka čast👍