Ariel Owners Motorcycle Club

HI ALL i see on my mag their is a earthing point is it worth putting a wire to it and earth it to the engine or what is the idea of this earth point

Well worth doing, especially if you've been painting things. It'll help both the mag spark
and the dynamo generate.

Don't forget there are two brushes in the magneto. One feeds the HT lead and the other,
at the other end of the mag, is the 'official' return for the current that went off to make the spark.

It's there, along with the paper cups which the magneto bearing outer races sit in, to stop
that returning current from eroding the magneto bearings

The 4 terminals on your regulator unit read FADE. The"E" has to have a good contact with the case of the generator or it won't work. Nev

Hi Johnny

Are you getting confused by the kill terminal which is sometimes present on the points cover of the mag? this is normally connected to a push to contact switch and on to earth, it's purpose is to kill the engine when the switch is pressed.

In my experience the mag earths via the brush at the drive end and onward through it's body and mounting fasteners to the engine. If your mag doesn't mount directly to the engine and you've insulated it's mount, (with paint or powder coat for example), you coul;d run a bonding strap from one of the mounting bolts to the engine.

Regards Mick

I'd use the earth point on a single but have never bothered on a twin. The K2F is flange mount and should get a decent earth to the engine; the magdyno earth to the engine is questionable - the foot sits on a painted plate, and the 'connection' to the timing chest has a big rubber gasket...

HI Simes i will make a earth wire and i am going to run it to the engine plate below the the mag their is a 1/4" bolt i will use it to fit to thank you for your replies and KEEP SAFE

HI Mick i am going to fit a engine cut out as well like you say from the mag to a switch thank you and KEEP SAFE

HI ALL I have fitted a earth to the mag today and i think the mag has now got a better spark at the plug i not yet run it to try the charging but i think it will be better thank you all for your posts and you all KEEP SAFE

Where did you tie it to Johnny? That crankcase stud near the magneto earth?

Go from the Mag base to the 1/4 26 tpi bolt under the seat and the regulator and run a good earth past the steering head bearings, and your hinged mud guard at the rear to the taillight body. That will take care of all your earthing. Nev