COIL

Bernhard · Post by **Bernhard** » Sat Dec 10, 2011 9:52 am

Not really a 305 topic, but can anyone please tell me what the ‘’coil ‘’ at the top of this picture is or does?
It came of a Honda C90/C50
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davomoto · Post by **davomoto** » Sat Dec 10, 2011 8:48 pm

It doesn't do anything! There may have been a different model that used the same stator, only with all 3 wound.

Davo

Bernhard · Post by **Bernhard** » Mon Dec 12, 2011 6:37 am

davomoto wrote:It doesn't do anything! There may have been a different model that used the same stator, only with all 3 wound.

Davo

I find that hard to believe, is it by any chance a ballast resistor?

G-Man · Post by **G-Man** » Mon Dec 12, 2011 8:21 am

No

There are no coils on it, just laminated strips. It's probably there just to complete the magnetic 'circuit' with the rotor. British alternators usually have a continuous core but these are separate.

A ballast resistor would have a winding and would certainly have some electrical connections to it.......

G

LOUD MOUSE · Post by **LOUD MOUSE** » Mon Dec 12, 2011 9:37 am

Where are ya when we need ya Jensen?. .......lm

Bernhard wrote:
davomoto wrote:It doesn't do anything! There may have been a different model that used the same stator, only with all 3 wound.

Davo
I find that hard to believe, is it by any chance a ballast resistor?

jensen · Post by **jensen** » Mon Dec 12, 2011 11:39 am

Hi,

On another forum to be precise, but here I'm. I think this is due to the symmetry of the magnetic field driven by the rotor. But that's a wild guess.

Jensen

Snakeoil · Post by **Snakeoil** » Mon Dec 12, 2011 2:20 pm

I can see one coil wound with heavier gauge wire than the other. Reminds me of the discussion recently trying to sort out a charging issue on a 305 Dream a member here was having.

Any chance this is just a very small rig for charging and lights and the missing coil, to Davo's point, is used on other bikes, maybe with electric start, and that need to charge a little bigger battery?

The older Japanse Service Manuals do a great job of decribing why a system is designed as it is and how it works. But I don't think this came out of an C90 or any of it's SOHC brethren. It uses a multi-pole stator, rotor like our 305's and a set of points driven off the cam.

Maybe it came off a Cub or similar. I see a new parts bag in the background. So I don't think it "came off" anything. Are you trying to determine what bike this fits? It also looks brand new.

To be honest, it looks more like a Honda lawnmower or outboard motor part to me.

regards,
Rob

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