Author Topic: Ariel Huntmaster trouble with hot starting  (Read 16644 times)

Offline Rex

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Re: Ariel Huntmaster trouble with hot starting
« Reply #15 on: April 12, 2011, 07:21:20 PM »
You clearly spent some time writing that, and although some may find it helpful, it wasn't what I asked.
I would disagree with some points anyway,namely-
4)  the capacitor going o/c usually results in an extremely erratic spark, to the point that the engine all but refuses to run. The symptoms are much more extreme than cap failure on a coil/points engine system,
5) empirical evidence (both mine and a host of mag rebuilders) shows that the gradual deterioration in a mag's cap leads to hard starting when hot, and acceptable staring when cold. Clearly this will get worse until the mag becomes unuseable.
Also mags haven't needed (or used) a keeper since the days of Lucas KS/KN etc horseshoe magnet mags; after all, how would it be possible to place a keeper usefully or satisfactorily in a K2F or BTH, for instance?

It was just about giving the O/P some guidance on what is likely to be wrong with his mag; there's nothing definitive until it's inspected, as you say.

Offline Revband

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Re: Ariel Huntmaster trouble with hot starting
« Reply #16 on: April 12, 2011, 09:00:11 PM »
I give up!!!!!.

Offline R

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Re: Ariel Huntmaster trouble with hot starting
« Reply #17 on: April 13, 2011, 03:48:52 AM »
I give up!!!!!.

So you should.

In the old bike world, such tales are legion of hard-hot-starting magnetos from dud condensors.
Met a few myself........

Offline R

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Re: Ariel Huntmaster trouble with hot starting
« Reply #18 on: April 13, 2011, 03:54:51 AM »
Wots a maggie?

You obviously have not met Miss Maggie Neato ?

"Ms Maggie Neato is seen at many events, promoting BSA motorcycles and related activities. While making the Norton look respectable, she's not slumming it ..."
www.bsa.asn.au/html/gallery/maggie/index.html

Offline Rex

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Re: Ariel Huntmaster trouble with hot starting
« Reply #19 on: April 13, 2011, 09:07:48 AM »
I give up!!!!!.

What do you give up?

Offline Revband

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Re: Ariel Huntmaster trouble with hot starting
« Reply #20 on: April 13, 2011, 09:20:24 PM »
The reasons for giving up.

First post I advise a rebuild/re-magnetizing, Its then suggested the cap may be faulty. I agree, even after I agree some still want to dispute what I say even though I was agreeing.

The original poster stated a total loss of spark when trying to restart when hot, this indicates weak magnets,

I list what are the most likely faults and advise re the magnets when stripped down, still people disagree.

Any engine which is receiving a weak spark will be difficult to  start more-so when hot, most of the faults I listed will cause this problem including the capacitor.

Any magnet not working or fitted with a keeper will deteriorate, a magnetic rotor can be saved with a bit of old chain wrapped around it, magnets set in the body can be saved with a handful of nuts and bolts placed inside the housing.

I give up because it looks to me like whatever I say some just want to argue even when being agreed with.

What qualifies  me to advise on magnetos?, when I left school in the dark ages I served an apprenticeship with Lucas refurbishing them amongst other things, I later moved on into electronics.

You can now all say whatever you wish about me, I won't be coming back to look.

Goodbye.

Offline Rex

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Re: Ariel Huntmaster trouble with hot starting
« Reply #21 on: April 13, 2011, 10:24:21 PM »
Bet you already have..... :D :D

Offline Rex

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Re: Ariel Huntmaster trouble with hot starting
« Reply #22 on: April 16, 2011, 09:45:15 AM »
..and indeed he did....just 24 hours later. ;)

Gotta love a man of principle.... :D

Offline R

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Re: Ariel Huntmaster trouble with hot starting
« Reply #23 on: April 16, 2011, 11:31:58 PM »
Life is too short to worry about someone elses ailing magneto ?!!