Pazon rotor lost magnetism

I have a 750 Commando with a 10 year old Pazon Sure Fire ignition. It ran great for 5 years, but then the bike had been off the road 5 years. After a rebuild and finally trying to start it, I found no spark, and the malfunction seems to be down to lack of magnetism in the ignition rotor. Has anyone experienced this? I am wondering what I did to de-magnetise it. Time alone seems unlikely to cause this, no? I have a question out to Pazon if it is possible to re-magnetise it.

the two magnets are held in place with some kind of ring and should be removeable.
doesnt pazon sell the rotor as a spare part?

http://decentcycles.com/the-decent-store


Scroll down to the rotor. My 20+ year old Boyer had a week spark and a new rotor brought it back.

If you are going to put your bike in long term hibernation its best to remove the rotor and fix a steel nut to each magnet. Magnets will degrade if they don't cling onto something.

Cheers,

cliffa.

cliffa said:

If you are going to put your bike in long term hibernation its best to remove the rotor and fix a steel nut to each magnet. Magnets will degrade if they don't cling onto something.

Cheers,

cliffa.

Click to expand...

On the Pazon Surefire rotor the round magnets are held in by a STEEL circlip. You really should not need to do that!

Some magnets can be re-magnetised !

Thanks, when I emailed Pazon, Andy replied the next day and said they have only had one or two others do this. I have the same ignition on a Triumph T100 and pulled the rotor from that and the Norton started second kick.
I am grateful for the troubleshooting steps listed on the Pazon web site that allowed me to diagnose the problem and still think it is a great ignition. Pazon sell rotors separately, and Andy offered to replace the magnets in mine, but advised against trying to remagnetize the current ones.
I am just a little curious as to why this happened. I guess I don't know enough about magnetism to understand it. I had the rotor underneath a bench sort of close to where a wire feed welder was operating, but it's not like I did a ton of welding in the interval.
My son watches a show "Stranger Things" where magnets lost magnetism due to the presence of aliens and an alternate dimension. So I guess there's that.
Brendan