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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Aftermarket magneto slip rings
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<blockquote data-quote="Ken Targett" data-source="post: 46391" data-attributes="member: 521"><p>I totally agree with just about everything you've just said, Magnetoman.</p><p></p><p>As it happens, when I'm doing quality control checks on the slip rings and pick-ups that we sell, I choose a free weekend and leave the component on the slip ring/pick-up tester all weekend, which as it happens is about 60 hours.</p><p></p><p>The problem with using just a coil tester like the Merc-o-tronic or Eisemann to test an armature's slip ring is that it's no good if the armature windings have also failed. Customers who'd sent us their mag for servicing/repair would find it annoying if, after they'd agreed to a rewind costing £X, we then went back to them after the rewind to say that the slip ring had failed and was going to cost another £Y to replace. Admittedly, it's not always possible to diagnose everything that's wrong with a magneto from an initial assessment, but we try as much as possible to avoid hikes in the initially-estimated cost part way through the job.</p><p></p><p>Good luck, Magnetoman, in your quest to find some testing method for predicting future failure of a slip ring without using specialised equipment. Must admit I can't think of any way of doing it. In the meantime, people are going to need to rely on traders' reputations and what they have to say about their wares. A good thing about forums like this is that if somebody is dissatisfied with a magneto spare they've actually bought, or service they've received, they can tell the whole world about it.</p></blockquote><p></p>
[QUOTE="Ken Targett, post: 46391, member: 521"] I totally agree with just about everything you've just said, Magnetoman. As it happens, when I'm doing quality control checks on the slip rings and pick-ups that we sell, I choose a free weekend and leave the component on the slip ring/pick-up tester all weekend, which as it happens is about 60 hours. The problem with using just a coil tester like the Merc-o-tronic or Eisemann to test an armature's slip ring is that it's no good if the armature windings have also failed. Customers who'd sent us their mag for servicing/repair would find it annoying if, after they'd agreed to a rewind costing £X, we then went back to them after the rewind to say that the slip ring had failed and was going to cost another £Y to replace. Admittedly, it's not always possible to diagnose everything that's wrong with a magneto from an initial assessment, but we try as much as possible to avoid hikes in the initially-estimated cost part way through the job. Good luck, Magnetoman, in your quest to find some testing method for predicting future failure of a slip ring without using specialised equipment. Must admit I can't think of any way of doing it. In the meantime, people are going to need to rely on traders' reputations and what they have to say about their wares. A good thing about forums like this is that if somebody is dissatisfied with a magneto spare they've actually bought, or service they've received, they can tell the whole world about it. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Aftermarket magneto slip rings
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