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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Lucas K1F magneto weak spark
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<blockquote data-quote="greg brillus" data-source="post: 138613" data-attributes="member: 597"><p>I have had a few magnetos, and some that have been freshly rebuilt, that put out a week spark at low rev's......... This at kicking speeds........the culprit ended up being the main armature had been machined over its length to "True up everything" this results in the armature having a smaller OD than an original one by say 10 or 20 thou........This will loose a lot of the magnetic build strength and the magneto becomes useless for starting.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 138613, member: 597"] I have had a few magnetos, and some that have been freshly rebuilt, that put out a week spark at low rev's......... This at kicking speeds........the culprit ended up being the main armature had been machined over its length to "True up everything" this results in the armature having a smaller OD than an original one by say 10 or 20 thou........This will loose a lot of the magnetic build strength and the magneto becomes useless for starting. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Lucas K1F magneto weak spark
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