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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Lucas KVF Rebuild - UK Recommendations?
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<blockquote data-quote="oexing" data-source="post: 177919" data-attributes="member: 1493"><p>The Lucas SR type is the supposedly superior rotating magnet type, post war, but no a/r device on it. And still I do not believe in the religion about positive or negative sparks to be vastly different, on any twins with mags you get changed polarities all the time for the plugs. Only singles can have same pole on the single plug from the breaker with only one cam. So converting a single mag for a twin is possible as the magnet inside is the same . Certainly having it on a v-twin will be same trouble like with the original, the rotor/armature is not asymmetric typically for the 50 degree twin mags I guess.</p><p> I am not clear what it means when shifting max. flux to the front pot. Sure the situation will not be optimum for the rear pot, would think it will be similar to present state with the front pot ?? With a manual timing system I´d think the cam race is an extra component that could be set in a better position in its housing that has the Bowden wire. Would that help getting the firing point to the position of max flux for the desired pot? No clue at the PC at this time . . . . . .</p><p> For my B Rapides I did a complicated mod using the VW Vertex 4 cyl magnetos. Fat sparks certainly, does not matter much if spun one way or other. Same dilemma, you can not get same max flux when modding it for a v-twin but the mag is that strong it does not matter. Below a YT clip I did with the Vertex.</p><p></p><p> Vic</p><p>YT Vertex:</p><p><a href="https://www.youtube.com/watch?v=-39h3P-ayjo" target="_blank">Vertex</a></p></blockquote><p></p>
[QUOTE="oexing, post: 177919, member: 1493"] The Lucas SR type is the supposedly superior rotating magnet type, post war, but no a/r device on it. And still I do not believe in the religion about positive or negative sparks to be vastly different, on any twins with mags you get changed polarities all the time for the plugs. Only singles can have same pole on the single plug from the breaker with only one cam. So converting a single mag for a twin is possible as the magnet inside is the same . Certainly having it on a v-twin will be same trouble like with the original, the rotor/armature is not asymmetric typically for the 50 degree twin mags I guess. I am not clear what it means when shifting max. flux to the front pot. Sure the situation will not be optimum for the rear pot, would think it will be similar to present state with the front pot ?? With a manual timing system I´d think the cam race is an extra component that could be set in a better position in its housing that has the Bowden wire. Would that help getting the firing point to the position of max flux for the desired pot? No clue at the PC at this time . . . . . . For my B Rapides I did a complicated mod using the VW Vertex 4 cyl magnetos. Fat sparks certainly, does not matter much if spun one way or other. Same dilemma, you can not get same max flux when modding it for a v-twin but the mag is that strong it does not matter. Below a YT clip I did with the Vertex. Vic YT Vertex: [URL='https://www.youtube.com/watch?v=-39h3P-ayjo']Vertex[/URL] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Lucas KVF Rebuild - UK Recommendations?
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