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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Lucas KVF 50
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<blockquote data-quote="Cyborg" data-source="post: 117973" data-attributes="member: 3426"><p>I’m not the person to ask about what came on Lightenings, but my understanding is that they all came with KVF TT.</p><p>You can get decent performance out of the KVF. As for changing the end housing.... using the manual advance makes running the tach drive easier. The KVF TT came with a slack wire advance, but you could find an end housing (either slack wire or tight wire) that will fit the KVF 50. You will have to modify your KVF 50 cam ring. It will require a wider notch to allow it to rotate for advance/retard and another notch for the manual advance linkage. That all has to be done with great care. Retard too far and the carbon brush for the HT pickup will be off the end of the brass on the slip ring. That will cause arcing that will fry things in short order. I think you will have to search for a while to find a slack wire end housing for the KVF. There was one used on a Royal Enfield, but don’t recall which model. There is a fellow on Ebay that sells new “CNC” ones and claims they fit on a KVF, but they do not. The bearing bore, mounting shoulder and cam ring housing are also not concentric. All 3 are off in relation to each other.... at least the one that I bought was.</p></blockquote><p></p>
[QUOTE="Cyborg, post: 117973, member: 3426"] I’m not the person to ask about what came on Lightenings, but my understanding is that they all came with KVF TT. You can get decent performance out of the KVF. As for changing the end housing.... using the manual advance makes running the tach drive easier. The KVF TT came with a slack wire advance, but you could find an end housing (either slack wire or tight wire) that will fit the KVF 50. You will have to modify your KVF 50 cam ring. It will require a wider notch to allow it to rotate for advance/retard and another notch for the manual advance linkage. That all has to be done with great care. Retard too far and the carbon brush for the HT pickup will be off the end of the brass on the slip ring. That will cause arcing that will fry things in short order. I think you will have to search for a while to find a slack wire end housing for the KVF. There was one used on a Royal Enfield, but don’t recall which model. There is a fellow on Ebay that sells new “CNC” ones and claims they fit on a KVF, but they do not. The bearing bore, mounting shoulder and cam ring housing are also not concentric. All 3 are off in relation to each other.... at least the one that I bought was. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Lucas KVF 50
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