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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
ATD Springs
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<blockquote data-quote="Big Sid" data-source="post: 43524" data-attributes="member: 2781"><p>As for the benefit of critically selected return springs strength and the effect on general running smoothness and power on a street motor my guess is it's little . If all is free and the mechanism nicely returns to full retard for a satisfactory idle and kickback free starting then peace will reign . There's little more to be had by trying to match the springs to the motors needs beyond that . </p><p> Where the compression is higher than std and a tendency to pink at low revs is noticed then a little firmer spring might suppress this by retarding the advance curve . I had to do this on our Vincati to obtain the sweetness I desired from this highly tuned motor . </p><p> Took quite a bit of matching up the springs and the advance weights to acheve it but eventually I did and all was lovely . This was however with a Series D Dist . Unit and not a magneto s ATD . Sid .</p></blockquote><p></p>
[QUOTE="Big Sid, post: 43524, member: 2781"] As for the benefit of critically selected return springs strength and the effect on general running smoothness and power on a street motor my guess is it's little . If all is free and the mechanism nicely returns to full retard for a satisfactory idle and kickback free starting then peace will reign . There's little more to be had by trying to match the springs to the motors needs beyond that . Where the compression is higher than std and a tendency to pink at low revs is noticed then a little firmer spring might suppress this by retarding the advance curve . I had to do this on our Vincati to obtain the sweetness I desired from this highly tuned motor . Took quite a bit of matching up the springs and the advance weights to acheve it but eventually I did and all was lovely . This was however with a Series D Dist . Unit and not a magneto s ATD . Sid . [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
ATD Springs
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