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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
hesitation when accelerating
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<blockquote data-quote="Tom Gaynor" data-source="post: 14493" data-attributes="member: 4034"><p>Sounds as though you've solved your problem. Next time get Doug Wood (in Pennsylvania) to rebuild it for you, contact through jtan. Doug has a solid reputation for building Vincent magnetos that work. And for KHS - knowing his sh*t. </p><p>Another possible cause is the Lucas ATD. These were built down to a price that BSA et al were prepared to pay, and, consequently, at about 30,000 miles, need to be replaced. I personally don't believe they can be overhauled, then work. Roy Price, advertises in MPH, will oblige.</p><p>What happens is that they are fully retarded at starting, so the bike starts, then instead of gradually advancing ignition as one accelerates, stick, then go straight to full advance. The bike starts and ticks over, the bike runs, but between the two...</p><p>In my box of Vincent bits I have FIVE alloy idlers, all one tooth short, and SEVEN Lucas ATD's, all useless. Go figure.</p><p>My Roy Price ATD works very, very well: better still must be the Pazon solid state system, apparently available for Vincent, but only for a coil-based system.</p><p>Choices, choices...the tyranny of choice...</p><p></p><p>Tom</p></blockquote><p></p>
[QUOTE="Tom Gaynor, post: 14493, member: 4034"] Sounds as though you've solved your problem. Next time get Doug Wood (in Pennsylvania) to rebuild it for you, contact through jtan. Doug has a solid reputation for building Vincent magnetos that work. And for KHS - knowing his sh*t. Another possible cause is the Lucas ATD. These were built down to a price that BSA et al were prepared to pay, and, consequently, at about 30,000 miles, need to be replaced. I personally don't believe they can be overhauled, then work. Roy Price, advertises in MPH, will oblige. What happens is that they are fully retarded at starting, so the bike starts, then instead of gradually advancing ignition as one accelerates, stick, then go straight to full advance. The bike starts and ticks over, the bike runs, but between the two... In my box of Vincent bits I have FIVE alloy idlers, all one tooth short, and SEVEN Lucas ATD's, all useless. Go figure. My Roy Price ATD works very, very well: better still must be the Pazon solid state system, apparently available for Vincent, but only for a coil-based system. Choices, choices...the tyranny of choice... Tom [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
hesitation when accelerating
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