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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
ignition
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<blockquote data-quote="b'knighted" data-source="post: 32875" data-attributes="member: 59"><p>As I didn't steal it from the car I don't actually know its origin, but I am sure it was a standard 4 cylinder. What twins did they make? It has a triangular flange fitted to bolt on as per mag, and its shaft has an adapter to take an ATD pinion. Its bob weights retard it to a point which makes for easy starting and it doesn't pink as I time it at full advance. As it starts well I assume that the range of advance is about right. It was originally built for use on a highly tuned Shadow probably running five star petrol so I'm surprised that its range isn't too much.</p><p>The guy who built it to convert his bike to coils bought his bike in 1958 and reverted to standard 30 years later so guessing the age of the donor vehicle is difficult. I suspect it was 100e or 105e era. His evil Shadow was timed at 135 in third. I think I understand why he softened it once he was into his forties.</p><p>I use a 4 cylinder distributor cap with two opposite pickups cut out and replaced with plastic numberplate bolts. The tip of the rotor arm has been replaced with a longer contact area to compensate for the uneven firing of the vee twin. The cap and rotor arm were done in the seventies and I really wish I knew what model they were intended to fit as I would quite like to have spares on the shelf. If my Lumenition system (bought in about '72, for a tweaked Morris Minor) fails I will go the MOIRA route.</p></blockquote><p></p>
[QUOTE="b'knighted, post: 32875, member: 59"] As I didn't steal it from the car I don't actually know its origin, but I am sure it was a standard 4 cylinder. What twins did they make? It has a triangular flange fitted to bolt on as per mag, and its shaft has an adapter to take an ATD pinion. Its bob weights retard it to a point which makes for easy starting and it doesn't pink as I time it at full advance. As it starts well I assume that the range of advance is about right. It was originally built for use on a highly tuned Shadow probably running five star petrol so I'm surprised that its range isn't too much. The guy who built it to convert his bike to coils bought his bike in 1958 and reverted to standard 30 years later so guessing the age of the donor vehicle is difficult. I suspect it was 100e or 105e era. His evil Shadow was timed at 135 in third. I think I understand why he softened it once he was into his forties. I use a 4 cylinder distributor cap with two opposite pickups cut out and replaced with plastic numberplate bolts. The tip of the rotor arm has been replaced with a longer contact area to compensate for the uneven firing of the vee twin. The cap and rotor arm were done in the seventies and I really wish I knew what model they were intended to fit as I would quite like to have spares on the shelf. If my Lumenition system (bought in about '72, for a tweaked Morris Minor) fails I will go the MOIRA route. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
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