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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Ignition coils for Grosset set up
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<blockquote data-quote="vince998" data-source="post: 126862" data-attributes="member: 261"><p>I´ve just re-discovered this thread, and thought i would give an update.</p><p>The ignition failures i had (which probably caused Francois to blame the Dyna coils in the first place) were all down to my own stupidity.</p><p>My Battery is an 12V AGM type, stood on it´s end, in an old hollowed out 6V exide battery. At some point i changed to another type which needed a little more space vertically. Having no room to move up, i removed the base of the old exide casing so that the new battery was sat directly on the metal battery platform, with the exide cover over it. Because i was still running pos earth at this point (before the electronic ignition was fitted), i had the + terminal of the battery at the bottom. Francois only makes ignition systems poled for neg earth. No problem i thought, changed everything necessary over (and sourced a new neg earth electronic regulator for the dynamo).... But forgot to turn the battery around so that the neg terminal was at the bottom. I noticed the very faintest of charring on the washer behind the screw head on the pos terminal at some point, and thought, "Thats funny, it´s been shorting?". Bingo!!. Since then, no further problems. I have since changed the 3 Ohm double Dynas for generic Japanese 5 Ohm coils in an attempt to sink power consumption and give the dynamo an easier life. These coils are still working faultlesly as is the rest of the ignition system. The only problem i have had in the last 10 years is a sheared spring pin on the drive shaft (the one that holds the ATD in position). Francois has since changed the design of this item so it shouldn´t happen again.</p></blockquote><p></p>
[QUOTE="vince998, post: 126862, member: 261"] I´ve just re-discovered this thread, and thought i would give an update. The ignition failures i had (which probably caused Francois to blame the Dyna coils in the first place) were all down to my own stupidity. My Battery is an 12V AGM type, stood on it´s end, in an old hollowed out 6V exide battery. At some point i changed to another type which needed a little more space vertically. Having no room to move up, i removed the base of the old exide casing so that the new battery was sat directly on the metal battery platform, with the exide cover over it. Because i was still running pos earth at this point (before the electronic ignition was fitted), i had the + terminal of the battery at the bottom. Francois only makes ignition systems poled for neg earth. No problem i thought, changed everything necessary over (and sourced a new neg earth electronic regulator for the dynamo).... But forgot to turn the battery around so that the neg terminal was at the bottom. I noticed the very faintest of charring on the washer behind the screw head on the pos terminal at some point, and thought, "Thats funny, it´s been shorting?". Bingo!!. Since then, no further problems. I have since changed the 3 Ohm double Dynas for generic Japanese 5 Ohm coils in an attempt to sink power consumption and give the dynamo an easier life. These coils are still working faultlesly as is the rest of the ignition system. The only problem i have had in the last 10 years is a sheared spring pin on the drive shaft (the one that holds the ATD in position). Francois has since changed the design of this item so it shouldn´t happen again. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Ignition coils for Grosset set up
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