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Magneto coil conversion

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Mick Bailey	07/09/2022 15:21:11
61 forum posts	Here's an update on the Thorspark; Fitting everything was straightforward and my friend had already located the coil, so it was just a case of replacing the points and ring cam with the pickup unit and wiring everything up. A little consideration needed to be given to routing the wires, as well as providing a much better earth from the battery to frame. We roughly timed it and got a fat spark right away and now the bike starts first kick. Strobing the bike was not entirely successful; I'd marked the engine-speed alternator with TDC and 36 degrees full advance, but could not get a static view of the marks - they were shifting all over the place. I did notice though that the engine pulley serial number strobed up fine, with a stable image. I assume this must be due to slack in the belt drive. We were running out of time so will leave strobing until another day. The bike was running so well with the initial timing that we left it to see how it performs on the road. The earth brush and main HT pickup were removed from the mag, so the armature is now just a drive shaft that rotates the magnet assembly.
gary	07/09/2022 15:52:23
164 forum posts 37 photos	we.ll done and good luck. gary
Chris Evans 6	07/09/2022 19:57:18
2156 forum posts	Well done, after years of service my Thorspark equipped BSA still starts first kick.

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