I would narrow the plug gaps to .020" and see what happens. The magneto is rebuilt by a reputable US shop. NEWS FLASH - March 2020 As you will understand, with the Covid-19 pandemic shutting down most normal business, we are not able to despatch orders for the time being. 0000007301 00000 n You need to be a member in order to leave a comment. Dual plugs provide both redundancy should a magneto fail, and better engine performance (through enhanced combustion). If it is several thousand ohms, it indicates that the HT lead is resistive and/or the plug cap is fitted with a suppressor resistor. equipment. We also sell our Brightspark range of I would also welcome information on some of the things shown in the video such as the handles on the trolley. Great write up, with video even! Thank you for your patience. tour of some of our specialised workshop It's a 6v system, so the starter turns rather slowly (maybe 80rpm), but I think it should be fast enoughto start. With the engine running, place your hand over the pick-up with the same hand also touching the magneto body. As the magnet moves with respect to the coil, the magnetic flux linkage of the coil changes. If working on your own, holding the end of the HT cable steady 6 mm from the engine is difficult when kicking the starter. If I was working on it, first I would want a 5/16" air gap consistent spark minimum from the coil terminal to ground. [5], The first person to develop the idea of a high-tension magneto was Andr Boudeville,[citation needed] but his design omitted a condenser (capacitor). Come join the discussion about performance, restorations, modifications, classifieds, troubleshooting, maintenance, and more! If the magneto wont produce a spark across a 6 mm (or 4 mm) gap at leisurely kicking speeds, and if youve satisfied yourself with all the other checks described earlier, then it probably needs a more complete overhaul. If the reading is less than 3000 ohms, it would be unusual, but is indicative of a problem. Please note: THEY ARE NOT FOR SALE! A forum community dedicated to Jockey motorcycle owners and enthusiasts. In a modern installation, the magneto only has a single low tension winding which is connected to an external ignition coil which not only has a low tension winding, but also a secondary winding of many thousands of turns to deliver the high voltage required for the spark plug(s). To all you guys with Lucas magnetos with problems, get ready to see it fully functional for about $23 shipped, along with a little work in your garage. https://www.smokstak.com/forum/attachment.php?attachmentid=294172&stc=1&d=1508717862. 0000005012 00000 n found elsewhere on the internet or in the However, typical signs of magneto problems are, among others: -- Bike hard to start. Twirl the armature. In the case of a main-body earth brush, try moistening a cotton bud with petrol, and poke it through the hole for the earth brush to clean the track while rotating the armature, but IMPORTANTLY before doing that temporarily remove or disable the contact breaker to reduce the risk of electric shock and fire. If everything were perfect and clean, the resistance should be infinite (OL). By part-exchange. I would definitely try another condenser if it were me. JRC Engineering Inc. 3110 Indian Ave Unit 1E, Perris, CA, 92571. If your multimeter can measure capacitance, the reading should be within 10% of: 150 nF (0.15 uF) for the C01, C02, C03, C05 and CU/150 EasyCaps; 220 nF (0.22 uF) for the C06, C07 and CU/220 EasyCaps.
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