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I recently aquired a 1967 HD Shovelhead old school Chopper and with the rebuild I am planning on putting a Magneto on it. It has a Generator, battery, points and condenser, what will the Magneto eliminate? points
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You have replaced it all except the problem part. The stator is a very weak part on most Chinese brands. The signal generator (coil outside the flywheel usually goes first. If you have a "peak reading volt meter this coil should put out 2-5 volts dc at cranking speed. It should also have some resistance reading(guessing in the 130 ohm range) when checked across the two leads with an ohmmeter. A dead one (open circuit) will have no reading at all.
That came with either battery or magneto. If the distributor is rather shallow and the ignition wires cross the middle of the cylinder head, it is battery, if the ignition is long and the wires cross above the thermostat housing- it is magneto.
That is one of the great historic motors made, but carry lots of gas!
To rebuild the primary of '72 Shovelhead is far too much to type out here. Besides, you'll need some pictures to help you identify a few things. You know the saying, "A picture is worth a thousand words". In this case, it's true. I'd suggest that you purchase a service manual. The best one that I've found is a Clymer's Manual, number M420 for Shovelhead 1966-1984. The factory manuals have been condensed so much that I think they rank second to this book. If you have a specific question, I can help there but to type out the entire process would be like me writing a book but without pictures.
We usd to rebuild alternators and we would build some of the old style 10SI Delcos with a self-exciting regulator just for this type situation. All you have to do is connect the battery wire to the stud on the alternator and you were good to go. If you can't find anything local Google "1 wire delco alternator" and you'll come up with all kinds of places to buy them. If you want a regular 3 wire they are easy to wire also. You'll need to buy a regulator plug. The regulator terminals are labeled #1 and #2. #1 is wire to a switched ignition source and #2 can be connected to the battery stud on the alternator along with the battery wire.
hi
insure the wires from the magneto are not cracked or shaved as this would discharge to earth and the ht lead from the magneto to the plug is not perished as this would create leakage to earth
Put the armature thru bolt in and back off about two turns. Smack the thru bolt hard with a hammer and the armature will release from the tapered crankshaft. You may damage the thru bolt. If so either get a new one or use a piece of all thread and a nut.
The wires from the stator portion of the magneto go to the rectifier/regulater one to each of the pins marked"s" the center pin goes to the battery.As far as the rest of the tracter you should price a wireing harness,they are not that expensive and the lay-out and plug configuration will make it fairly easy to install.
It's not charging, or the battery won't hold a charge? Get a multimeter and test the generator with the bike running, should be 13.5-14.5 volts. If you get this, you need a battery, if not need to find the bad component in the charging system.
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