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Are you sure the alternator is defective, or is the upgrade really necessary? It is not too difficult a job but it requires a big strip-down of the primary which takes a lot of time. Invest in a Haynes or Clymer manual and have a good read of the procedure. Before you attempt it, be sure the task does not exceed your toolbox or skills.

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Q: How do you replace the alternator on a Harley big twin?
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