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VTX 1300c 2004 What should the voltage read when bike is running also should the voltage drop slightly when rev engine
 

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I would think that the voltage should be around 13.5 to 14.5 when running and should NOT change by much at all when you rev the engine. If anything, it should rise slightly when you rev the engine but the voltage regulator should minimize this change. What do others think?
 

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under a single weak cell in the battery.. it can cause the voltage regulator to under adjust voltage.... then allow voltage to return to a steady upward trend...

a standard CAR 100 amp load test at an auto parts store can prove a faulty battery.

a proper test of the charging system Must have a Good battery to proceed
 

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You no now that Blaine C mentioned regulator it refreshed my memory. The previous owner replaced the regulator with a inexpensive regulator from china so very well could be the problem I will let you know if that is the problem as soon as I figure it out can't I will use my volt meter to see what reading I get out of the regulator.
 
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