Question about 2008 Yamaha Royal Star Venture
If the battery is draining while the bike is running you have a failure in the charging system. Check your alternator and your voltage rectifier. While the bike is runnning, if you put a voltmeter on the battery at idle you should get around 13-14v. If you rev the engine up to 3-4000 rpm that voltage should rise a bit, say 1/2 to 1v. If you increase your electrical load (lights, heated grips or clothing, radio, etc.) it should rise a little more.
With the bike off and the key off, put your voltmeter's red lead on each fuse in your fusebox and the black lead to ground. Are you getting any voltage? There should be none on any fuse that does not have power while the bike is off. If you find voltage, note what circuit you find it on and check that circuit for a faulty component or shorted wiring.
Good luck to you.
Posted on Jan 10, 2009
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