Question about 2003 Yamaha Royal Star Venture

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How do I replace the magneto, I am only getting 12 v. out of my battery, and when I disconnect the pos cable it dies, so the magneto must be gone.

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There r no magnetos on modern road bikes-that stoped in '69 when the law stated u had to hav lites if bike was off. u hav a alternator with a coil ignition. the bike needs batt at all times or else spark dies

Posted on Jan 04, 2010

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First off that is not how you check your "charging system" not a magneto! on these bikes you have a Stator that is in the LH side cover on that engine and you need to check the windings for continuity and for short to ground. I would consult a local dealer for voltage output test spec's on the stator. next is the regulator rectifier, this can be tested with a meter and again consult your dealer.

when checking battery voltage while running it is common to have to bring the engine up to a higher speed than idle when testing the charging system, I would advise around 2500~2800 rpm and expect voltage to be 13.5~14.5 volts.

Posted on Jan 03, 2010


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