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FJR Motorcycle Forums
Technical & Mechanical Problems
getting it right the first time
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<blockquote data-quote="Bounce" data-source="post: 283115" data-attributes="member: 257"><p>You don't want to ground back to the chassis. The FJR's R/R is a shunting type; the alternator puts out max (per RPM) at all times and shunts the excess to the chassis. Any chassis ground item will pick up that shunted power as noise and you'll hear it as alternator hum in your audio stuff while certain items like a PC3 might get a little whacky on you due to the noise. Others have also reported different tested readings of grounding to the front of the chassis compared to ground to places out back.</p><p></p><p>Run a ground block back to the neg on the battery and you'll avoid any ground loop noises.</p><p></p><p>I originally ran my ground block to the bolt that holds the R/R in place. When I rerouted the wire back to battery (-) all my audio noise went away slick as snot.</p></blockquote><p></p>
[QUOTE="Bounce, post: 283115, member: 257"] You don't want to ground back to the chassis. The FJR's R/R is a shunting type; the alternator puts out max (per RPM) at all times and shunts the excess to the chassis. Any chassis ground item will pick up that shunted power as noise and you'll hear it as alternator hum in your audio stuff while certain items like a PC3 might get a little whacky on you due to the noise. Others have also reported different tested readings of grounding to the front of the chassis compared to ground to places out back. Run a ground block back to the neg on the battery and you'll avoid any ground loop noises. I originally ran my ground block to the bolt that holds the R/R in place. When I rerouted the wire back to battery (-) all my audio noise went away slick as snot. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
getting it right the first time
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