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Discussion Starter #1
I just installed a small amp to give the sound a boost over the exhaust. Not a lot of money so I went for a cheap unique cycle 300w unit. I ran a direct line to the positive with 16 ga. solid copper. The ground is their wire to the frame. Started it up and constant interference. So I thought maybe the power was too small a gauge so I ran a pc of 12ga solid copper, but still the same noise. Did the same for the ground. No luck. Anything else I should be looking at?
 

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What does the interference sound like, is it only present with the bike on and engine running, does it change with the engine rpm?

Sent from my SPH-L710
 

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Discussion Starter #4 (Edited)
it's spark plug interference. It goes up and down with the throttle. You can hear the motor in a low buzzing. I have it grounded to one of the inner fairing mounting bolts, just below the hooks to hang the fairing.
 

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Discussion Starter #6
I was thinking about running a ground back, but didn't know if totally isolating it was a good idea.
 

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Discussion Starter #8
will give it a shot. I was so aggravated I said screw it and disconnected the ground and power, put the fairing back on so I could ride.
 

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Your isues is a ground loop. Following Rig Magician's advise will solve the issues. Also, I'd replace the 16 gauge solid "hot" wire with a 10 gau stranded. If the amp is truly pulling 300w you may have issues with the wire overheating and a potential fire hazard.

Good luck and good riding.

Bobby
 
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