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Starting Member
Group: Forum Members
Last Login: 5/27/2006 2:31:29 AM
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| static in radio when bike is running but not any other time an its getting worse 2002 flhtci
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Senior Member
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Last Login: Yesterday @ 4:51:02 PM
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Usually that happens on AM. But if it happens on FM too...you need a filter. Check the electronic stores....they may be able to help you.
Something on the bike is sending some sort of signal...like the spark plug caps or wires or something. I think the electronic weenies call that a "leak". That's why it only happens when the motor is running. Or maybe the radio itself is faulty. LOTS of things.....g'luck.
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Average Member
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Last Login: 2 days ago @ 7:10:34 AM
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If the problem was on a car. I would suggest, buying new plug wires, as the wires age they start to leak. The wire that usually has the most wear is the coil wire. Buy the high quality type, I think the silicone ones. Usually the original manufacture ones are of higher quality then after market ones.
But I don't know if they make different grades of wires for a bike.
New wires may still be the easiest and least expensive starting point.
Radio Shack sells a filter that goes between the coil and coil wire for the older style coil systems on cars, but on a bike,???
You might see if Radio Shack has one that goes into the wiring for the radio.
Gfurlo
Gfurlo
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Advanced Member
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Last Login: Yesterday @ 2:39:21 PM
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Normally an isolation filter fixes the problem of alternator whine in your radio. If the noise changes with your RPMs then the filter will work. Just static I'm not so sure of.
Torqueman
Battle Creek, MI
V-Strom 06
Goldwing 03
Torqueman
Battle Creek, MI
V-Strom 06
Goldwing 03
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Junior Member
Group: Forum Members
Last Login: 11/13/2008 2:08:59 PM
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Spark plug "noise" exists across a wide frequency spectrum and is easily picked up by the radio antenna. By locating the antenna to the rear of the bike it can be minimized, but usually not totally eliminated.
A noise filter will attenuate any noise, alternator whine or spark plug noise coming in via the power wires, but it's most effective for alternator or generator noise.
Resistor plug caps are common on Jap bikes and they usually have a 5K ohm resistor built in and they often connect to conventional ignition (non-resistive) wires. You can check them fairly simply with an ohmmeter. Measure from plug cap to plug cap on "paired" cylinders, that is cylinders fired by the same coil. On Jap bikes it's usually 1 paired with 4 and 2 paired with 3. Resistance should be the total of two plug caps (5K ohms each) and the coil's secondary resistance, usually about 15 - 20 K ohms. The total resistance then would be about 25 - 30 K ohms.
If you find an open circuit plant to replace ALL the plug caps, they're only about $4.00 each and they do fail with time and mileage.
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