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Backfiring

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Old Jan 11, 2006 | 12:24 PM
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GB Fat Boy's Avatar
GB Fat Boy
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Default Backfiring

Sportster Custon 02. When the bike gets wet it will backfire and stall. For troubleshooting reasons I cleaned carb and filter. I washed the bike with Carb covered and it still backfired at start up. The plugs are new and gaped to spec. The next thing I was going to look at is the electical system by checking for voltage leaks in plug wires and coil. Does anyone have any idea what would be wrong? On a seperate note: The spedometer is all over the map and sometimes quits all together.
 
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Old Jan 11, 2006 | 04:47 PM
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bobcowan
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Default RE: Backfiring

Cracked coil case, in the front between the towers. Been there, done that.

Get the bike warm. Get rpm's up to about 2,000-3,000 rpm's. Spray water directly on the coil front.
 
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