Question about 2004 Harley Davidson XL 1200 C Sportster Custom
Anytime you have an electrical problem, the first place to start is the battery. Motorcycles are notoriously hard on batteries due to vibration. Remove the battery and take it to an automotive parts store and ask them to load test it. Judging from what you said your bike did, I'd be surprised if they didn't tell you the battery is bad. It sounds like the battery suffered and internal short that basically killed all the power to your bike or at least dropped it down to between two and eight volts. I think this is what is wrong with your bike. I hope this helps. Good Luck, Steve
Posted on May 03, 2010
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Posted on Jan 02, 2017
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Throttle Body Cleaning on vehicles without electronic throttle control (most 2000 and down)
You can in most cases repair this slow speed stall or unstable idle by cleaning the engine throttle valve and the idle speed control valve using a product called CRC Spray Throttle valve cleaner. Spray the cleaner into the air intake of the engine with the hose removed from the throttle body, the engine will try to stall so hold up the idle speed manually. Once you have used up about 1/2 can of the cleaner stall the engine out while spraying and turn the key off, disconnect the negative battery cable for 5 minutes and then reconnect and drive the car for a about 25 miles of varied driving modes. If this doesn't cure the problem you may need the fuel injectors professionally cleaned by the dealer service dept.
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