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Old 21st September 2019
shaunwerkz shaunwerkz is offline
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Sportster/Buell Model: Sportster 1200
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Default 1996 Sportster 1200 ignition/ idle/ warm up/ lost cylinder???

My 96 sportster 1200 is having an issue I can't track down. Up until a few weeks ago the bike ran relatively well (compared to now at least)

I have replaced the battery, ignition, spark plugs, spark plug wires, ground/ hot cables, regulator, and stator.... I'm lost. Instead of trying to explain it I have taken a video, but essentially the bike will start warm up enough to idle (no choke) then a few minutes in will start with problems: sounds like it's dropping a cylinder, black smoke, dim headlight, no throttle response. Then it will intermittently come back to life and run fine for seconds or minutes and then revert right back to this problem. The only thing I can think of at this point is it's a bad ignition/ cam sensor but I'm tired of throwing money at this thing and getting no results.

https://youtu.be/t-IUGS_WzoM

Any input would be greatly appreciated.

Thanks!
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Old 21st September 2019
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Toejam503 Toejam503 is offline
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Bad coil? If a coil is weak or bad, power drops off as it gets warmed up.
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Old 21st September 2019
smilinbrad smilinbrad is offline
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My 93 1200 did that too. Found a U-tube of some guy and his Buell doing the same thing. Seems the main circuit breaker acts this way when it starts going south. Starts, runs, warms up, starts cutting out. $7.00 at the auto parts store. Don't know if you have the same set up.
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Old 22nd September 2019
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IXL2Relax IXL2Relax is offline
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Sportster/Buell Model: Sportster 883►1200
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Default

When you're having issues with the electrical system, use this Sportsterpedia section about checking the battery cables, voltages and grounds - DO THIS BEFORE ANYTHING ELSE:
http://sportsterpedia.com/doku.php/t...place_to_start

Make sure the ground wires are clean and well connected at the upper REAR motor mount...

I would disconnect the regulator and see if you get the same symtoms - The bike will run fine if the battery is good...


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