Question about 1993 Harley Davidson XLH Sportster 883

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I have a 1996 883 Harley Sportster with a S&S carb (E) . When ideling its ok , but as soon as you try to excelerate it cut right out . Could it be the excelerator pump ?

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Suspect items are the float level, accelerator pump, acc. pump inlet and exit check valves, off idle circuit, and main jet circuit. Be certain that you have no intake leaks.

Posted on Oct 03, 2010


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If the engine is missing at idle speed and spitting back out of the carb, it's usually because it's running a bit lean. If the carb is stock and unmodified, there's not a lot you can do at the carb. You may have a vacuum leak at the carb to manifold seal or at one of the intake to head connections. Try changing the spark plugs and if this doesn't help, I'd suggest changing the intake gaskets.

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May 16, 2010 | 1979 Harley Davidson XLH 1000 Sportster

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My Harley Davidson Sportster 1200 cuts out during exceleration it appears to be an electrical problem as the ignition the dial lights also cut out.

The volt reg could be getting over volts,the charging system may need to be tested to determine whats going out.The voltage output from the stator goes up with more rpms,when the voltage regulator gets too much it dumps it into the grounding side of your electrical system(somethimes the ground wire will get smoking hot)This dump of power could also kill the rest of the system.Make sure your carb is clean (remove trash from inside the jet and filter) just to be sure its not just dirty fuel system.

Apr 25, 2010 | 2001 Harley Davidson XL 1200 C Sportster...

1 Answer

If my harley is back firing out the exhaust after de- exceleration, is this burning too rich ??? what should I do??? It now has a 1200 sporty carb on it with 180 main jet with a 42 idle jet. I have mixture...

It may be too rich on decel...but it is more likely an exhaust leak. Do Harleys have mechanical valve lash adjustments? If you do then I would also recommend checking the clearances on the exhaust valves.

Good luck and be careful.

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