Question about 2000 Harley Davidson FXST Softail Standard

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2000 harley davidson softail standard,pops,and sputters on acceleration,and also when idling when you rev it up it takes a while for it to come back down to idling. it started shortly after i changed the choke cable, but there seems to be no ajustment on the cable, it just screwed into the carbeurator. i have cleaned the carbeurator and checked the seal to the intake manifold. they look good. i have checked the plugs and changed the air filter. i have checked the throttle cable response and it is good. i have even checked to make sure none of the fuel lines are clogged. please help i can't figure this out.

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I'd be willing to bet that you removed the carb to replace the choke cable as it's very difficult to replace with the carb in place. Now, did you replace the seal that the carb "plugs" into? I've seen this happen many times. I never take a carb off an Evo or later model engine with the spigot mount carb without replacing that seal.

The only thing that you didn't mention was the response of the slide in the carb. With the air filter off but the backing plate still on the carb, rev the engine and make sure the slide is going up and down. If not, you've probably got a hole in the diaghragm.

More than likely, you've got a vacuum leak at that carb seal. When you put the air filter backing plate back on the engine, you should not have to move the carb up, down, or sideways to get the three screws started in it. If you do, you need to replace the seals on the manifold at the heads and realign the intake.

If you determine that you need to do this, replace the intake seals at the head but leave the manifold bolts loose. Replace the carb into the manifold, and install the air filter backing plate. Once it's all installed and aligned correctly, tighten the two bolts on each runner of the intake at the heads.

I hope this helps, Good Luck

Posted on Mar 04, 2010

Testimonial: "yes, it was the seal between the carb and the intake, it was not exactly lined up. once i bought a new one and butted it up good no more popping..than"

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