sportster 883 carb problem
#21
06-17-2009, 01:09 PM
I am kicking around the idea of redoing the intake gaskets again, Ugh, I hate playing with those goofy screw angles!!! 
I did install early on a SE Air Cleaner Kit since I was going into the intake anyway,
I thought the revised breather hose arrangement of the SE might help, just as you mentioned, but I guess not,
Next ride will decide course of action for me, if she farts again, off with the intake,
What I did notice the last ride, she has good low speed takeoff, flattens out in the mid-range, then takes off again in the higher rpm range, this was after the idle mixture was turned out 3/4 more,
I did install early on a SE Air Cleaner Kit since I was going into the intake anyway,
I thought the revised breather hose arrangement of the SE might help, just as you mentioned, but I guess not,
Next ride will decide course of action for me, if she farts again, off with the intake,
What I did notice the last ride, she has good low speed takeoff, flattens out in the mid-range, then takes off again in the higher rpm range, this was after the idle mixture was turned out 3/4 more,
#22
11-28-2009, 10:04 AM
Idle mixture screw location?
does anybody have a picture of the location of the Idle mixture screw?
Thanks
Thanks
Most people call them carb farts, where it coughs or spits when you're pulling away from a stop, if that's what you mean.
If you're talking about sort of a gargling or gagging sound at part throttle, like in second gear at a mid-range speed, that's something else.
The carbs do have a mixture screw; if it hasn't been done already, you'll need to remove the carb from the engine and extract the lead plug that is used to seal the idle mixture screw opening.
Most people say to gently seat the screw, counting the number of turns out it was just so you know where you started, and then start with 2.5 turns out. Be gentle turning that screw in because it has a delicate aluminum seat. I've found that a half turn out from wherever it was from the factory is a pretty good starting place. Then you get the engine good and warm and start turning the screw in 1/8 turn at a time until it starts the carb farting again when you accelerate from a stop, at which point you back it out an 1/8 turn and run it that way a while. A spit once in a while is no biggy. If you try to run with no spits ever, you'll be running too rich.
Carb adjustments need to be done on an engine in good working order, meaning fresh plugs, clean oil, a clean air filter and no intake or exhaust leaks. If you have a stock air filter, they are washable in warm water with a mild detergent.
If you're talking about sort of a gargling or gagging sound at part throttle, like in second gear at a mid-range speed, that's something else.
The carbs do have a mixture screw; if it hasn't been done already, you'll need to remove the carb from the engine and extract the lead plug that is used to seal the idle mixture screw opening.
Most people say to gently seat the screw, counting the number of turns out it was just so you know where you started, and then start with 2.5 turns out. Be gentle turning that screw in because it has a delicate aluminum seat. I've found that a half turn out from wherever it was from the factory is a pretty good starting place. Then you get the engine good and warm and start turning the screw in 1/8 turn at a time until it starts the carb farting again when you accelerate from a stop, at which point you back it out an 1/8 turn and run it that way a while. A spit once in a while is no biggy. If you try to run with no spits ever, you'll be running too rich.
Carb adjustments need to be done on an engine in good working order, meaning fresh plugs, clean oil, a clean air filter and no intake or exhaust leaks. If you have a stock air filter, they are washable in warm water with a mild detergent.
#23
11-29-2009, 07:12 AM
#24
11-29-2009, 01:59 PM
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