| Re: Farting sportster...
any problem at low speed is normally down to the pilot jet or throttle opening position.
altering the main jet will make no difference to the low revs you mention.
My 2002 883R still farts even though I have lowered the opening position of the butterfly valve.
The problem seems to be to balance the amount of petrol that its sent into the carb via the accellerator system against the amount of petrol sent in via the butterfly valve(which controls the amount of lift on the needle) at low revolutions.
people have mentioned adusting the fuel/air mixture, but I think that may affect your petrol intake throughout the full throttle range.
Since I'm getting over 60mpg with my current settings I'm more than happy to put up with the occasional spit-back.
not a very technical answer to your question I'm afraid, but every bike and the way its ridden means there are so many different settings for your own way of riding that it will be almost impossible to give you a definitive answer to cure your problems.
hope this helps
see ya
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