Hello all. New here. I been riding for few years now but recently purchased my first HD. It ran fine the first few months but now i am having issues. I have done alot of research and seems to be the same problems most sporties have with replacing the crankcase position sensor. But i dont think my scoot has one. She is a 99 sportster 883. Open drag pipes everything else stock.

Starts and idles fine. Once she get five miles or so down the road( full operating temp) she hicccups and chugs like it only hittin on one cyclinder. Mainly does this when taking off from stop lights. Embarassing to say the least. Once i am on the highway and RMPs lil higher than take off she does fine. So basicly does it on take off and when i shift up and low RPMs. Interstate and highway speeds runs like a dream. Any help or ideas would be great. Also with it being a 99 i dont believe i have comp diag on the speedo. But plz correct me if i am wrong. Thanx in advance........

 

Check to make sure your accelerator pump is working. If that is fine, turn your mixture screw out 1/8th of a turn.

 

I can here the pump whine when i turn key before start up so assume it is working properly.

 

+1 on turn your mixture screw out an 1/8th of a turn on your carb. Should improve, ride it and if symptoms improve but not totally go another 1/8 and you should be set

 

I know were the idle screw is. Were would the mixture screw be in relationship to that?

 

I think you hear the speedometer.

 

Yes gues that possible. So how would i check the accelerator pump (fuel pump)

 

Thats the idle mixture screw. Give it a 1/8th turn out.

 

Take of air cleaner, twist throttle and look for spray of gas in carb.

 

Underside of carb near intake. You can get to it if the plug blocking the access hole is pulled.