Sportster cough!!
#1
Sportster cough!!
I'm a newbe to Harley's, and I just bought an 05 XL. It coughs at take off. It does this even after I've been riding for a while. When I run with the choke out a little bit, it'll stop coughing. It also seems to run better this way. Could it be that the choke needs adjusting? Oh yea, by the way I've also been told that by running with the choke out it will foul my plugs. Is that true or is it a myth? Should I just take it to the dealer to check her out for me? Any input on this matter would be greatly appreciated...
#2
#4
I'm a newbe to Harley's, and I just bought an 05 XL. It coughs at take off. It does this even after I've been riding for a while. When I run with the choke out a little bit, it'll stop coughing. It also seems to run better this way. Could it be that the choke needs adjusting? Oh yea, by the way I've also been told that by running with the choke out it will foul my plugs. Is that true or is it a myth? Should I just take it to the dealer to check her out for me? Any input on this matter would be greatly appreciated...
#6
It's running lean that's what causes bikes to cough back through the carb, that also explains why it runs better with the enrichener out a little. All stock Harleys do it to some extent.
The real fix is to get the plug off the idle mixture screw so the carb can be adjusted or you may also need one step larger idle jet.
The real fix is to get the plug off the idle mixture screw so the carb can be adjusted or you may also need one step larger idle jet.
#7
The way to correct the carb cough or as some people call them carb farts, is to rejet the slow jet. The stock slow jet is a #42. You can try a #45 and if the bike has pipes and upgraded air cleaner, than go with a #48. I run a 48 in my 01 1200C. it has SE II slip ons with big city thunder baffles, 180 main jet, 48 slow jet and a hypercharger. No carb farts at all. Good luck
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#8
It's running lean that's what causes bikes to cough back through the carb, that also explains why it runs better with the enrichener out a little. All stock Harleys do it to some extent.
The real fix is to get the plug off the idle mixture screw so the carb can be adjusted or you may also need one step larger idle jet.
The real fix is to get the plug off the idle mixture screw so the carb can be adjusted or you may also need one step larger idle jet.
Originally Posted by moriena72
The way to correct the carb cough or as some people call them carb farts, is to rejet the slow jet. The stock slow jet is a #42. You can try a #45 and if the bike has pipes and upgraded air cleaner, than go with a #48. I run a 48 in my 01 1200C. it has SE II slip ons with big city thunder baffles, 180 main jet, 48 slow jet and a hypercharger. No carb farts at all. Good luck
#9
My 2006 does that a bit. I'm running some Sea Foam through my tank of gas thinking maybe the pilot jet is a little dirty.Mine used to do it a little only when cold and just off idle. It's got a bit worse I noticed just recently.
The dealership I work at, the techs often go to a 180 main jet, 45 slow jet, and go to a "California" needle. I'd rather leave me jets alone, so I'm going to try the Sea Foam. My bike starts well, and runs fine otherwise, and I got it used with 3000 miles, but I think it's all stock.
jon
The dealership I work at, the techs often go to a 180 main jet, 45 slow jet, and go to a "California" needle. I'd rather leave me jets alone, so I'm going to try the Sea Foam. My bike starts well, and runs fine otherwise, and I got it used with 3000 miles, but I think it's all stock.
jon
#10
A Dynojet or Thunderslide jetting kit helps a lot with the cough. The stock needle is not adjustable so the kits generally come with an adjustable needle as well as other jets to get it tuned right. Pulling the idle screw plug so you can adjust the idle mixture is a free way of getting some adjustment if you do nothing else.