Jet Help!!!!
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Intermediate
Joined: Jun 2010
Posts: 28
Likes: 0
From: NH
Jet Help!!!!
I just had a shop install a stock CV carb back on my 03 Heritage as well as a screaming eagle air kit. I am running v&H Bigshots pipes. I got it back and it runs terrible. Getting a coughing sound out of the air cleaner at all speeds. Sounds like it is starving for fuel. What jet sizes should be in the carb on a Stage 1 setup?
Your help is appreciated.
Your help is appreciated.
Outstanding HDF Member
Joined: May 2008
Posts: 2,160
Likes: 3
From: Houston, Texas
..... So you paid someone to install the carb and high flow A/C... and it doesn't run right?
I would take it back and have them make it right....
If that is not an option...
Has the Carb ever had a carb kit installed?
if not buy a S/E or Dynojet Kit as you are going to have to do a little more than just replace a jet...
CC
I would take it back and have them make it right....
If that is not an option...
Has the Carb ever had a carb kit installed?
if not buy a S/E or Dynojet Kit as you are going to have to do a little more than just replace a jet...
CC
Ultimate HDF Member
Joined: Oct 2007
Posts: 5,257
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From: Leander Texas
Banned
Joined: Sep 2009
Posts: 3,569
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From: deland,florida
we dont like the "kits" either,we usually go 48-52 int jet & 180-190 on main jet,if your shop couldnt get this right,dont know if ide bring it back,justy giving them a chance to screw up something else,putting on a A/C & rejetting aint rocket science!!
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Intermediate
Joined: Jun 2010
Posts: 28
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From: NH
I called him at his house this morning, he said there is a 190 and a 45 for jets in there. I pulled the plugs and they are more white than dark. I don't believe he touched the needle at all. What are people using for needles? Are the stock needles adjustable?
The jet sizes seem to be pretty close to correct.
The jet sizes seem to be pretty close to correct.
Novice
Joined: Jul 2010
Posts: 20
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Go to www.harleyperformance.com and click on carb tuning. Very helpful to me. I just did the whole changing air cleaner and exhaust thing. Hope this helps. But I'd be pissed if I paid to get work done and it wasn't done right. That's why I do things myself.
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Outstanding HDF Member
Joined: May 2008
Posts: 2,160
Likes: 3
From: Houston, Texas
I called him at his house this morning, he said there is a 190 and a 45 for jets in there. I pulled the plugs and they are more white than dark. I don't believe he touched the needle at all. What are people using for needles? Are the stock needles adjustable?
The jet sizes seem to be pretty close to correct.
The jet sizes seem to be pretty close to correct.
I'm used to talking to guys that know very little about bikes...
I'm not a fan of the kits either...but for someone who knows very little..they can get them close...
CC
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Ultimate HDF Member
Joined: Oct 2007
Posts: 5,257
Likes: 6
From: Leander Texas
stock needles are adjustable. you can get thin washers at the hardware store
http://www.mummbrothers.com/SRF_Stuf...e/Air_Fuel.htm
http://www.jetsrus.com/main_page.htm
http://www.jetsrus.com/FAQ_rejetting.htm
http://www.sportster.org/tech/carb/rejetting.shtml
http://www.hdtalking.com/fuel_and_ca..._shooting.html
this is all i have
http://www.mummbrothers.com/SRF_Stuf...e/Air_Fuel.htm
http://www.jetsrus.com/main_page.htm
http://www.jetsrus.com/FAQ_rejetting.htm
http://www.sportster.org/tech/carb/rejetting.shtml
http://www.hdtalking.com/fuel_and_ca..._shooting.html
this is all i have
Road Master
Joined: Apr 2009
Posts: 1,123
Likes: 43
From: NJ
If it's truely running bad at all speeds then it's not going to be a needle issue since they only come into play during the mid-range, same goes for your highspeed jet. Likewise, the slow jet won't have any bearing in the upper bands.
How do you know the carb was stock to begin with and why did you put it on? Was there an issue with the existing carb?
Have you checked for air leaks on the manifold and VOES? An air leak can cause a lean condition at all speeds and barf back through the carb.
Have you tried to re-adjust the mixture, should not matter much at hi speeds but a good easy place to try.
45 & 190 should run OK on a stag one, maybe go to an aftermarket 46 or a 48 but adjusting the mixture will tell you that. The 190 should be plenty.
Carbs are funny sometimes, try to isolate the issue befor just tearing into them. My personal bike started breaking up under high throttle settings, soon after I changed the float needle. I figured it was some sort of dirt in the high speed circuit and it turned out to be a flying insect. Must have landed in the bowl area while I was working on it and I sealed him in when I reassembled. It was partially blocking the high speed jet..LOL
Read through the nightrider site, ton of great info..\
http://www.nightrider.com/biketech/hd_cv_mods.htm
D
How do you know the carb was stock to begin with and why did you put it on? Was there an issue with the existing carb?
Have you checked for air leaks on the manifold and VOES? An air leak can cause a lean condition at all speeds and barf back through the carb.
Have you tried to re-adjust the mixture, should not matter much at hi speeds but a good easy place to try.
45 & 190 should run OK on a stag one, maybe go to an aftermarket 46 or a 48 but adjusting the mixture will tell you that. The 190 should be plenty.
Carbs are funny sometimes, try to isolate the issue befor just tearing into them. My personal bike started breaking up under high throttle settings, soon after I changed the float needle. I figured it was some sort of dirt in the high speed circuit and it turned out to be a flying insect. Must have landed in the bowl area while I was working on it and I sealed him in when I reassembled. It was partially blocking the high speed jet..LOL
Read through the nightrider site, ton of great info..\
http://www.nightrider.com/biketech/hd_cv_mods.htm
D