Carb Adjustment?
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5th Gear
Joined: Jun 2012
Posts: 9
Likes: 0
From: Lawton, OK
Carb Adjustment?
Okay so im new to posting as well as owning a HD Sporty. Im slightly mechanically inclined so I knew I could take on this project myself
I was experiencing carb farts on my Sporty, so I decided to check the plugs since it was beconing hard to start even after sitting for 15 to 20 mins. Found out one of my plugs was burnt because it was running rich, so I replaced them. So I decided to take on the task of adjusting the Carb. I set the screw all the way in, the backed it out 2 and a half. Went to start and it ran for 10 seconds the quit. So I backed it out another half turn and it started, coughed once then continued to run. I drove it around and experienced no farts since. Is there anything else I should look at doing? Or was this all that was needed?
I was experiencing carb farts on my Sporty, so I decided to check the plugs since it was beconing hard to start even after sitting for 15 to 20 mins. Found out one of my plugs was burnt because it was running rich, so I replaced them. So I decided to take on the task of adjusting the Carb. I set the screw all the way in, the backed it out 2 and a half. Went to start and it ran for 10 seconds the quit. So I backed it out another half turn and it started, coughed once then continued to run. I drove it around and experienced no farts since. Is there anything else I should look at doing? Or was this all that was needed?
Stellar HDF Member
Joined: Oct 2010
Posts: 2,601
Likes: 189
From: east texas
first of all the plug would be fouled (black) if rich , not burnt,,thats lean..
second part, is if it takes three turns out to run , it is still lean.
install one step bigger pilot jet , then while running back out airscrew until it bogs down, if it doesnt put in one more step richer pilot.
when you get it too lean ( rough running when turning in airscrew, and rich when turning out (bogging), then find the middle spot , and turn it i/2 turn richer (out ) .
you should be about 1- 1/2, to 2 turns out at that point
Now if you have a modified A/C , or pipes , run wide open in 2/3 gear, shut engine off , and look at plugs , snow white =too smallmain , black -sooty too large main.
you are looking for light tan ...
hope this helps ya
second part, is if it takes three turns out to run , it is still lean.
install one step bigger pilot jet , then while running back out airscrew until it bogs down, if it doesnt put in one more step richer pilot.
when you get it too lean ( rough running when turning in airscrew, and rich when turning out (bogging), then find the middle spot , and turn it i/2 turn richer (out ) .
you should be about 1- 1/2, to 2 turns out at that point
Now if you have a modified A/C , or pipes , run wide open in 2/3 gear, shut engine off , and look at plugs , snow white =too smallmain , black -sooty too large main.
you are looking for light tan ...
hope this helps ya
Ultimate HDF Member
Joined: Jul 2006
Posts: 6,478
Likes: 12
From: Nashville, TN
Some info about the bike would be helpful. Stock exhaust and air cleaner or stage 1?
Regardless, there is great info at these 2 URL addresses:
http://www.harley-performance.com/ha...arburetor.html
http://www.harley-performance.com/ha...r-jetting.html
Regardless, there is great info at these 2 URL addresses:
http://www.harley-performance.com/ha...arburetor.html
http://www.harley-performance.com/ha...r-jetting.html
Thread Starter
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5th Gear
Joined: Jun 2012
Posts: 9
Likes: 0
From: Lawton, OK
Thanks for the info guys. I adjusted the screw 3 1/4 out and its running smoothly now. Took it highway cruising and had no problems whatsoever. I checked the plugs afterward and they are clean, no soot and no burning. Oh and I have the Stage 1 A/C kit and upgraded exhaust.
Road Captain
Joined: Jun 2010
Posts: 568
Likes: 1
From: New Jersey Somerset
Thanks for the info guys. I adjusted the screw 3 1/4 out and its running smoothly now. Took it highway cruising and had no problems whatsoever. I checked the plugs afterward and they are clean, no soot and no burning. Oh and I have the Stage 1 A/C kit and upgraded exhaust.
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