New Pipes Install Question
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Cruiser
Joined: Jul 2011
Posts: 185
Likes: 0
From: Greenville SC
New Pipes Install Question
I bought some drag pipes for my 1200s, and I have already purchased the crush gaskets. I have a Screaming Eagle air cleaner already.
My question is, will I need to do anything else such as replace the jets, tune etc...?
Or can I just take off the old, and slap on the new?
Thanks in advance.
My question is, will I need to do anything else such as replace the jets, tune etc...?
Or can I just take off the old, and slap on the new?
Thanks in advance.
Road Master
Joined: Jul 2010
Posts: 1,051
Likes: 7
You will need to do something, that is likely. Drag pipes seem to generally have a negative affect on Sportster performance, as they are designed truly for performance at full throttle only. You might wind up putting "lollipops" in them to provide a little backpressure (google "exhaust lollipop"), so your mid-throttle performance doesn't suck.
You'll probably wind up re-jetting as well, though I wouldn't be the one to tell you exactly what to do in this case. My bikes are all EFI, but we see questions like yours all the time here about carb'd bikes. If your bike was EFI you'd have to download a new map after making these changes, which in some ways is the equivalent of rejetting a carb'd bike.
You'll probably wind up re-jetting as well, though I wouldn't be the one to tell you exactly what to do in this case. My bikes are all EFI, but we see questions like yours all the time here about carb'd bikes. If your bike was EFI you'd have to download a new map after making these changes, which in some ways is the equivalent of rejetting a carb'd bike.
Ultimate HDF Member
Joined: Jul 2006
Posts: 6,478
Likes: 12
From: Nashville, TN
I suspect you will need to re-jet and tune the carb, if it wasn't re-jetted when the SE air cleaner was added.
Here are a couple of great articles that will help guide you:
http://www.harley-performance.com/ha...arburetor.html
http://www.harley-performance.com/ha...r-jetting.html
Here are a couple of great articles that will help guide you:
http://www.harley-performance.com/ha...arburetor.html
http://www.harley-performance.com/ha...r-jetting.html
Advanced
Joined: Feb 2012
Posts: 75
Likes: 1
From: nor cal
the re jetting is not hard at all.me and a friend did it in an hour or so.and never opened a carb ever before.the instructions are very easy to understand,and step by step.buy the kit from the above mentioned link and you will have no problems.
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