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Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

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  #11  
Old 14th May 2009
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Quote:
Originally Posted by ryder rick View Post
Why do riders feel the need to defend the fact that they have chosen to run an part on their bike that leaves copious amounts of power on the table and causes tuning problems? It's OK that you have made that choice.
Your choice is your choice, there is no need to defend that choice.
At the same time it is NOT good etiquette to try and tell someone that something that is not the best is OK!
What is good for you, may not be good for them.
So you are in fact giving bad advice.
Give the person all the information and let them make their choice.

It's a known and documented fact that open pipes are not the best choice for the street.

I HATE OPEN EXHAUST! As a professed tuner open exhaust makes me look bad, because I can't always tune around it.

Put what ever you want on your bike, if you have problems be prepared to bite the bullet. And whatever you do, don't blame your tuner when you go against advice.
I'm sorry were your comments aimed at me?
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  #12  
Old 15th May 2009
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I run 2.95 and 70 in mine with drags and lollipops on my 78. Regardless of some oppinions it runs top notch with this set up. I am also right on the coast, that will make a differance on the jetting.
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  #13  
Old 15th May 2009
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Hey Supr2nr I've Got A Super E And Drags On Mine, And The Sound Is Awesome, Along With The Smooth Looks. Like You I'm More Of A Cruiser Than A Speed Freak. I've Had Several Compliments On The Looks And Sound, Along With A Few Frowns And Fingers(i'm Sure), From Neighbors (early Morning Wake-up Calls).
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  #14  
Old 15th May 2009
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With drag pipes I would start out with 28/68

A 28 will probably work well but you'll have to find the right main. It's unlikely you'll need less than a 66 or bigger than a 70.

Iron heads aren't as sensitive to drag pipes as Evo's, because the tall piston domes tend to block some of the reversion.

If you're buying a new Super E it will probably have an adjustable air bleed jet. Super E's tend to run rich in the mid range. The air bleed jet allows you to lean out the mid range. A bigger air bleed jet causes the main jet to come on at higher rpm.
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  #15  
Old 15th May 2009
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well this is from 30 yrs ago but i bought a new sporty then a new ss carb . eirther the ss carb or the sporty was going in the trash. i think the stock was a kehehin and it worked perfectly even with the drags
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  #16  
Old 15th May 2009
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71 xlch 900 S&S E (was on the bike when I pushed it out of the farm field in Wisconsin) and drags pipes

28 intermediate 68 main

bike runs superb
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  #17  
Old 15th May 2009
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72 CH with S&S E, 1-3/4" drags with eyebolts, K&N filter in S&S housing, PB plus cams. Sea level.
.0295 intermediate .068 main.
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  #18  
Old 15th May 2009
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Quote:
Originally Posted by biknut View Post
With drag pipes I would start out with 28/68

A 28 will probably work well but you'll have to find the right main. It's unlikely you'll need less than a 66 or bigger than a 70.

Iron heads aren't as sensitive to drag pipes as Evo's, because the tall piston domes tend to block some of the reversion.

If you're buying a new Super E it will probably have an adjustable air bleed jet. Super E's tend to run rich in the mid range. The air bleed jet allows you to lean out the mid range. A bigger air bleed jet causes the main jet to come on at higher rpm.
The 401-060 I don't think comes with an adj air bleed. I will start with 28/68 as you are also in Dallas. This bike I'm building for my Daughter & I don't think she will ride it a lot & it came with drag pipes & she likes the sound as did the other 79 I bought her for a backup it also has an S&S & seems to run ok. My
77 has an S&S & does not have drag pipes (I like it that way).
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  #19  
Old 15th May 2009
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Quote:
Originally Posted by dobermandave View Post
The 401-060 I don't think comes with an adj air bleed. I will start with 28/68 as you are also in Dallas. This bike I'm building for my Daughter & I don't think she will ride it a lot & it came with drag pipes & she likes the sound as did the other 79 I bought her for a backup it also has an S&S & seems to run ok. My
77 has an S&S & does not have drag pipes (I like it that way).
This is how you can tell if it has the adjustable air bleed.

Adjustable Air Bleed for Super E and G Carburetors

The main air bleed passage in S&S Super "E" and "G"
carburetors produced for the 2004 model year and later is fitted
with a replaceable .040" jet in place of the .040" drilled main air
bleed passage. The replaceable jet allows changing the size of
the main air bleed. Carburetors with this modification can be
identified by a serial number that begins with the letter E or
higher. See Picture 47.

These are the online instructions for tuning a Super E

http://www.sscycle.com/admin/uploads...ns/51-1012.pdf
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  #20  
Old 15th May 2009
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dobermandave dobermandave is offline
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Quote:
Originally Posted by biknut View Post
This is how you can tell if it has the adjustable air bleed.

Adjustable Air Bleed for Super E and G Carburetors

The main air bleed passage in S&S Super "E" and "G"
carburetors produced for the 2004 model year and later is fitted
with a replaceable .040" jet in place of the .040" drilled main air
bleed passage. The replaceable jet allows changing the size of
the main air bleed. Carburetors with this modification can be
identified by a serial number that begins with the letter E or
higher. See Picture 47.

These are the online instructions for tuning a Super E

http://www.sscycle.com/admin/uploads...ns/51-1012.pdf
The S&S on my 77 starts with a D, the one on the other 79 starts with an F so it must have the replaceable jet. I guess my new one will also (haven't got it in yet). The guy I talked to at J&P has 3 ironheads & said go 1 up on the main for drag pipes. Just like you did.
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