The Sportster and Buell Motorcycle Forum - The XLFORUM®
 

Go Back   The Sportster and Buell Motorcycle Forum - The XLFORUM® > SPORTSTER MOTORCYCLE FORUM > Sportster Motorcycle Era Specific and Model Specific > Ironhead Sportster Motorcycle Talk (1957-1985)
XLF Blogs XLF Arcade XLF Disclaimer/Privacy Statement/Terms Of Use

Notices

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

Active Threads
0 Anyone go racing last weekend?
Last Post: madnss
Posted On: 8 Minutes Ago
Replies: 3,234
Views: 333,053
0 Generator light q
Last Post: IXL2Relax
Posted On: 11 Minutes Ago
Replies: 2
Views: 69
0 S&S Super E Carb
Last Post: jp2code
Posted On: 22 Minutes Ago
Replies: 18
Views: 386
0 Xl???
Last Post: 1200CustomHD
Posted On: 32 Minutes Ago
Replies: 3
Views: 52
0 New to me 55kh
Last Post: thecarfarmer
Posted On: 36 Minutes Ago
Replies: 19
Views: 538
0 Keep & Kill
Last Post: Crusty
Posted On: 38 Minutes Ago
Replies: 18,121
Views: 1,069,784
0 Piston Question '82 Ironhead 1000 Electric Start
Last Post: BigMek
Posted On: 1 Hour Ago
Replies: 9
Views: 281
0 KT - 2020 - Where Eagles Dare
Last Post: IXL2Relax
Posted On: 1 Hour Ago
Replies: 62
Views: 14,265
0 Exhaust differences from 98 to 99
Last Post: IXL2Relax
Posted On: 1 Hour Ago
Replies: 5
Views: 140
0 Need Tuning Advice 1275 Kit 560 Cams
Last Post: XL1275
Posted On: 1 Hour Ago
Replies: 5
Views: 102
0 Whats the Ironhead TOP SPEED?
Last Post: Nitro57xl
Posted On: 1 Hour Ago
Replies: 148
Views: 18,654
0 82 E84 L84-85 charging systems?
Last Post: SHAKY DAVE
Posted On: 2 Hours Ago
Replies: 10
Views: 278
0 so it's officially ended
Last Post: IXL2Relax
Posted On: 2 Hours Ago
Replies: 32
Views: 916
0 Hot Chicks on Hot Bikes
Last Post: trainman
Posted On: 2 Hours Ago
Replies: 11,082
Views: 2,181,223
3 Wtb, Wts, Wtt, Wtg (Ironhead)
Last Post: soundnav
Posted On: 2 Hours Ago
Replies: 44
Views: 264,488
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: trainman
Posted On: 2 Hours Ago
Replies: 48,404
Views: 7,813,138
0 is a buell a harley
Last Post: Steve9
Posted On: 3 Hours Ago
Replies: 173
Views: 25,627
0 Clutch squeal ? Bad throwout bearing ?
Last Post: boomerguy
Posted On: 4 Hours Ago
Replies: 90
Views: 14,806
0 Hottie of the day, no nudity.
Last Post: Stairman
Posted On: 4 Hours Ago
Replies: 22,229
Views: 2,273,695
0 Nup 1009 (Bearing)
Last Post: rocketmangb
Posted On: 4 Hours Ago
Replies: 5
Views: 157
0 The Sport(ster)ing Life
Last Post: sportsterpaul
Posted On: 4 Hours Ago
Replies: 6
Views: 164
0 Snippets
Last Post: sportsterpaul
Posted On: 5 Hours Ago
Replies: 242
Views: 24,917
0 Food porn
Last Post: sportsterpaul
Posted On: 5 Hours Ago
Replies: 2,094
Views: 413,635
0 79-85 Breather Vent Mod - Adding a Secondary Vent Hose at 6:00 Position
Last Post: Ferrous Head
Posted On: 7 Hours Ago
Replies: 54
Views: 1,737
0 $10 for an oil change VR1 20W50 conventional
Last Post: 60Gunner
Posted On: 8 Hours Ago
Replies: 0
Views: 60
0 Show your favorite pic of your bike. just one
Last Post: Skeezix
Posted On: 10 Hours Ago
Replies: 4,794
Views: 1,880,386
0 Round Air Cleaner Poll
Last Post: Joe_jeep
Posted On: 10 Hours Ago
Replies: 348
Views: 75,730
0 Generator conversion kit question
Last Post: 77IRHD
Posted On: 12 Hours Ago
Replies: 2
Views: 120
0 Finnish custom rider
Last Post: FinnDRZ
Posted On: 14 Hours Ago
Replies: 17
Views: 651
0 AGM battery for 76' XLH
Last Post: JonesL
Posted On: 23 Hours Ago
Replies: 10
Views: 404
More...
Members Birthdays
Reply
 
Share Thread Tools Display Modes
  #11  
Old 17th September 2019
Nitro57xl Nitro57xl is offline
Know It All
 
Join Date: Nov 2018
Posts: 163
Reputation: 9524
Nitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of light
Default

On an original jet the tube has a slight outside taper on the bottom, it is pinched for the metering part of the tube about 3/8" up from the bottom. The tube is drilled from the bottom and gas flows through the tube. No sideholes like the later jets you have pictured.
Reply With Quote
  #12  
Old 17th September 2019
RKN's Avatar
RKN RKN is offline
Flat Track Champion
 
Join Date: May 2010
Location: Russia
Posts: 688
Sportster/Buell Model: 883 (90")
Sportster/Buell Year: 2004
Sportster/Buell Model #2: 3 3/8" x 5"
Sportster/Buell Year #2: 1974
Other Motorcycle Model: 900 CH engine in H frame
Other Motorcycle Year: 196?
Reputation: 49525
RKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to behold
Default

OK, I had to search through ABCgang listings (thanks, Monte03!) and found a pic:




So the intermediate jet is drilled throught from top to bottom and there are no more holes in it? And the hole diameter should be .029" if I want to make an .029 jet? What is the purpose of a pinch? Is located on the same level as intermediate passage plug (#11 from the S&S catalog)?
Reply With Quote
  #13  
Old 17th September 2019
Nitro57xl Nitro57xl is offline
Know It All
 
Join Date: Nov 2018
Posts: 163
Reputation: 9524
Nitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of light
Default

No more holes. The purpose of the pinch is to provide material to drill out for the metering orifice and should end up above the passage level because the passage provides the gas for the jet. The small marks on the side were a crude way of telling what size the jet was?. It should be pointed out that these carbs were more or less homemade as S&S was a small company then and nobody knew how these would sell or how big the market would become? This was really the first aftermarket carb made especially for a Harley. Any others were adapted from cars Like the SU or weber?
Reply With Quote
  #14  
Old 17th September 2019
RKN's Avatar
RKN RKN is offline
Flat Track Champion
 
Join Date: May 2010
Location: Russia
Posts: 688
Sportster/Buell Model: 883 (90")
Sportster/Buell Year: 2004
Sportster/Buell Model #2: 3 3/8" x 5"
Sportster/Buell Year #2: 1974
Other Motorcycle Model: 900 CH engine in H frame
Other Motorcycle Year: 196?
Reputation: 49525
RKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to behold
Default

Quote:
Originally Posted by Nitro57xl View Post
No more holes. The purpose of the pinch is to provide material to drill out for the metering orifice and should end up above the passage level because the passage provides the gas for the jet. The small marks on the side were a crude way of telling what size the jet was?. It should be pointed out that these carbs were more or less homemade as S&S was a small company then and nobody knew how these would sell or how big the market would become? This was really the first aftermarket carb made especially for a Harley. Any others were adapted from cars Like the SU or weber?
Thank you!
Took a closer look at it. The thread size for the intermediate jet and plug is 1/4-20. The thread size for the intermediate air bleed is 5/16-24. That means that a main jet for S&S Super E/G could be used instead of the intermediate air bleed, since they got the same thread size and modern mains are also available in .058 or .060 size.

That's all for the good news, now a not so good one for me - the GAL float bowl screw pattern is not the same as GB - the top right hole on GB is offset to the left, so it won't interfere with the intermediate jet hole.

Guess this is going to be a long project - I don't want to drill the carb body or the float bowl, so hopefully I will be able to fish out the correct bowl from ebay over time. Catalog says there're two types of bowls - a gas one and a fuel one. Is there any way to identify them?
Reply With Quote
  #15  
Old 17th September 2019
Nitro57xl Nitro57xl is offline
Know It All
 
Join Date: Nov 2018
Posts: 163
Reputation: 9524
Nitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of lightNitro57xl is a glorious beacon of light
Default

The fuel float bowl has a much bigger thread for the huge needle & seat required to run nitro! Otherwise the float bowls were the same. Yes, you could run a super e main jet for an air bleed! A fabricator could make a float bowl? Not like brain surgery? Floats are impossible to find for these carbs. S&S bought floats from a car carburetor company and used levers from a model m linkert soldered on. Nobody knows for sure which carbs used those floats? Some think 6 cylinder Ford from the 60's?
Reply With Quote
  #16  
Old 17th September 2019
RKN's Avatar
RKN RKN is offline
Flat Track Champion
 
Join Date: May 2010
Location: Russia
Posts: 688
Sportster/Buell Model: 883 (90")
Sportster/Buell Year: 2004
Sportster/Buell Model #2: 3 3/8" x 5"
Sportster/Buell Year #2: 1974
Other Motorcycle Model: 900 CH engine in H frame
Other Motorcycle Year: 196?
Reputation: 49525
RKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to behold
Default

Quote:
Originally Posted by Nitro57xl View Post
The fuel float bowl has a much bigger thread for the huge needle & seat required to run nitro! Otherwise the float bowls were the same. Yes, you could run a super e main jet for an air bleed! A fabricator could make a float bowl? Not like brain surgery? Floats are impossible to find for these carbs. S&S bought floats from a car carburetor company and used levers from a model m linkert soldered on. Nobody knows for sure which carbs used those floats? Some think 6 cylinder Ford from the 60's?
Well, on the other hand I could try to make a spacer, use a countersunk screw to mount it to the top right carb body hole, use 3 longer bolts and drill and tap the spacer for the 4th hole. Now wait, when I bought my GAL 2 years ago it did come with about 1/4" thick spacer. I'll have to take a closer look at it.
Reply With Quote
  #17  
Old 18th September 2019
Monte03's Avatar
Monte03 Monte03 is offline
Senior Master Custom Bike Builder
 
Join Date: Mar 2008
Posts: 4,798
Sportster/Buell Model: XLCH
Sportster/Buell Year: 1969
Sportster/Buell Model #2: 1966 XLCH
Other Motorcycle Model: BMW Twin
Other Motorcycle Year: 82
Reputation: 87881
Monte03 has much to be proud ofMonte03 has much to be proud ofMonte03 has much to be proud ofMonte03 has much to be proud ofMonte03 has much to be proud ofMonte03 has much to be proud ofMonte03 has much to be proud ofMonte03 has much to be proud ofMonte03 has much to be proud ofMonte03 has much to be proud ofMonte03 has much to be proud of
Default

great Info NITRO, I Cannot Post Pictures but it was the Great Leo Payne that Assisted George Smith Senior to Develope those First Gen G, GB, F carbs, they used a Sidebowl Linkert as their Test Bed Guinnea Pig Carb.. all Great Stuff 'And I Love These Carbs, Also have a GBL on my 69 XLCH, it just works great
__________________
Cycle World Oct 1962:
'The Sportster XLCH is not every Man's cup of tea - and we don't think it was intended as such'
Reply With Quote
  #18  
Old 18th September 2019
Hippysmack's Avatar
Hippysmack Hippysmack is offline
XL FORUM TEAM MEMBER
 
Join Date: Jul 2014
Posts: 6,419
Sportster/Buell Model: Xl1250S
Sportster/Buell Year: 98
Other Motorcycle Model: Kawasaki Vulcan 500
Other Motorcycle Year: 95
Reputation: 6459282
Hippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond repute
Default

This may not help much but I've been gathering info on the Early S&S carbs in the Sportsterpedia REf section.
I've brought Dr Dicks history information here plus some pics.
http://sportsterpedia.com/doku.php/techtalk:ref:carb01v
__________________
Reference the XLFORUM'S Sportsterpedia for additional technical information & advice

In Search of Fuel, Sunshine and a Steady Idle.
Reply With Quote
  #19  
Old 18th September 2019
needspeed needspeed is offline
XL FORUM LIFE MEMBER
 
Join Date: May 2014
Posts: 1,240
Sportster/Buell Model: xlh
Sportster/Buell Year: 1974
Reputation: 824308
needspeed has a reputation beyond reputeneedspeed has a reputation beyond reputeneedspeed has a reputation beyond reputeneedspeed has a reputation beyond reputeneedspeed has a reputation beyond reputeneedspeed has a reputation beyond reputeneedspeed has a reputation beyond reputeneedspeed has a reputation beyond reputeneedspeed has a reputation beyond reputeneedspeed has a reputation beyond reputeneedspeed has a reputation beyond repute
Default

Some dimensions on the intermediate jet. Overall length is 2.520". Length of the 1/4-20 set screw part is .475". When screwed all the way into the carb the top of the jet is .720" down from the top of the hole. I noticed that the little screw that plugs the cross drilled hole needs to be short enough that it doesn't block the vertical hole that the intermediate jet is in.

The ID of the brass tube used to make the jet is too big and that is why it's pinched down so that a smaller hole can be drilled into it.

But I can't think of any reason that the metering hole couldn't be drilled in the set screw end, using a larger drill through most of it and then finishing with the small drill through the last small distance. The later carbs have the small holes near the top of the tube and it works for them.

If you can't find any 1/8 brass tube you could cut up one of the later jets you have. Finding a 1/4-20 socket head set screw in brass would make drilling and soldering easier too.
Reply With Quote
  #20  
Old 18th September 2019
RKN's Avatar
RKN RKN is offline
Flat Track Champion
 
Join Date: May 2010
Location: Russia
Posts: 688
Sportster/Buell Model: 883 (90")
Sportster/Buell Year: 2004
Sportster/Buell Model #2: 3 3/8" x 5"
Sportster/Buell Year #2: 1974
Other Motorcycle Model: 900 CH engine in H frame
Other Motorcycle Year: 196?
Reputation: 49525
RKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to beholdRKN is a splendid one to behold
Default

Thanks a lot, needspeed!
Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT +1. The time now is 04:58.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
XL Forum® - Linson Media LLC