The Sportster and Buell Motorcycle Forum - The XLFORUMģ
 

Go Back   The Sportster and Buell Motorcycle Forum - The XLFORUMģ > SPORTSTER MOTORCYCLE FORUM > Sportster Motorcycle Intake and Exhaust > Sportster Motorcycle Air intake, Carburetor, EFI, Fuel, and Exhaust
XLF Blogs XLF Arcade XLF Disclaimer/Privacy Statement/Terms Of Use

Notices

Sportster Motorcycle Air intake, Carburetor, EFI, Fuel, and Exhaust Problems, advice and/or how tos for Sporster and Buell motorcycle carburators, Electronic Fuel Injection (EFI), Air Intake, Fuel and Exhaust.

Active Threads
0 Keep & Kill
Last Post: Graywolf
Posted On: 15 Minutes Ago
Replies: 33,596
Views: 2,049,689
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: Graywolf
Posted On: 17 Minutes Ago
Replies: 56,870
Views: 9,885,436
0 Hottie of the day, no nudity.
Last Post: Stairman
Posted On: 18 Minutes Ago
Replies: 41,711
Views: 5,817,469
0 Roads I'd like to ride.
Last Post: Stairman
Posted On: 43 Minutes Ago
Replies: 4,030
Views: 539,304
4 The dreaded carb cough and interesting findings
Last Post: gearbanger
Posted On: 1 Hour Ago
Replies: 24
Views: 1,106
0 This is gonna hurt.
Last Post: Graywolf
Posted On: 1 Hour Ago
Replies: 10,177
Views: 2,570,615
0 Left Sidecover Won't Fit
Last Post: cookiemech
Posted On: 3 Hours Ago
Replies: 19
Views: 869
0 1977 sporty
Last Post: sungod
Posted On: 3 Hours Ago
Replies: 9
Views: 263
0 What did you do to your EFI Sporty today?
Last Post: SaddleBronc
Posted On: 4 Hours Ago
Replies: 4,071
Views: 908,581
0 video & pics
Last Post: Crusty
Posted On: 4 Hours Ago
Replies: 2,480
Views: 276,636
0 What did you do for your sporty Today?
Last Post: Melnic
Posted On: 5 Hours Ago
Replies: 8,102
Views: 1,581,994
0 1974 XLH Rebuild
Last Post: Gearhead88
Posted On: 6 Hours Ago
Replies: 63
Views: 2,697
0 A matter of degree (Pretty Pics)
Last Post: IronheadLiam
Posted On: 6 Hours Ago
Replies: 8
Views: 1,528
5 Stock 1982 XLS Gas Tank Mounts
Last Post: IronMick
Posted On: 7 Hours Ago
Replies: 1
Views: 92
0 Vm38 o ring
Last Post: joe s
Posted On: 7 Hours Ago
Replies: 3
Views: 109
0 Brake Lever
Last Post: joe s
Posted On: 7 Hours Ago
Replies: 1
Views: 119
0 oil line routing-a thought
Last Post: Todd007
Posted On: 8 Hours Ago
Replies: 14
Views: 9,223
0 Iree's late night cafe
Last Post: ~Grind~
Posted On: 8 Hours Ago
Replies: 2,471
Views: 515,661
0 TC88A and higher compression timing
Last Post: Tomcatt
Posted On: 8 Hours Ago
Replies: 8
Views: 275
0 an interesting vintage XLCH review...
Last Post: rejeanprimeau
Posted On: 11 Hours Ago
Replies: 28
Views: 940
0 75 Ironhead cafe racer reboot
Last Post: brucstoudt
Posted On: 12 Hours Ago
Replies: 92
Views: 5,371
0 Mushrooms...Hate or Love poll
Last Post: cal43
Posted On: 12 Hours Ago
Replies: 227
Views: 18,078
0 Hot Chicks on Hot Bikes
Last Post: cal43
Posted On: 13 Hours Ago
Replies: 13,722
Views: 3,732,948
0 Hot Rods, Rat Rods, and Customs.
Last Post: cal43
Posted On: 13 Hours Ago
Replies: 5,749
Views: 1,434,187
0 Horseshoe Oil tanks repo China?
Last Post: Ferrous Head
Posted On: 18 Hours Ago
Replies: 20
Views: 2,525
0 Snippets
Last Post: sportsterpaul
Posted On: 20 Hours Ago
Replies: 887
Views: 153,401
0 1959 xlh
Last Post: thomastoth
Posted On: 21 Hours Ago
Replies: 11
Views: 1,455
0 Tank Art
Last Post: joe s
Posted On: 22 Hours Ago
Replies: 43
Views: 2,944
0 Lost for words.
Last Post: Ferrous Head
Posted On: 22 Hours Ago
Replies: 13
Views: 894
0 DO NOT use GMAIL.COM email for XLFORUM.NET
Last Post: Ferrous Head
Posted On: 22 Hours Ago
Replies: 3
Views: 333
More...
Members Birthdays
Jon2R, Pink (68), blackcloud (61), harleyguy2064 (58), JamieBee (49), csmith836 (47)
 
 
Share Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #1  
Old 21st October 2021
sml1226 sml1226 is offline
Flat Track Champion
 
Join Date: Apr 2015
Posts: 653
Sportster/Buell Model: XL1275R
Sportster/Buell Year: 2004
sml1226 has disabled reputation
Default HSR idle mixture screw

Hey guys. I have an HSR42 that Iíve never been able to get right. I stuck an O2 sensor on to check AFR here recently and it doesnít seem to want to move any while turning the air screw. Iím not really sure if itís always been like this or not but I canít really tune the rest of the carb if the idle is never right.

The needle, needle jet, main, etc shouldn't be affecting me here, should they? Iíve had a 20 and a 22.5 in there so far and both seem to settle right around 13:1. I can get it to go richer, but even there, not a ton. I think it hit 11.5:1 before it stumbled.

So I guess the first question is, is there anything that would lead to the screw being largely useless? I canít see anything blocking the air passages. The air jet is a blank on these. The choke plunger, as far as I can tell, is fully seated. An air leak somewhere would have the opposite issue.

I can try a 17.5 jet too, as I do have one, but Iíd still expect the AFR to move even if the jet were too large.

Any other suggestions?
Reply With Quote
 

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 23:42.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2023, vBulletin Solutions Inc.
XL Forumģ - Linson Media LLC