The Sportster and Buell Motorcycle Forum - The XLFORUM®
 

Go Back   The Sportster and Buell Motorcycle Forum - The XLFORUM® > 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

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 Lets see your off season builds
Last Post: Tinz
Posted On: 3 Minutes Ago
Replies: 1,291
Views: 166,425
0 Code U1255 sputters and dies
Last Post: sportsterdoc
Posted On: 56 Minutes Ago
Replies: 11
Views: 249
0 In a crash: Lucky to be alive
Last Post: lostNdallas
Posted On: 1 Hour Ago
Replies: 34
Views: 557
0 Transformer XR1200
Last Post: Davo_137
Posted On: 1 Hour Ago
Replies: 31
Views: 1,372
0 Amazing without the windshield.
Last Post: Crusty
Posted On: 1 Hour Ago
Replies: 195
Views: 36,604
0 Whats on your head?
Last Post: mikeLI_77
Posted On: 2 Hours Ago
Replies: 18
Views: 252
0 Fat Bob tanks on a 93 Sportster
Last Post: Dshank14
Posted On: 2 Hours Ago
Replies: 0
Views: 20
0 Starter/solenoid issue
Last Post: Dshank14
Posted On: 2 Hours Ago
Replies: 0
Views: 35
0 answer with a question game
Last Post: Hippysmack
Posted On: 3 Hours Ago
Replies: 136
Views: 5,473
0 Craiglist finds
Last Post: NLXL
Posted On: 3 Hours Ago
Replies: 4
Views: 210
5 1200 or 883
Last Post: boomerguy
Posted On: 4 Hours Ago
Replies: 1,023
Views: 311,516
0 Misfire 02 883
Last Post: Thegen58
Posted On: 4 Hours Ago
Replies: 43
Views: 1,054
0 Why I don't have a HID Headlight Poll
Last Post: Toejam503
Posted On: 4 Hours Ago
Replies: 135
Views: 36,541
0 This week on Craig's list
Last Post: 72 Ironhead XLH
Posted On: 4 Hours Ago
Replies: 3,974
Views: 451,891
0 What engine oil do you use?
Last Post: Clevspeed
Posted On: 4 Hours Ago
Replies: 444
Views: 87,680
0 headlight upgrade
Last Post: Dcoff
Posted On: 4 Hours Ago
Replies: 11
Views: 235
3 Wtb, Wts, Wtt, Wtg (Ironhead)
Last Post: 72 Ironhead XLH
Posted On: 5 Hours Ago
Replies: 149
Views: 224,615
5 Harley T-Shirts
Last Post: Toejam503
Posted On: 5 Hours Ago
Replies: 282
Views: 43,729
0 New handlebar wiring harness 81XLH?
Last Post: Toejam503
Posted On: 5 Hours Ago
Replies: 6
Views: 283
0 Head gasket leak.
Last Post: lucifer_mr2
Posted On: 5 Hours Ago
Replies: 5
Views: 170
0 Do you use premium gas in your Sportster?
Last Post: Toejam503
Posted On: 6 Hours Ago
Replies: 1,738
Views: 350,819
0 (Do) (Are) Loud Exhausts__________.
Last Post: Eddieblz
Posted On: 6 Hours Ago
Replies: 26
Views: 3,156
0 Ever been pulled over?
Last Post: Sprtstr1200s
Posted On: 6 Hours Ago
Replies: 434
Views: 91,009
0 Regulator battery draw
Last Post: sportsterdoc
Posted On: 6 Hours Ago
Replies: 3
Views: 63
6 Calling all musicians
Last Post: Eddieblz
Posted On: 6 Hours Ago
Replies: 375
Views: 16,015
0 Ran out of gas.
Last Post: sportsterpaul
Posted On: 6 Hours Ago
Replies: 149
Views: 17,068
14 Post your Bike in a Cemetary Pic
Last Post: Toejam503
Posted On: 6 Hours Ago
Replies: 337
Views: 59,281
0 Hottie of the day, no nudity.
Last Post: sportsterpaul
Posted On: 6 Hours Ago
Replies: 10,798
Views: 955,878
0 Safe Max Rev Limit stock engine Roadster 2017
Last Post: eduardox23
Posted On: 8 Hours Ago
Replies: 19
Views: 446
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: Graywolf
Posted On: 9 Hours Ago
Replies: 43,515
Views: 6,796,669
More...
Members Birthdays
WinXP (68), Maggie (62), grancan1 (54), SRKASM (48), metalmessiah, o113attitude (44), stinkynate (36), wingman_214 (35)
Tags
cv40, mixture screw

Sponsored Links
Reply
 
Share Thread Tools Display Modes
  #21  
Old 17th November 2018
sportsterdoc's Avatar
sportsterdoc sportsterdoc is offline
Senior Master Custom Bike Builder
 
Join Date: Apr 2012
Location: Mojave Desert
Posts: 13,235
Sportster/Buell Model: 1200S
Sportster/Buell Year: 2002
Sportster/Buell Model #2: XLH883
Sportster/Buell Year #2: 2003
Reputation: 5350604
sportsterdoc has a reputation beyond reputesportsterdoc has a reputation beyond reputesportsterdoc has a reputation beyond reputesportsterdoc has a reputation beyond reputesportsterdoc has a reputation beyond reputesportsterdoc has a reputation beyond reputesportsterdoc has a reputation beyond reputesportsterdoc has a reputation beyond reputesportsterdoc has a reputation beyond reputesportsterdoc has a reputation beyond reputesportsterdoc has a reputation beyond repute
Default

Quote:
Originally Posted by AIE10 View Post
Now the vacuum line from petcock was definitely causing the idle to drop a small amount when I disconnected it a blocked the vacuum port off on the carby. Not sure if fuel is getting sucked through or not..
Not following your wording, but if you are still using a vacuum operated petcock and the diaphragm has never been replaced, it is past time to do so or convert to a mechanical petcock.

Vacuum goes from carb with T to vacuum petcock and VOES.

Vacuum loss (if there is a vacuum loss) potential is
a. hose cracked
b. T cracked
c. vacuum operated petcock vacuum diaphragm cracked, which would suck fuel, instead of air
d. VOES diaphragm cracked
Reply With Quote
  #22  
Old 17th November 2018
wtwolf's Avatar
wtwolf wtwolf is offline
Biker
 
Join Date: Oct 2011
Posts: 21
Sportster/Buell Model: sportster
Sportster/Buell Year: 2001
Reputation: 722
wtwolf will become famous soon enoughwtwolf will become famous soon enoughwtwolf will become famous soon enoughwtwolf will become famous soon enoughwtwolf will become famous soon enoughwtwolf will become famous soon enoughwtwolf will become famous soon enough
Default

there is an air bleed involved in idle circuit.looking in carb opening with a/c off located toward bottom very small hole (1/16 ?).spray carb cleaner & blow out with air.
Reply With Quote
  #23  
Old 18th November 2018
IXL2Relax's Avatar
IXL2Relax IXL2Relax is offline
XL FORUM TEAM MEMBER
 
Join Date: Feb 2013
Location: Let Freedom Ring in PA
Posts: 6,162
Sportster/Buell Model: Sportster 883►1200
Sportster/Buell Year: 1994
IXL2Relax has disabled reputation
Default

Quote:
Originally Posted by AIE10 View Post
Now the vacuum line from petcock was definitely causing the idle to drop a small amount when I disconnected it a blocked the vacuum port off on the carby.
By removing the vacuum hose from the carb, you are causing the VOES to switch to the Retarded Curve (less Advanced Timing - if the VOES is working correctly). Note this from the Sportsterpedia:

"When the engine is running at idle, when lightly accelerating or when using a steady cruise throttle, manifold vacuum is high (the throttle plate is mostly closed) and the VOES switch is ON, causing the ICM to use the MORE ADVANCED CURVE."

Quote:
Originally Posted by wtwolf View Post
there is an air bleed involved in idle circuit.looking in carb opening with a/c off located toward bottom very small hole (1/16 ?).spray carb cleaner & blow out with air.
See the pics in the Sportsterpedia:
http://sportsterpedia.com/doku.php/techtalk:evo:carb02

And if you haven't, I would again suggest looking carefully at the placement of the throttle plate...

IXL _______ >>>> My Motorcyle Chronicles Are Here<<<<
For FREE Sportster Tech Info, catalogued from the XLForum,
Check Out The Sportsterpedia
__________________
### The ride is more enjoyable to nowhere in particular! ###
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



Sponsored Links
All times are GMT +1. The time now is 06:21.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
XL Forum® - Linson Media LLC