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

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 Dreaded carb again
Last Post: Iron Mike
Posted On: 26 Minutes Ago
Replies: 19
Views: 489
0 oil pump
Last Post: factory rat
Posted On: 37 Minutes Ago
Replies: 0
Views: 12
0 Please help with muffler identification
Last Post: RKN
Posted On: 55 Minutes Ago
Replies: 2
Views: 120
0 teflon buttons or circlips?
Last Post: kitabel
Posted On: 56 Minutes Ago
Replies: 38
Views: 1,400
0 1985 Ironhead, help with dynatek 2000 install
Last Post: atengnr
Posted On: 1 Hour Ago
Replies: 3
Views: 93
0 Keep & Kill
Last Post: Graywolf
Posted On: 1 Hour Ago
Replies: 24,094
Views: 1,420,702
0 Where To Get Free Air
Last Post: wedge
Posted On: 1 Hour Ago
Replies: 3
Views: 165
0 This is gonna hurt.
Last Post: wedge
Posted On: 1 Hour Ago
Replies: 8,834
Views: 2,045,753
0 1972 Build thread please subscribe
Last Post: wedge
Posted On: 1 Hour Ago
Replies: 164
Views: 22,098
0 I bought a Sportster last month, but I don't know what to do now, when it leaked the
Last Post: wedge
Posted On: 1 Hour Ago
Replies: 37
Views: 1,901
0 What song do you have stuck in your head?
Last Post: NLXL
Posted On: 2 Hours Ago
Replies: 2,389
Views: 248,381
0 Food porn
Last Post: Graywolf
Posted On: 2 Hours Ago
Replies: 2,454
Views: 559,946
0 Iree's late night cafe
Last Post: ~Grind~
Posted On: 2 Hours Ago
Replies: 2,088
Views: 339,109
0 Hottie of the day, no nudity.
Last Post: Stairman
Posted On: 2 Hours Ago
Replies: 31,548
Views: 3,620,021
0 Intake Seals
Last Post: Tomcatt
Posted On: 3 Hours Ago
Replies: 3
Views: 63
0 Piston melted
Last Post: RicThompson
Posted On: 3 Hours Ago
Replies: 31
Views: 1,112
0 Bob The Chicken
Last Post: Crusty
Posted On: 5 Hours Ago
Replies: 0
Views: 70
10 Introduction
Last Post: juzyHD
Posted On: 6 Hours Ago
Replies: 7
Views: 88
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: Stairman
Posted On: 6 Hours Ago
Replies: 51,712
Views: 8,680,814
0 82 XLH in Arkaksas
Last Post: Folkie
Posted On: 7 Hours Ago
Replies: 4
Views: 74
0 Venhill cable
Last Post: 93trident
Posted On: 8 Hours Ago
Replies: 2
Views: 99
0 Help & advice needed
Last Post: Andy Hog
Posted On: 9 Hours Ago
Replies: 21
Views: 719
0 My 99 883 c
Last Post: 99-883-c
Posted On: 9 Hours Ago
Replies: 44
Views: 2,989
0 Electrical problems.
Last Post: Andy Hog
Posted On: 9 Hours Ago
Replies: 9
Views: 265
0 This week on Craig's list
Last Post: Iron Mike
Posted On: 12 Hours Ago
Replies: 5,344
Views: 859,234
0 New to HD
Last Post: Tyler45
Posted On: 13 Hours Ago
Replies: 12
Views: 257
0 Happy Birthday Crusty and Joes95bobber!
Last Post: Crusty
Posted On: 14 Hours Ago
Replies: 12
Views: 316
0 Cam followers have locked up internally. No movement at all. Why?
Last Post: Hippysmack
Posted On: 14 Hours Ago
Replies: 3
Views: 128
0 LED Headlight?
Last Post: ryder rick
Posted On: 15 Hours Ago
Replies: 14
Views: 1,002
0 Anyone know who can shorten fork tubes?
Last Post: Whitewalls
Posted On: 15 Hours Ago
Replies: 3
Views: 145
More...
Members Birthdays
PlanB, Cuco6924 (75), 1200sporty (64), iron68 (50), LifesHarlequin (37), mattosm (36)
Reply
 
Share Thread Tools Display Modes
  #1  
Old 14th October 2005
merc merc is offline
Senior Master Custom Bike Builder
 
Join Date: Jul 2005
Location: 3 houses north of the Massholes
Posts: 6,105
Sportster/Buell Model: Custom
Sportster/Buell Year: 05
Other Motorcycle Model: Suzuki GN400
Other Motorcycle Year: 1980
Reputation: 291030
merc has a reputation beyond reputemerc has a reputation beyond reputemerc has a reputation beyond reputemerc has a reputation beyond reputemerc has a reputation beyond reputemerc has a reputation beyond reputemerc has a reputation beyond reputemerc has a reputation beyond reputemerc has a reputation beyond reputemerc has a reputation beyond reputemerc has a reputation beyond repute
Default carb adjusting- Where are the jets and the mixture screw?

I put on cycle shack slip on mufflers and a K&N a filter. The bike pops every now and then when going slow and I twist the throttle.
I know that I need to rejet the carb and/or adjust the air flow/gas mixture.
I have read Stevo's jetting 101 and his continued post several times. I understand the why's but I still need the hows.
I am a little mechanical and will tackle any project if I have directions.
Does anyone know where I can get expicit directions as to HOW to do the mechanical work?
Do I take the carb off to do it or can it be done on the bike?
I read something needs to be drilled out. WHAT? And where is it? what does it look like? etc?
I would need something similar to a step by step procedure like what comes in a box when you buy bycicles that have to be put together.
thanks
Reply With Quote
  #2  
Old 14th October 2005
paulieb paulieb is offline
Biker
 
Join Date: Apr 2005
Location: Midwest
Posts: 13
Sportster/Buell Model: XL 883
Sportster/Buell Year: 2005
Reputation: 10
paulieb is an unknown quantity at this point
Default

here is a dynojet instruction sheet. ( i am not advocating the dynojet )
it has some diagrams that may help.

http://www.dynojet.com/pdf/8134.pdf

paulieb
Reply With Quote
  #3  
Old 14th October 2005
cantolina's Avatar
cantolina cantolina is offline
Luvs me an artsy chick...
 
Join Date: Nov 2004
Location: Chautauqua County, NY
Posts: 11,843
Sportster/Buell Model: 883>1200 XLH
Sportster/Buell Year: 97
Reputation: 238897
cantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant future
Default

Here are some pretty specific instructions...take the carb off the bike first...

They're on another site, but the author is a member here, too..

http://www.sportster.org/tech/carb/rejetting.shtml

When you pull the bowl, (DO NOT TOUCH THE FLOATS!!!)this is what you will see:



The obvious one is the main jet...it is inserted into the emulsion tube...

Sometimes, they will come out together:



You WON'T really need to do anything with this, unless you just want to clean it, which is a good idea....

The pilot jet is sorta hidden in a hole, off to the side of where the emulsion tube is..but you see it here, partially removed:



This is the jet you will want to consider changing....only a coupla sizes at most...

If your stock is a 42, try a 45...etc..

Leave the main as it is....

Here are both jets, and the emulsion tube, removed from the carb:



Now, Here's a pic of the bottom of the carb:



The circled part is where you drill out the plug...

Be careful when you do this....

Put some electricians tape on the end of the drill bit like this:



You only need a hole in the cap.....use a screw to pop that cap off....

Then, your carb will look like the picture above...

THAT is where the mixture screw is....

Once you've done this, soft seat it all the way in (I DO MEAN SOFT!), then back it out 2-2 1/2 turns...a great place to start

NOTE: DO NOT take the mixture screw out.....there's no reason to, and there are parts inside there you don't wanna play with (OR LOSE), or reinsert wrong.....

Put the carb all back together, put it on the bike, and the only thing you should need to do from then on is find a screwdriver that fits into the hole for the mixture screw, to adjust as needed...

See? You can do it!!

Good Luck!
__________________
~Chuck

"entia non sunt multiplicanda praeter necessitatem"


Occam's Razor...

in English: "entities must not be multiplied beyond necessity."
My definition: "The simplest answers are the most likely"

~NRHS machined 1200 conversion, shittin and gettin...

XLF Tuning Stickies

Charging system troubleshooting





Last edited by cantolina; 9th April 2007 at 00:58..
Reply With Quote
  #4  
Old 14th October 2005
Turbota's Avatar
Turbota Turbota is offline
Senior Master Custom Bike Builder
 
Join Date: Nov 2004
Location: Philippines
Posts: 5,258
Reputation: 8681
Turbota is a glorious beacon of lightTurbota is a glorious beacon of lightTurbota is a glorious beacon of lightTurbota is a glorious beacon of lightTurbota is a glorious beacon of lightTurbota is a glorious beacon of lightTurbota is a glorious beacon of lightTurbota is a glorious beacon of lightTurbota is a glorious beacon of lightTurbota is a glorious beacon of lightTurbota is a glorious beacon of light
Default

Chuck ....

Great post!

Great photos!
Reply With Quote
  #5  
Old 14th October 2005
RoadKingMoe RoadKingMoe is offline
Flat Track Racer
 
Join Date: Sep 2005
Posts: 235
Sportster/Buell Model: XL883 Hugger
Sportster/Buell Year: 2001
Other Motorcycle Model: Road King
Other Motorcycle Year: 2000
Reputation: 20
RoadKingMoe is an unknown quantity at this point
Default

Those pictures are VERY helpful! If I might add a couple of things to this thread.

Many emulsion tubes have flats for a wrench, 5/16" IIRC. If you use this, you can remove the main jet without removing the emulsion tube.

If you do remove the emulsion tube, the needle jet that sits on top of it may also come out. You can see the top of it in the carb throat. Lower it out carefully so that it doesn't hit the floor, roll or bounce, and be captured forever by the garage gremlins. Also note the orientation of the needle jet if you remove it. It's not the same on each end.

When removing the slow jet, you may need to make a special screwdriver. You need a tip that is wide and thick enough to fill the slot in the slow jet or you can bugger it up. The "slot" is actually two slots, one on either side of the hole, and you need to get good screwdriver tip contact in both of them. Unfortunately, many screwdrivers are wider above the tip and if you get one with a sufficiently wide tip, it's too wide above that. If you try to force one of these down in the cast-in tube, you can crack the carb body. You can always put the screwdriver on a grinding wheel to get this flare out of it.

Let me also add emphasis to drilling the plug carefully. If you let the drill bit "break through" the plug quickly, it can dig into the idle mixture adjustment screw and spin it closed hard. This can damage it. Don't push on the drill. Let the bit do the work.

Hundreds have done this with my step-by-step instructions Catolina linked to on Sportster.Org. Many of them had never turned a wrench before. You can do it too.
Reply With Quote
  #6  
Old 14th October 2005
cantolina's Avatar
cantolina cantolina is offline
Luvs me an artsy chick...
 
Join Date: Nov 2004
Location: Chautauqua County, NY
Posts: 11,843
Sportster/Buell Model: 883>1200 XLH
Sportster/Buell Year: 97
Reputation: 238897
cantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant future
Default

Quote:
Originally Posted by RoadKingMoe
Those pictures are VERY helpful! If I might add a couple of things to this thread.

Many emulsion tubes have flats for a wrench, 5/16" IIRC. If you use this, you can remove the main jet without removing the emulsion tube.

If you do remove the emulsion tube, the needle jet that sits on top of it may also come out. You can see the top of it in the carb throat. Lower it out carefully so that it doesn't hit the floor, roll or bounce, and be captured forever by the garage gremlins. Also note the orientation of the needle jet if you remove it. It's not the same on each end.

When removing the slow jet, you may need to make a special screwdriver. You need a tip that is wide and thick enough to fill the slot in the slow jet or you can bugger it up. The "slot" is actually two slots, one on either side of the hole, and you need to get good screwdriver tip contact in both of them. Unfortunately, many screwdrivers are wider above the tip and if you get one with a sufficiently wide tip, it's too wide above that. If you try to force one of these down in the cast-in tube, you can crack the carb body. You can always put the screwdriver on a grinding wheel to get this flare out of it.

Let me also add emphasis to drilling the plug carefully. If you let the drill bit "break through" the plug quickly, it can dig into the idle mixture adjustment screw and spin it closed hard. This can damage it. Don't push on the drill. Let the bit do the work.

Hundreds have done this with my step-by-step instructions Catolina linked to on Sportster.Org. Many of them had never turned a wrench before. You can do it too.
Thanx, Maurice....good points...

And from the man who got me started on this crap....
Reply With Quote
  #7  
Old 15th October 2005
merc merc is offline
Senior Master Custom Bike Builder
 
Join Date: Jul 2005
Location: 3 houses north of the Massholes
Posts: 6,105
Sportster/Buell Model: Custom
Sportster/Buell Year: 05
Other Motorcycle Model: Suzuki GN400
Other Motorcycle Year: 1980
Reputation: 291030
merc has a reputation beyond reputemerc has a reputation beyond reputemerc has a reputation beyond reputemerc has a reputation beyond reputemerc has a reputation beyond reputemerc has a reputation beyond reputemerc has a reputation beyond reputemerc has a reputation beyond reputemerc has a reputation beyond reputemerc has a reputation beyond reputemerc has a reputation beyond repute
Default

awesome instructions guys.
I read the link and matched it back and forth to the pics.
G-R-E-A-T instructions.
I will be doing this myself in a few days thanks to your postsThanks
Paul
Reply With Quote
  #8  
Old 15th October 2005
Ken Man Do's Avatar
Ken Man Do Ken Man Do is offline
Chief Know It All
 
Join Date: Jul 2005
Location: NE Ohio
Posts: 415
Sportster/Buell Model: 1200
Sportster/Buell Year: '93
Reputation: 20
Ken Man Do is an unknown quantity at this point
Default

Quote:
Originally Posted by cantolina
You can do it!!
Great. Now I've got this visual.
Reply With Quote
  #9  
Old 16th October 2005
cantolina's Avatar
cantolina cantolina is offline
Luvs me an artsy chick...
 
Join Date: Nov 2004
Location: Chautauqua County, NY
Posts: 11,843
Sportster/Buell Model: 883>1200 XLH
Sportster/Buell Year: 97
Reputation: 238897
cantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant future
Default

Quote:
Originally Posted by Ken Man Do
Great. Now I've got this visual.
That's awesome...

Same pic came into my head when I wrote that!

But it was the one from the Geico commercial....
Reply With Quote
  #10  
Old 16th October 2005
cantolina's Avatar
cantolina cantolina is offline
Luvs me an artsy chick...
 
Join Date: Nov 2004
Location: Chautauqua County, NY
Posts: 11,843
Sportster/Buell Model: 883>1200 XLH
Sportster/Buell Year: 97
Reputation: 238897
cantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant futurecantolina has a brilliant future
Default

Quote:
Originally Posted by merc
awesome instructions guys.
I read the link and matched it back and forth to the pics.
G-R-E-A-T instructions.
I will be doing this myself in a few days thanks to your postsThanks
Paul
That's awesome....

I always get jazzed when someone takes their bike on by themselves...

Its NOT voodoo.....

I never thought to actually match the pics to Maurice's instructions, but, then again, I first learned how to tear my carb apart from HIM (via those exact instructions), so I guess I shouldn't be surprised...

Let us know how it comes out!
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 20:15.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
XL Forum® - Linson Media LLC