The Sportster and Buell Motorcycle Forum Mother Road Customs  

Go Back   The Sportster and Buell Motorcycle Forum > SPORTSTER MOTORCYCLE ZONE > Sportster Motorcycle Intake and Exhaust > Sportster Motorcycle Air intake, Carburetor, EFI, Fuel, and Exhaust
XLF Gallery XLF Classifieds XLF Blogs XLF Shout 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.

Members Birthdays
wallylach (63), cob (60), decman (58), djhannu (52), Vaughn, irishhog (45), dangjalopy (41), earthoverdrive (36), edman87k5 (35), 79iron (32), mr_anti_chrome
NRHS Performance Long 2
RYCA Motors
Hammer Performance
Hammer Performance

Energy One Clutches
Tags
carb, cv carb, fuel

Reply
 
Share Thread Tools Display Modes
  #1  
Old 13th June 2008
NC_REDNECK_1981's Avatar
NC_REDNECK_1981 NC_REDNECK_1981 is offline
Know It All
 
Join Date: Jun 2008
Location: united states
Posts: 185
Sportster/Buell Model: xlh
Sportster/Buell Year: 1988
Sportster/Buell Model #2: xlh
Sportster/Buell Year #2: 1984
Reputation: 74
NC_REDNECK_1981 is an unknown quantity at this point
Default help me figure this out please

im new to this forum so dont bash me to hard please. i have 1988 1200 sportster with a stock engine. i bought this bike a cpl months ago and it already had drag pipes on it and averaged about 80 miles to the tank(2.2). well i installed a se air cleaner with a k&n filter and installed 45/175 jets as i was told by the stealership. the bike runs great but ionly get about 45 miles out of the tank. can anyone help me out and tell me what is wrong?
Reply With Quote
  #2  
Old 13th June 2008
wilbur's Avatar
wilbur wilbur is offline
The crazy one...
 
Join Date: Mar 2006
Location: Heatville
Posts: 2,517
Sportster/Buell Model: rigid 88" highly modified
Sportster/Buell Year: 2003
Sportster/Buell Model #2: iforgot
Sportster/Buell Year #2: 80's
Other Motorcycle Model: crs
Other Motorcycle Year: 80's
Reputation: 43342
wilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to behold
Default

look around at other 1200's. that mileage is about par with that setup...
__________________

It is now "later" than it has ever been!
Reply With Quote
  #3  
Old 13th June 2008
jharback's Avatar
jharback jharback is offline
XL FORUM TEAM MEMBER
 
Join Date: Dec 2006
Location: Sunny Italy
Posts: 17,155
Sportster/Buell Model: XLH 1200
Sportster/Buell Year: 1993
Other Motorcycle Model: Moto Guzzi California EV
Other Motorcycle Year: 1998
Reputation: 930691
jharback has a reputation beyond reputejharback has a reputation beyond reputejharback has a reputation beyond reputejharback has a reputation beyond reputejharback has a reputation beyond reputejharback has a reputation beyond reputejharback has a reputation beyond reputejharback has a reputation beyond reputejharback has a reputation beyond reputejharback has a reputation beyond reputejharback has a reputation beyond repute
Default

Quote:
Originally Posted by wilbur View Post
look around at other 1200's. that mileage is about par with that setup...
He said 45 miles to the tank not per gallon. That mileage is much too low. Check your plugs to see if your running overly rich. Also double check to see if your leaking any gas from your petcock or gas lines. Are you losing gas after shutting the bike down thru the overflow?
__________________

Jim in Italy
'93 1200
4"Extended Jaybrake Forward Controls
58mm Inverted Wide Glide Front End
Super E Carb w/Forcewinder Air Cleaner
WetDreamz Pipes
Holographic Metal Flake Paint Job
Six Piston Jaybrake Calipers
16" Carlini Apes
Reply With Quote
  #4  
Old 13th June 2008
NC_REDNECK_1981's Avatar
NC_REDNECK_1981 NC_REDNECK_1981 is offline
Know It All
 
Join Date: Jun 2008
Location: united states
Posts: 185
Sportster/Buell Model: xlh
Sportster/Buell Year: 1988
Sportster/Buell Model #2: xlh
Sportster/Buell Year #2: 1984
Reputation: 74
NC_REDNECK_1981 is an unknown quantity at this point
Default

i used to see gas dripping a little bit when i first started the bike but that doesnt happen anymore. the other night i accidentally left the petcock on all night and i didnt see any gas on the ground the next morning. if its running that rich wouldnt i see black smoke out of the pipes? i have no knowledge of a cv carb at all. i can work on cars but ive never worked on a motorcycle.
Reply With Quote
  #5  
Old 13th June 2008
NC_REDNECK_1981's Avatar
NC_REDNECK_1981 NC_REDNECK_1981 is offline
Know It All
 
Join Date: Jun 2008
Location: united states
Posts: 185
Sportster/Buell Model: xlh
Sportster/Buell Year: 1988
Sportster/Buell Model #2: xlh
Sportster/Buell Year #2: 1984
Reputation: 74
NC_REDNECK_1981 is an unknown quantity at this point
Default

if imy plugs say its to rich how do i lean it down? with the factory jets and the se ac and pipes it was way to lean. the plugs were bone white and wouldnt take any throttle
Reply With Quote
Know Thy Hog

  #6  
Old 13th June 2008
wilbur's Avatar
wilbur wilbur is offline
The crazy one...
 
Join Date: Mar 2006
Location: Heatville
Posts: 2,517
Sportster/Buell Model: rigid 88" highly modified
Sportster/Buell Year: 2003
Sportster/Buell Model #2: iforgot
Sportster/Buell Year #2: 80's
Other Motorcycle Model: crs
Other Motorcycle Year: 80's
Reputation: 43342
wilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to behold
Default

Quote:
Originally Posted by jharback View Post
He said 45 miles to the tank not per gallon. That mileage is much too low. Check your plugs to see if your running overly rich. Also double check to see if your leaking any gas from your petcock or gas lines. Are you losing gas after shutting the bike down thru the overflow?
OMG how did I overlook that? Yes, 20 mpg is a little to low! If the gas isn't dripping out, make sure your float is OK and not "running" into the engine. Plug check also.
Reply With Quote
  #7  
Old 13th June 2008
Terp84Alum's Avatar
Terp84Alum Terp84Alum is offline
Senior Custom Bike Builder
 
Join Date: Sep 2006
Location: Middletown, MD
Posts: 2,648
Sportster/Buell Model: 94 HP XL1200C sold :(
Sportster/Buell Year: 2002
Sportster/Buell Model #2: Yamaha Raider
Sportster/Buell Year #2: 2010
Other Motorcycle Model: Yamaha FZ1
Other Motorcycle Year: 2008
Reputation: 44267
Terp84Alum is a splendid one to beholdTerp84Alum is a splendid one to beholdTerp84Alum is a splendid one to beholdTerp84Alum is a splendid one to beholdTerp84Alum is a splendid one to beholdTerp84Alum is a splendid one to beholdTerp84Alum is a splendid one to beholdTerp84Alum is a splendid one to beholdTerp84Alum is a splendid one to beholdTerp84Alum is a splendid one to beholdTerp84Alum is a splendid one to behold
Default

Is someone stealing your gas?
__________________
Ken from Maryland

**RIP MR. JIMI & JOHNNY G**
Reply With Quote
  #8  
Old 13th June 2008
wilbur's Avatar
wilbur wilbur is offline
The crazy one...
 
Join Date: Mar 2006
Location: Heatville
Posts: 2,517
Sportster/Buell Model: rigid 88" highly modified
Sportster/Buell Year: 2003
Sportster/Buell Model #2: iforgot
Sportster/Buell Year #2: 80's
Other Motorcycle Model: crs
Other Motorcycle Year: 80's
Reputation: 43342
wilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to beholdwilbur is a splendid one to behold
Default

Quote:
Originally Posted by NC_REDNECK_1981 View Post
if imy plugs say its to rich how do i lean it down? with the factory jets and the se ac and pipes it was way to lean. the plugs were bone white and wouldnt take any throttle
Are these new plugs?
Reply With Quote
  #9  
Old 13th June 2008
biknut's Avatar
biknut biknut is offline
Senior Master Custom Bike Builder
 
Join Date: Sep 2006
Location: Dallas
Posts: 7,734
Sportster/Buell Model: XLH 1200
Sportster/Buell Year: 1988
Reputation: 40142
biknut is a splendid one to beholdbiknut is a splendid one to beholdbiknut is a splendid one to beholdbiknut is a splendid one to beholdbiknut is a splendid one to beholdbiknut is a splendid one to beholdbiknut is a splendid one to beholdbiknut is a splendid one to beholdbiknut is a splendid one to beholdbiknut is a splendid one to beholdbiknut is a splendid one to behold
Default

Quote:
Originally Posted by NC_REDNECK_1981 View Post
im new to this forum so dont bash me to hard please. i have 1988 1200 sportster with a stock engine. i bought this bike a cpl months ago and it already had drag pipes on it and averaged about 80 miles to the tank(2.2). well i installed a se air cleaner with a k&n filter and installed 45/175 jets as i was told by the stealership. the bike runs great but ionly get about 45 miles out of the tank. can anyone help me out and tell me what is wrong?
So you're saying you're only getting about 23 mpg? If that's the case something is very wrong.

I guess you know it won't run very well at low speeds with open drag pipes. That's probably not your problem though. 88 model 1200s came with 200 main jets from the factory. The stock CV carb didn't have an accelerator pump. I hope it doesn't still have the stock rubber intake manifold. If so it's worn out.

My bike, also an 88 model, got well over 50 mpg set up like your bike except with stock headers and SE mufflers.

Tell me more about your bike.
__________________
Completely stock except for, Branch #5 heads & 10.5:1 JE pistons, Red Shift V531 cams, S&S Super E, ThunderJet, V&H Sideshots, S&S Flywheels, Dyna 2000i, Stortz 55mm Inverted Fork, JMC Swingarm, Works Performance 12.5" Shocks, PM 4 Piston, PM wheels, 18 x 150 R tire, Custom Belt Drive Conversion, Still Has Original Nut Behind The Bars
Reply With Quote
  #10  
Old 13th June 2008
SpringerSam's Avatar
SpringerSam SpringerSam is offline
Senior Chief Harley Engineer
 
Join Date: May 2007
Location: Detroit Red Wings Country
Posts: 1,018
Sportster/Buell Model: xlch
Sportster/Buell Year: 70
Sportster/Buell Model #2: Softail Springer
Sportster/Buell Year #2: 2006
Reputation: 312
SpringerSam is on a distinguished roadSpringerSam is on a distinguished roadSpringerSam is on a distinguished roadSpringerSam is on a distinguished road
Default

Welcome to the forum...

Go back to the original components one at a time...find out which change affected the mileage. It seems almost unrealistic to cut your mileage in half.

Sam
Reply With Quote
Know Thy Hog

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


Custom Search

All times are GMT +1. The time now is 11:52.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
XL Forum - Linson Media LLC