Question about Harley Davidson FXST Softail Standard Motorcycles

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Carburetor and intake for a 1991 fxst - FXST Softail Standard Harley Davidson Motorcycles

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Hi, Randy for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry. For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below and for more specific information or questions at no charge please feel free to contact me at xlch@mail.com. Good luck and have a wonderful day.
1991 Harley Davidson Softail Custom FXSTC Carburetor
http://www.carlsalter.com/pdfs/Harley%20Davidson-HD%201984-1998%20FLH-FLHT-FXR-FXSB-FXEF%20Service%20Manual.pdf
http://partsfinder.onlinemicrofiche.com/ronnies/showmodel.asp?make=hdmc
http://www.harley-davidson.com/content/h-d/en_US/home/owners/maintain-your-bike/owners-manual.html
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Posted on Apr 20, 2017

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91 intruder not run on mid and high.Only idile work


Hi, Adam and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition or leaking.
3. Spark plug gap too close or too wide.
4. Faulty ignition coil, module and or sensor.
5. Battery nearly discharged.
6. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
7. Intermittent short circuit due to damaged wire insulation.
8. Water or dirt in the fuel system, carburetor or filter.
9. Fuel tank vent system plugged or carburetor vent line closed off.
10. Carburetor controls misadjusted.
11. Damaged carburetor or intake seals.
12. Loose or dirty ignition module connector at crankcase.
13. Faulty MAP, CKP, O2, and or CMP sensors.
14. Incorrect valve timing.
15. Weak or broken valve springs.
16. Damage intake or exhaust valve.
For more information about your issue, please visit the websites below. Good luck and have a nice day.
https://www.tradebit.com/filesharing.php/search/0/1991+suzuki+vs+1400+intruder

Aug 23, 2015 | 1991 Suzuki VS 1400 Intruder

1 Answer

2005 FI softail standard. popping, sputtering, idle up and down, dash reads Po347 (crank position sensor) Removed and replaced sensor, motor still does the above. Removed aftermarket TFI system, hooked up...


Hi Anonymous, you might need to upgrage your fuel tuner or try the list below and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition or leaking.
3. Spark plug gap to close or to wide.
4. Faulty ignition coil, module and or sensor.
5. Battery nearly discharged.
6. Damaged wire or loose connections at battery terminals,
ignition coil, or plug between ignition sensor and module.
7. Intermittent short circuit due to damaged wire insulation.
8. Water or dirt in fuel system, carburetor or filter.
9. Fuel tank vent system plugged or carburetor vent line closed off.
10. Carburetor controls misadjusted.
11. Damaged carburetor.
12. Loose or dirty ignition module connector at crankcase.
13. Faulty MAP, CKP, and or CMP sensors.
14. Incorrect valve timing.
15. Weak or broken valve springs.
16. Damage intake or exhaust vale.
For a prime suspect please visit website below and good luck:
Harley Diagnostic Codes 04 to Present

Sep 07, 2013 | 2005 Harley Davidson FXST - FXSTI Softail...

1 Answer

Harley 2006 softail standard pops runs rough when starting


Hi Anonymous, and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition or leaking.
3. Spark plug gap to close or to wide.
4. Faulty ignition coil, module and or sensor.
5. Battery nearly discharged.
6. Damaged wire or loose connections at battery terminals,
ignition coil, or plug between ignition sensor and module.
7. Intermittent short circuit due to damaged wire insulation.
8. Water or dirt in fuel system, carburetor or filter.
9. Fuel tank vent system plugged or carburetor vent line closed off.
10. Carburetor controls misadjusted.
11. Damaged carburetor.
12. Loose or dirty ignition module connector at crankcase.
13. Faulty MAP, CKP, and or CMP sensors.
14. Incorrect valve timing.
15. Weak or broken valve springs.
16. Damage intake or exhaust vale.
For a prime suspect please visit website below and good luck:
Harley Diagnostic Codes 04 to Present

Aug 30, 2013 | 2006 Harley Davidson FXST Softail Standard

1 Answer

Starts fine after 10mins starts stalling dash lights go on and off


Hi James, and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition or leaking.
3. Spark plug gap to close or to wide.
4. Faulty ignition coil, module and or sensor.
5. Battery nearly discharged.
6. Damaged wire or loose connections at battery terminals,
ignition coil, or plug between ignition sensor and module.
7. Intermittent short circuit due to damaged wire insulation.
8. Water or dirt in fuel system, carburetor or filter.
9. Fuel tank vent system plugged or carburetor vent line closed off.
10. Carburetor controls misadjusted.
11. Damaged carburetor.
12. Loose or dirty ignition module connector at crankcase.
13. Faulty MAP, CKP, and or CMP sensors.
14. Incorrect valve timing.
15. Weak or broken valve springs.
16. Damage intake or exhaust vale.
For a prime suspect please visit website below and good luck:
Big Twin Carb EFI DTC Intructions codes Harley Davidson Forums Harley...

Jul 11, 2013 | 2000 Harley Davidson FXST Softail Standard

1 Answer

2002 h-d softail spits@back fires at low rpms


Hi Anonymous, and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition or leaking.
3. Spark plug gap to close or to wide.
4. Faulty ignition coil, module and or sensor.
5. Battery nearly discharged.
6. Damaged wire or loose connections at battery terminals,
ignition coil, or plug between ignition sensor and module.
7. Intermittent short circuit due to damaged wire insulation.
8. Water or dirt in fuel system, carburetor or filter.
9. Fuel tank vent system plugged or carburetor vent line closed off.
10. Carburetor controls misadjusted.
11. Damaged carburetor.
12. Loose or dirty ignition module connector at crankcase.
13. Faulty MAP, CKP, and or CMP sensors.
14. Incorrect valve timing.
15. Weak or broken valve springs.
16. Damage intake or exhaust vale.
For a prime suspect please visit website below and good luck:
Big Twin Carb EFI DTC Intructions codes Harley Davidson Forums Harley...

Apr 11, 2013 | 2002 Harley Davidson FXST Softail Standard

1 Answer

Rear cylinder blowing cold air out the exhaust on 1991 flhs with evo


Hi Anonymous, and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition or leaking.
3. Spark plug gap to close or to wide.
4. Faulty ignition coil, module and or sensor.
5. Battery nearly discharged.
6. Damaged wire or loose connections at battery terminals especially the negative cable at "BOTH" ends, ignition coil, or plug between ignition sensor and module.
7. Intermittent short circuit due to damaged wire insulation.
8. Water or dirt in fuel system, carburetor or filter.
9. Fuel tank vent system plugged or carburetor vent line closed off.
10. Carburetor controls misadjusted.
11. Damaged carburetor or intake seals.
12. Loose or dirty ignition module connector at crankcase.
13. Faulty MAP, CKP, and or CMP sensors.
14. Incorrect valve timing.
15. Weak or broken valve springs.
16. Damage intake or exhaust valve.
For a prime suspect please visit website below.
Good luck and have nice day.
Harley Davidson Wiring Diagrams and Schematics

Oct 30, 2012 | Harley Davidson Motorcycles

1 Answer

What type of keihin carburetor suits a FXST 1986-87


That year Softail came with the "butterfly type" Keihin carburetor. Refer to this site for a picture of the carb. http://www.bikebandit.com/1987-harley-davidson-fxst/o/m1504#sch173168 There are several versions of this carb that were used with the latest version being the best one. It had an additional mid-range fuel port in the venturi that solved a "dead spot" problem in the RPM range where most people normally ride. As best as I can remember, Harley went to the Keihin CV type carb in 1990.

If your bike does not have an carb on it at the time and you are not particularily wanting to restore the bike to exact original condition, I'd consider an S&S Super "E" Shorty carburetor. You can purchase the complete kit to change the carb from most aftermarket dealers and some H-D dealers. The original Keihin carb was not very popular with most riders and this is the carb that a lot of them chose to put on the engine in it's place. The newer Keihin CV carb was a much better carburetor and can be installed on the engine but it will require an intake manifold change as well. You may be able to locate one of these later carbs at a swap meet for a reasonable price.

Good Luck
Steve

Sep 05, 2011 | Harley Davidson FXST Softail Standard...

1 Answer

Does the 1991 saturn have individual fuel injectors


if you look along the intake manifold where its mounted to the engine there should be 4 individual sensor looking components(one for each cylinder) with a 2 wire connector fastened to them,then you have multi-point injection(one injector for each cylinder).if not then you have what is called throttle body injection which is one body with 1or2 injectors that supply fuel to all the cylinders.this looks similar to a small carburetor located in the center area of the intake manifold were all the intake runners come together.

Jun 13, 2011 | 1991 Saturn SL1

1 Answer

Will idle but when put in gear and moved will die


IDLE SPEED TO LOW.MANUAL TRANSMISSION IDLE SPEED IS 750 RPM AND AUTOMATIC TRANSMISSION IDLE SPEED IS 850 RPM.IF IDLE SPEED IS CORRECT YOUR PROBLEM COULD BE STOPPED UP FUEL FILTER OR FAULTY SPARK PLUGS AND WIRES.YOUR IGNITION TIMING IS OFF.YOU COULD HAVE INTAKE VACUUM LEAK AT INTAKE MANIFOLD OR EGR VALVE GASKET LEAKING OR BAD FUEL INJECTOR IF YOU HAVE FUEL INJECTION.FAULTY MECHANICAL FUEL PUMP IF CARBURETOR.ALSO CARBURETOR FLOAT BOWL TOO LOW.

Feb 15, 2010 | 1991 Toyota Pickup

1 Answer

Backfire through the intake at cruising speed, or idling, also backfire through exhaust when decelerating Runs fine during hard acceleration. Thought it was water in fuel, but dry gas did not solve the...


Intake:
Lean, or spark control problem, valve problem, bad fuel, plugged carburetor.

Exhaust:
excessively lean or rich with exhaust leak, valve problem, spark control problem.



Sep 28, 2009 | 2004 Harley Davidson FXST - FXSTI Softail...

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