Question about Harley Davidson FXR Super Glide Motorcycles

1 Answer

I have a 91 FXR that was professionally rebuilt. I added straight pipes to the bike and now it runs terrible. I'm using an E carb, does anyone know if there's problems with this combo?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Renaissance:

    An user who is expert in 3 categories / brands.

  • Harley Davidson Master
  • 1,554 Answers

Yes, there is!
It's called STRAIGHT PIPES!
Straight pipes never run right, except at wide open throttle on the track.
Beings you're running a (S&S) E carb, read item number 10, here:
http://www.sscycle.com/carbquickguide/
It says, "NOTE: Drag or straight pipes can prevent you from obtaining optimum carburetor performance."
You didn't say if you were running the standard S&S air cleaner or not, but line 11 states" If the S&S teardrop air cleaner is being replaced with an aftermarket air cleaner be sure to remove the auxiliary bowl vent screw. Never use a velocity stack on a street driven motorcycle! Poor throttle response will be experienced."

Posted on Aug 02, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

robotek
  • 1512 Answers

SOURCE: floats not moving on my honda vt250fd

Hi Chris,

You can download the service manual for nix from here. trying to picture what you are looking at, but if they are the only rubber hoses coming off the carby, then they are most probably the fuel lines. If they come off the very top of the carby, then they may be breathers. The bike has a vacuum operated petcock also, you will need to have it in prime position for the carbs to fill. Then once the engine runs, if the petcock os working correctly, then you should be able to get fuel in on position. Just cranking it over will not created enough vacuum for the carbies to fill.,hence the prime setting. Happy to answer any questions you may have about the bike, A FixYa rating is a great reward for my efforts to assist you. Cheers

regards
robotek

Posted on Nov 13, 2008

  • 13 Answers

SOURCE: 91 kx 250 stock carb setup.

Low speed screw 1.5 turns out from bottomed. Middle position for clip #3 position.
I never rely on the factory settings for the low speed screww, set it to factory and keep adjusting it 1/8 turn at a time until idle sounds best and quick throttle blips dont sound "stumbly" the later being the most important.

The needle position is for low altitude.

Posted on Jan 26, 2009

  • 53 Answers

SOURCE: rebuilt carbs-starts and idles but wont rev up without choke on

sounds like the main jets are partly pluged, you must remve all brass jets and seats including needle jet and its slide soak in carb cleaner and blow out with compressed air only.. hold up to bright light to verify if all are clean. jim

Posted on Mar 29, 2009

Benimur
  • 6966 Answers

SOURCE: 1979 suski 750,bike runs on 2 left side cylinders,

Hi and welcome to FixYa,

With the indulgence of craigjamesbt...

A few additional ideas to consider:

  • it would be an electrical/ignition issue if 1 & 4 or 2 & 3 will not fire but not 3 & 4;
  • almost always, raw fuel on exhaust indicates a flooded engine. A flooded engine would most likely be a carb issue;
  • best way to determine if it is an engine concern is to do a compression test;
  • a way to test the right carb pair is to deliberately starve them of fuel by temporarily plugging/blocking the inlet port/seat with rubber similar in appearance as to those used for glue gun, not installing the needle and float. Assemble the carb and install. Start the bike and use/spray carb cleaner on the right side carb. Note if 3 & 4 will fire even intermittently.
Would appreciate a postback on results/updates on any developments.

Good luck and thank you for using FixYa.

Posted on Apr 27, 2009

scott_77
  • 48 Answers

SOURCE: suzuki rmz450 is stalling when clutch is let out.

Carb may need tuning

Posted on Apr 30, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

I recently had my carbs cleaned and adjusted.Bike ran fine for two days.Then one morning i had trouble keeping on,it turned on but would turn off even with choke and reving it. the next day bike wouldnt...


I NOW THE FEELING HAVE SCOOTER THAT HAS NOT BEEN RUNNING SENCE 2007 GOT BAD GAS HAD TO HAVE ENGINE COMPLETLY REBUILT. THEN WE MOVED AND HAVEN'T HAD MONEY TO GET IT LICSEND AS OF YET.

Feb 03, 2015 | 2001 Suzuki GSX 600 F (Katana)

2 Answers

What is causing steam from my exhaust pipe and bike won't stay running?


It's probably dirt in the carbs and the steam is the un burnt fuel from a stuck needle valve in the carb

Oct 05, 2014 | Honda NSR 250 MC 21 Motorcycles

1 Answer

Loud pop


Hi Anonymous, I do not know what year your bike is but if you running Dyna Ignition with a mechanicall advane check it for worn parts,if the rheinhart pipes did not come with reversion cones give them a call and get their feedback on installing a pair. Other than you might want to consider going up one size on the mid range and main jets. Good luck

Apr 10, 2014 | Harley Davidson FXDL Dyna Low Rider...

1 Answer

I just want to know how to take the carb off and clean it


You have fuel injection --No Carb

Against Federal Law to remove the Exhaust Converter
Need the converter for the oxygen sensor to control fuel

Feb 24, 2014 | 1991 Cadillac DeVille

1 Answer

1982 honda CB900C carbs re-jetted and straight pipes with volkswagon baffles for backpressure won't idle ect..


hiya sounds like your float in the leaking carb is sticking. this will cause the problems you have. check and clean float system in carb, check for leaking float too.

Mar 06, 2013 | Motorcycles

1 Answer

Have a1983 gs450L suzuki for a winter project. I got it to start after sitting for years. Took off mufflers and added straight pipes and put on airfilter pods plus went from 130 main jet to 140. Bike wont...


Go back to the 130 main jet. Be sure to check that both carb slides lift at the same moment. Also check to see if one carb is "driving" the other due to the idle screws not being balanced. Check the compression in both cylinders. It should be within 10% of each other. It is not likely that the bike has jumped time.

Sep 28, 2011 | 1983 Suzuki Gs 550 L

1 Answer

The previous owner had the carbs jetted I don't know what size he added or whatever. But everything else is stock. The problem I'm having is the bike runs really bad and the fumes are bad when idling but...


Hi there,

The jets are for increased performance but the jets installed must be in relation to the pipe used. An open pipe would require larger jets. If the jets came with the pipe when the previous owner purchased it, then it should work. My advise would be to tune it up, sync the carbs, and time the sparks.

If all else fail, ask the previous owner to provide the stock jets and replace it. Stock jets along with the stock pipe will almost always run the first time. Sync the carbs and tune timing. If you have it all running smooth, from there you can do upgrades like stage 1 jet kit or purchase a performance exhaust.

Please do let me know if any of this was helpful,
I'll follow it up should my suggestions fail,

Dec 19, 2010 | 2001 Yamaha YZF-R1

1 Answer

Bike backfires,dies,restarts runs fine


your carbs are dirty. and probably need to be balanced also... bring the bike bto a garage and have them cleaned by a profesional.... also after market pipes don't give your bike the proper back pressure .. that can mess up your carbs timing

Jun 16, 2009 | 1996 kawasaki VN 1500 Vulcan Classic

1 Answer

Carburator adjusting or no gas


Hi and welcome to FixYa,

Initially, if there is spark on the plug of the front cylinder, then it would be a fuel issue. Pls try:
  • Rig a fuel bottle to replace the fuel tank;
  • Remove the airbox assembly to expose the carb;
  • Start/run the bike, spray carb cleaner on the open carb;
  • note the RPM or sound of engine. Determine if front cylinder will fire even erratically. You could also try the exhaust pipe if it warms up (pls be careful might be overly hot);
  • rev the bike then cover the carb mouth of the front cylinder with the palm of your hand;
  • there should be a strong suction indicating that vacuum is created when on the intake stroke and intake valves are opening;
  • the palm of your hand should be wet with fuel, if not carb issue;
  • might require a rebuilt.
Good luck and Thank you for using FixYa. Happy New Year.

Jan 01, 2009 | 1986 Honda VT 500 C Shadow

Not finding what you are looking for?
Motorcycles Logo

Related Topics:

97 people viewed this question

Ask a Question

Usually answered in minutes!

Top Harley Davidson Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4514 Answers

Gills Lango

Level 2 Expert

195 Answers

Mike

Level 3 Expert

4336 Answers

Are you a Harley Davidson Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...