Question about 1991 Honda ST 1100 Pan European

1 Answer

Flat spot /backfire

2002 ST1100. 43000 miles.back fired a few times when decelerating and has now developed a flat spot an first opening of throttle. over 2000rpm is normal

Posted by on

  • Andrew Harman Jan 20, 2009

    I have a 2000 ST1100Y and I get a small misfire when cruising for about 5 minutes at about 2500 rpm in 5th gear on the open road, I have cleaned the carbs, replaced all the plugs and HT leads but still it is there, even the local Honda dealer is not sure what it could be all they can suggest is for them to replace half the electrices in the hope it finds the problem but i done have a bottomless pit of money, Any other Idea's !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

×

Ad

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.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 6,966 Answers

Hi and welcome to FixYa,

Initially, pls check the airbox, air cleaner and how the assembly is fitted. Backfire on deceleration indicates lean mixture (too much air, too little fuel). A flatspot could be anything, let's try the air cleaner/box first and proceed from there. Might get lucky to solve both problems with 1 solution.

A favor, I would rather that you please do not rate this solution (yet) not unless it solves the problem. Due to my current rank and rating, even a Helpful would be detrimental to my standing.

Good luck and Thank you for using FixYa. Happy Holidays.

Posted on Dec 18, 2008

Ad

1 Suggested Answer

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 there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

2 Answers

Back fires rich exhaust


Preventing Backfire on Motorcycle Exhausts ' DoItYourself ...

www.doityourself.com/.../5-tips-to-preventing-backfire-on-motorcycle-e...
When the engine on your motorcycle has an emission system malfunction, such as anexhaust leak or a moment of running rich or running lean, backfire can ...

Exhaust backfire, popping when letting off throttle - Motorcycle Forum

www.motorcycleforum.com > ... > General Motorcycle Discussion

Apr 26, 2009 - 28 posts - ‎17 authors
Exhaust backfire, popping when letting off throttle General Motorcycle Discussion. ...You can damage the engine by running too lean or rich. Backfires on deceleration
21 posts
Jan 24, 2015
What causes a bike to back fire?
8 posts
Jul 15, 2012
At my wits end! Backfiring and fouled plugs on ...
13 posts
Feb 26, 2011
More results from www.motorcycleforum.com

Glad That You Asked. Why Do motorcycles Backfire? at Cyril ...

cyrilhuzeblog.com/.../glad-that-you-asked-why-do-motorcycles-backfire...
Jun 12, 2010 - A visible flame may momentarily shoot out of the exhaust pipe. ...Another backfire situation occurs when the engine is running rich, meaning ...

Is backfire when decelerating a bad thing? : motorcycles


Jan 31, 2016 | Motorcycles

1 Answer

Why are tires that have flat spots from sitting over a year not safe to drive on?


Any imperfections or flat spots will be worked out after you drive a few miles to get some heat into them. Some tires even develop flat spots overnight. It's normal for pretty much all tires...Keep driving on them, may take 500 miles of easy driving...It may make you nuts listening to the noise until they round out after some driving...saailer

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

Jul 11, 2014 | 2003 Toyota Corolla

1 Answer

What causes the 22re to pop and backfire when trying to accelerate?


Check and adjust ignition timing first. Next if you have an overhead cam check the valve timing as it may be out a tooth

Jan 27, 2013 | Cars & Trucks

1 Answer

My 1999 Honda shadow backfires on deceleration after steady throttle what could cause this? I have tuned it and cleaned the carb but it still does it.


The most common reason for backfiring is lack of back pressure from changing the exhaust. To compensate for the flat spot you get you put in a jet kit. This leaves the possibility of more unburned gas getting into the exhaust. Honda uses Kei Hin carbs with a fuel shut off diaphragm to help limit this condition (backfiring) by turning off the fuel to the carbs during deceleration. Even stock exhaust can pop or backfire. Typically it is caused by air getting into the exhaust either past the copper o-ring gaskets in the head or leaking muffler connections from the head pipes to the mufflers. Try replacing all the exhaust gaskets and you should minimize this condition.

Sep 05, 2010 | 1999 Honda VT 750 CD Shadow A.C.E. Deluxe

1 Answer

2002 Isuzu Axiom motor backfiring runs rough put new front O2


common causes for back firing, low fuel pressure, or restricted injectors, breakdown of secondary ignition coil, internal ignition coil arching, or a dead spot in throttle position sensor.

Jul 20, 2010 | 2002 Isuzu Axiom

1 Answer

2002 Honda VT 750 C2 Shadow backfires on deceleration


Hi, Mmme3331 if your carburetor or exhaust is:
COUGHING is usually caused by an air leak in the intake system and will generally have the same telltale signs, a wet or damp build up of oil/gas seepage at the intake manifold to cylinder head or carburetor to intake manifold connection and in rare instances a worn throttle plate shaft and or seals.
POPPING on deceleration is usually caused by a lean fuel condition or an air leak in the exhaust system and is generally located where black carbon soot is seen as a flashing build up from any joint connection. This condition can easily be remedied by removing and cleaning both joint pieces and reassembling with high temp silicone and torquing the exhaust clamp to the proper spec.
SPITTING is usually caused by a faulty accelerator pump and or nozzle, or the float bowl needle and seat leaking and overflowing through the main jet mixing well nozzle, or the air-fuel mixture screw is adjusted too lean.
BACKFIRING is usually caused by a sticky/tight intake valve or a timing issue, 180 degrees out or cam chain off 1or 2 teeth.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
Deceleration exhaust pop backfire
Honda shadow exhaust leak backfiring fix
Honda 1998 VT750C Service Manual
https://www.partsfish.com/page/oem-parts-for-honda
Honda VT750C Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


Apr 20, 2010 | 2002 Honda VT 750 C2 Shadow

1 Answer

1992 f150 back firing throu intake when cracking throttle breifly-soundslike only one cylinder backfire. stock engine-5.8lw(efi) with headers and roller cam, engine recently rebuilt


backfire is the igniting of fuel in the intake. Can be, timing, valves not adjusted right, cam worn flat on one lobe are usually the first places to look.
check it out.

Apr 15, 2010 | 1999 GMC Jimmy

1 Answer

I have a 94 nsr 125, it has a good spark, fuel is getting through fine, it will back fire and cough with a bump start but just wont run.


It's hard to say "this is it" without more info such as when did the problem start happening? Did it just happen out of the blue one day where you went out to start it and it wouldn't start? Did it happen after changing spark plugs? Were there any issues/symptoms the last time it was running and you rode it?

If you changed plugs, check the plug wires. They may be on the wrong plugs which mixes up the firing order and would definitely cause what you are seeing. If it just started happening out of the blue, were there symptoms of hesitation the last time you rode it? Any flat spots in the acceleration when you twisted the throttle? Did it bog at any point in the RPM range or backfire when you let off the gas? The backfire and cough are usually related to timing issues but you should have seen symptoms the last time you rode it if the timing started to get whacked.

Nov 30, 2009 | 1994 Suzuki RF 600 R

1 Answer

Xerox phaser 4500 printer clicks while printing


The clicking noise is created by flat spots on the fuser rollers. The flat spots on the rollers create a ?chatter? in the fuser gear drive train. This noise does not affect the performance of the printer and does not affect print quality.

All new fusers are shipped with restraints that keep the rollers separated during storage. If the fusers sit without the restraints installed for a period of time, flat spots can develop on the rollers which can result in a ?thumping? noise and will create a ?clicking? noise in the fuser gear drive train.

If a printer sits idle for long periods of time, flat spots can develop. If Power Saver is disabled and the printer sits idle for long periods of time while powered on, the flat spots will develop at an accelerated rate.
The clicking noise is created by flat spots on the fuser rollers. The flat spots on the rollers create a ?chatter? in the fuser gear drive train. This noise does not affect the performance of the printer and does not affect print quality.To decrease the possibility of flat spots developing, set Power Saver to On with a Power Saver Timeout of 30 minutes

To decrease the possibility of flat spots developing, set Power Saver to On with a Power Saver Timeout of 30 minutes.
If a printer or fuser is not going to be used for an extended period of time or will be placed in storage for future use, re-insert the fuser restraints. The fuser restraints can be in place and the fuser installed in the printer

Nov 20, 2007 | Xerox Phaser 4500/YDX Printer

Not finding what you are looking for?
1991 Honda ST 1100 Pan European Logo

Related Topics:

356 people viewed this question

Ask a Question

Usually answered in minutes!

Top Honda Experts

Arnie Burke
Arnie Burke

Level 3 Expert

5644 Answers

Marvin
Marvin

Level 3 Expert

83810 Answers

Steve Banks

Level 2 Expert

232 Answers

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

Answer questions

Manuals & User Guides

Loading...