Question about 1991 Suzuki GSF 400 Bandit

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Wont keep running

I have a 1991 suzuki bandit 400 3 days ago I got caught in the rain and I almost made home when the bike started to buck and sputter I pulled thinking I was out of gas.I wasnt .now it start and ideals fine but when I let the clutch out it stalls.sometimes I can get it running and even get in 2nd but I really gotta let the clutch.out slow but then it still stalls .Im thinking ignition bad .what do you think

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Could also be water in the fuel - the main jet hangs lower in the fuelbowl and would be stuck into any water before the water level got high enough to mess with the idle circut in the carb. As your accellerating it would require fuel from the main jet more and suck more water instead of gas. Clean your carbs and gastank. Check for the wiring first. lots of water could mean electricity not going where it needs to be.

Posted on May 24, 2013

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Maybe some water in an electrical plug. Remove the tank and dry it all out with compressed air or WD40. Work around the coils and other wiring. Also where the wires come out of the engine case.

Posted on Jun 16, 2009

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1 Answer

How can I tell Which Year My GSF 400K is?


Everything you want to know about the bike can be found in the VIN number (letter). In this case pay attention to the 10th digit (reading left to right). This may help too: http://www.suzukicycles.org/Bandit-series/GSF400-Bandit.shtml
Good hunting....

Jan 10, 2015 | 1991 Suzuki GSF 400 Bandit

1 Answer

1990 Suzuki GSF 400 Bandit will not idle


Hi, Anonymous check your idle circuit passages for contamination also you need to make sure you have no intake leaks by spraying some Brake Kleen, Contact Cleaner, Starting Fluid etc. around the intake manifold and seals, if the RPM's go up or down significantly then you have a leak that needs to be fixed before you can continue with the carburetor adjustment.
The engine should be at operating temperature with the choke off to set the idle between 950-1050 rpm. Turn the idle skrew clockwise to increase the idle speed and counterclockwise to decrease the idle speed. If you have access to your air-fuel mixture skrew you may turn it as well, if not there is a video below on how to gain access, make sure you start with clean or new spark plugs. Gently turn the air-fuel mixture skrew clockwise until it starts to bottom out "STOP" do not over tighten as it will damage the taper on the end, now back the skrew out 1-1/2 full turns to establish a starting point start the engine and check the idle rpm's and turn the idle skrew accordingly for 950-1050 rpm if necessary, turn the air-fuel mixture skrew 1/4 turn at a time and let the engine settle for about 10 seconds, turn the skrew clockwise for a leaner mixture and counterclockwise for a richer mixture, you are seeking the highest rpm your air-fuel mixture skrew can acquire without going past 3 full turns from bottom then resetting the idle skrew back down to 950-1050 rpm If you can not detect any rpm change and can not stall the engine by turning the air-fuel mixture skrew all the way in then your pilot/low-speed jet is too big and needs to be replaced with the next size smaller. Final adjustment should be made with a clean air filter mounted to the carburetor.
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.
http://forums.banditalley.net/suzuki-bandit-250-400/bandit-wont-idle-lags-1991-400cc
1991 gsf 400 suzuki bandit ignition and idle fixed
Suzuki GSF 400 BANDIT Service Manual
OEM parts for Suzuki
http://mybikemanuals.com/suzuki/suzuki-gs-owners-manuals

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


Oct 14, 2017 | 1991 Suzuki GSF 400 Bandit

1 Answer

1991 Suzuki GSF 400 Bandit #3 cylinder dead


Hi, Justin, you need "FIVE" things in order for a cylinder to run properly:
1. FUEL: in order to validate your not getting fuel spray some starting fluid into the air cleaner and hit the starter button, if it fires up and runs for a few seconds then you know you have a fuel delivery issue. Multi carb banks should be bench "SYNC"
2. SPARK: remove the spark plug and with it connected to the spark plug cable ground the threads to something metal you should see a bluish white spark if not you have a faulty spark plug, spark plug cable, ignition coil, condenser, CKP, ECM, sensor or the wiring in between.
3. COMPRESSION: you must have at least 80-100 PSI for most bikes, multi-cylinder engines should be within 10-15% of each other if not perform a leak down test you may have a burnt or bent valve or hole in the piston or broken rings.
4. CAM TIMING: confirm your timing marks are aligned to see if the cam chain or adjuster are worn out and the chain has skipped a couple teeth.
5. IGNITION TIMING: on older bikes check to see if your points have not closed up, timing plate has not become loose and confirm with a timing light for proper retard and advance functions, on newer bikes where timing is controlled by an ECM and is nonadjustable check you CKP, TPS, MAP, O2, sensor or its counterpart for integrity.
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.
Mysterious problem with my GSF 400
Bandit running on 3 cylinders
Suzuki GSF 400 BANDIT Service Manual
https://www.partsfish.com/page/oem-parts-for-suzuki
Suzuki GS500 Owner Manual
http://mybikemanuals.com/suzuki

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

Dec 20, 2017 | 1991 Suzuki GSF 400 Bandit

1 Answer

Suzuki GSF400 Bandit problems with tick over.


as you have replaced carbs you will need to retune for fuel intake also check its getting enough air ie.. air filter has been changed or is clogged

Jun 16, 2009 | 1992 Suzuki GSF 400 Bandit

2 Answers

Front rim for my 1991 gsf 400 bandit


No. The gs500 has rotor on right side. 600s have two rotors. The following website will let you compare part numbers. http://www.suzukipartshouse.net/pages/parts/viewbybrand/parts.aspx

May 29, 2009 | 1991 Suzuki GSF 400 Bandit

2 Answers

Will not idle


blocked carbs, get a good fuel system cleaner, if you in USA get Berrymans B12, double the dose and mix in tank. run til hot then leave to stand overnight. also if you can remove the air cleaner to get to carb intake, get spray carb cleaner an chuck a load in there. also check to see if you have a fuel filter inline

Apr 10, 2009 | 1991 Suzuki GSF 400 Bandit

1 Answer

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Feb 08, 2009 | 1991 Suzuki GSF 400 Bandit

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