20 Most Recent 2003 Suzuki GSX 750 F (Katana) Questions & Answers


Hi, James_pat284 before testing any electrical component in the Starting System it is "IMPERATIVE" that you have a fully charged battery of 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage, the battery is faulty and must be replaced. AGM type batteries fall into this scenario more so than lead-acid batteries.
1. Ignition Switch not in the "ON" position.
2. Engine Run Switch in the "OFF" position.
3. Check the 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.
4. Bank angle sensor needs a reset or is faulty.
5. FOB battery low or dead.
6. Faulty ignition switch.
7. Faulty starter button.
8. Faulty kickstand, clutch, neutral safety switch.
9. Security alarm needs a reset.
10. Starter relay, solenoid, starter motor or circuit wiring faulty.
11. Starter armature or field coils have failed.
12. Main fuse or circuit breaker may be blown or faulty.
13. Faulty ignition relay.
14. The electric starter is working but starter clutch has failed.
15. Check for engine trouble codes.
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.
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2003 Suzuki GSX... | Answered on Oct 28, 2018


Hi, Anonymous for this scenario you will need your service manual that has all fastener torque specs and a wiring diagram on the back pages, parts fiche, and owners manual if you can't find the best tool you ever bought for your Suzuki, despair not, for a mere $18 you can download another one.
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.
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2003 Suzuki GSX... | Answered on Oct 27, 2018


Hi, Rob engine "BOG" is mainly caused by a rich air and lean fuel condition but it can also be caused by a lean air and rich fuel condition this situation rarely occurs and is only caused by the misinformed weekend warrior that owns a toolbox. If the bike has been sitting for months or years you will have to completely disassemble the carburetor and submerge the parts (except rubber parts) in "Carburetor Dip" It usually comes in a gallon bucket with a wire mesh basket that can be purchased at any automotive store. If it is not the above scenario then the following explanation will apply.
The more you open your throttle the more vacuum you are creating in your carburetor venturi and your intake manifold. When you are operating at higher RPM any unmetered air that leaks into your system can become more obvious.
Unmetered air is air that is getting into your system after the fuel has been delivered. If you have unmetered air getting into your system between the butterfly/slide of the carburetor and the cylinder head this will create a lean condition.
All of the rubber components of the fuel system like vacuum hoses and intake manifold that you mount the carburetor to are made of rubber. If none of these components have been changed they are more than likely highly degraded and probably cracked in places to allow unwanted-unmetered-contaminated air into the combustion chamber. Check all of your vacuum lines and vacuum plugs for carburetor synchronization. The vacuum plugs are in the head just after the rubber intake manifolds. The petcock has a vacuum line as well as part of the emission system.
1. Check the intake manifold for fissures.
2. Ensure the bands used to tighten the manifolds down on the intake are secure and have not bound up the manifold.
3. Make sure air box fittings are not warped and fit completely over the carburetor.
4. For 2 strokes make sure the power valve is adjusted properly.
Your airbox is metering air and is the first step in a process of consuming air and fuel. The system requires the resistance of the air filter in order to get the proper vacuum to "SUCK" the fuel out of the float bowl and create the proper venturi effect.
Improper mounting and sealing of the airbox will create a small lean effect. This might seem like no big deal but you are inviting dust and debris in your engine that is doing slow damage by not having proper fitment. Fix it so you know it's not contributing to your issue. Pick the low-hanging fruit first.
Do not go and start adjusting anything at this point. It ran fine before. There is something wrong with the assembly or a component. Do not adjust your floats. Get it back to where it was. The moment you start tweaking everything is the moment you lose OEM settings which are a must-have for fine-tuning and maximum performance.
Fine-tuning your carburetor and multi carb syncing come at the very end following the proper procedure established by the Carburetor Gods.
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.
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2003 Suzuki GSX... | Answered on Oct 27, 2018


Hi, Charleston for this scenario you will need your service manual that has all fastener torque specs and a wiring diagram on the back pages, parts fiche, and owners manual if you can't find the best tool you ever bought for your Suzuki, despair not, for a mere $18 you can download another one.
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.
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2003 Suzuki GSX... | Answered on Oct 25, 2018


Hi, Evan and the usual suspects are:
1. Severely discharged or a damaged battery must have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead acid batteries.
2. Faulty alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Faulty main circuit breaker or ignition switch, check for loose connections and continuity.
5. Faulty system and or ignition relay, check for continuity.
6. Faulty ignition coil, ignition/electronic module.
7. Faulty CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Faulty neutral, side stand or clutch lever safety switch.
10. Fuel tank empty
11. Fuel tank contaminated with ethanol sludge.
12. Water or dirt in the fuel system, or clogged filter.
13. Restricted, blocked or kinked fuel line.
14. Faulty fuel pump.
15. Faulty pressure regulator.
16. Faulty or clogged fuel injectors.
17. Lean angle switch is faulty or needs adjustment.
For more information about your issue and valuable "FREE" downloads that you need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
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2003 Suzuki GSX... | Answered on Aug 16, 2017


The three (usually yellow) wires from the alternator can hook to any of the three large wires from the regulator.

2003 Suzuki GSX... | Answered on May 14, 2014


your speedo wire is loose.fit it at the wheel.tight it.

2003 Suzuki GSX... | Answered on Jun 18, 2011


Hello and welcome to FixYa!

Yes there can be expired fuel on the bowl. You may want to clean it thoroughly as a first course of action. Please do check and replace the spark plugs and plug wires too for they can be worn out which may cause irregularities on current supply.

If the problem still persists, please do check the vacuum lines too. If you have disconnected or worn out vacuum hoses you'll have vacuum leakage. If that's the case, please have it replaced to resolve the issue. Wish you all the best on this and hope to get your bike back to it's normal running operation.

Hope this helps and thank you for using FixYa! Have a good one!

2003 Suzuki GSX... | Answered on May 31, 2011


check your charging systems. your reg/rec may be bad or you stator. when you start your bike you should get 12.5 or so when reved should get 13.5 to 14.5
Mark

2003 Suzuki GSX... | Answered on Jun 07, 2010


Hello make sure you have gas in the tank you may be low.
try this unless you already have. turn you fuel valve to primary and try again to star the bike.
the other problem that happens is the fuel **** vacuum diaphragm may have a gone bad that is located in the body of the fuel petcock to check it unhook one of the fuel lines and replace it with a length of hose to a container to catch ant fuel then crank the engine it should flow is it does not remove the petcock and get a replacement diaphragm sizuki doe's not have it available but K & L has them available. hope this helps

2003 Suzuki GSX... | Answered on May 11, 2010


by adjusting the air mixture screws turning them out by quaurter turn at a time on the carbs but before you do that check to make sure your air filter isnt clogged because that can cause the same problem as well as poor fuel consumption
hope this helps

2003 Suzuki GSX... | Answered on May 08, 2010


hi,this might help,it is very difficult to get the adjustments right without a set of carb balance gauges,the adjustments are very small and critical to the running of the bike,borrow or buy a set of gauges,hook up the gauges,balance the left two cylinders together so they are both running exactly the same,then do the two right cylinders and get them both running the same,then match the two sets  together using the balance screw between no2 and no3 cylinders,a general rule of thumb to get a startng point is to wind the mixture screws in untill they stop,then back them out about 1.5 turns,do the same to all four screws before you start trying to balance the carbs,make sure the bike is sitting vertical or on the centre stand because if it is not it will effect the balance of the carbs and also make sure you have a good airflow over the front of the motor for cooling as it will take half to three quarter of an hour to get the balance right...most bikes need the carbs rebalanced on a regular basis because when the parts of the carbs start to wear the balance will change,a good set of carb balance gauges is a worthwhile investment...hope this helps

2003 Suzuki GSX... | Answered on Sep 12, 2009


2 and 3/4 turn from all the way in on th fuel screws..

2003 Suzuki GSX... | Answered on Aug 30, 2009


hi mate adjust the needle in the carb on the piston there is a little clip and there are 5 slots or less move it to the correct one in the manual 3 slot from top etc also adjust the mixture screw on the carb it will say the amount of turns in the manual e.g 2 1/2 turns out so screw it right in till its tight and undo it so many times

2003 Suzuki GSX... | Answered on Jul 10, 2009


Hi, Anonymous for this scenario you will need your service manual that has all fastener torque specs and a wiring diagram on the back pages, parts fiche, and owners manual if you can't find the best tool you ever bought for your Suzuki, despair not, for a mere zero $0 you can download another one.
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.
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Suzuki GSX 750 F... | Answered on Oct 28, 2018


Does this motorcycle have a radiator if so, make sure it's full if it is go online and see if there's a sensor that shuts the bike down when it gets too hot. Maybe there's something wrong with that

Suzuki GSX 750 F... | Answered on Dec 20, 2017


compresion tsest could be a slightly bent valve, or valve too tight, inlet side.

Suzuki GSX 750 F... | Answered on Nov 06, 2017

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