20 Most Recent 2001 Suzuki GSF 1200 Bandit S Questions & Answers


Hi, Antonio 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 the 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.
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.
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2001 Suzuki GSF... | Answered on Apr 27, 2019


Hi, Anonymous for this scenario you will need your service manual, 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.
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2001 Suzuki GSF... | Answered on Apr 24, 2019


Hi, Sam for this scenario you will need your service manual, 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.
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2001 Suzuki GSF... | Answered on Apr 11, 2019


Hi, Anonymous if some or all of your instrument cluster goes dark/blank immediately upon startup or a few minutes later riding down the road the usual suspects are:
1. Blown instrument fuse.
2. A bad ground in the instrument circuit.
3. Faulty wiring before or after the fuse.
4. Faulty wiring or connector between the fuse and the instrument cluster.
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2001 Suzuki GSF... | Answered on Mar 14, 2019


Hi, Lee and the usual suspects are:
1. Insufficient oil level or no oil in engine or tank.
2. Air in oil system that needs to be bled.
3. Blockage in the oil tank or line.
4. Oil pump failure.
5. Faulty oil pressure sending unit.
6. Grounded oil pressure light circuit.
7. Oil maintenance light needs to be reset.
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2001 Suzuki GSF... | Answered on Nov 05, 2018


Hi, T 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.
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2001 Suzuki GSF... | Answered on Oct 09, 2018


Hi, Perglory 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.
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2001 Suzuki GSF... | Answered on Oct 09, 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 zero $0 you can download another one.
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2001 Suzuki GSF... | Answered on Oct 09, 2018


Hi, Stephen usually 0.125" 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.
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2001 Suzuki GSF... | Answered on Oct 08, 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 zero $0 you can download another one.
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2001 Suzuki GSF... | Answered on Oct 08, 2018


Hi, Anonymous you're getting ready to go riding you pull out the dipstick to check your oil level and are greeted with the unmistakable smell of gasoline. What happens next depends on the following:
1. You have experienced this before and do not start the engine but do change your oil and filter leaving it 1 quart low until the engine reaches operating temperature then top off as necessary.
2. The amount of time your bike has been sitting, since the last time the engine was running.
3. The amount of gas and contaminants in the tank.
4. The oil pump location, exterior or interior.
5. The condition of your petcock gasket/seal/diaphragm.
If your gas tank was low and you start the engine probably nothing you would notice but if your gas tank was full and you start your engine the oil/gas mixture can blow into your air filter, come streaming out of your crankcase breather hose, and launch your oil tank cap followed by a blast of oil. The mess can be minor or you need to call a Hazmat team for assistance. This will also happen if you overfill your oil tank.
Next is the how and why gas can get into your oil tank/system:
a. The vacuum petcock rubber/diaphragm fails, which allows gas to flow from the fuel tank through the petcock, through the vacuum line into the intake manifold, then into the combustion chamber, where it seeps past the piston rings and into the bottom end.
3. Non-vacuum petcocks that are not turned to the off position will patiently wait until contaminants from the gas tank build up in between the carburetor needle and seat breaking the seal thus inviting gas to enter the combustion chamber eventually finding it's way into the bottom end and the oil tank.
4. Bottom line if you're not going to ride your bike for a while turn off the petcock.
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2001 Suzuki GSF... | Answered on Oct 08, 2018


Hi, Des and the usual suspects are:
1. Severely discharged or a damaged battery should 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. Failed 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. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, stator, magneto, ignition/electronic module.
7. Failed 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. Faulty or corroded kill switch.
11. Accelerator pump damaged or not working.
12. Water or dirt in the fuel system, carburetor or filter.
13. Restricted, blocked or kinked fuel line.
14. Fuel tank empty.
15. The gas cap is not venting properly or fuel tank venting system blocked, loosen gas cap and go for a test ride.
16. A failed fuel pump, pressure regulator and or fuel injectors.
17. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
18. Needle and seat stuck closed in the float bowl.
19. Petcock clogged or damaged.
20. Lean angle switch is faulty or needs adjustment.
21. Catastrophic engine failure, perform a compression test.
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2001 Suzuki GSF... | Answered on Aug 28, 2018


Hi, Tom for this scenario you will need your service manual, 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.
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2001 Suzuki GSF... | Answered on Feb 17, 2018


Hi, Ricky and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery should 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.
3. 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.
4. Loose connection at ignition coil or plug between ignition sensor and module.
5. Spark plug cables in bad condition, shorting/leaking, spark plug cable connections loose check for spark leakage in the dark.
6. Faulty ignition coil or electronic control module.
7. Faulty pulse coil.
8. Faulty CKP, CMP, or BAS sensor.
9. Faulty ignition switch.
10. Tilt sensor needs a reset.
11. Security alarm failing to disarm needs reset
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2001 Suzuki GSF... | Answered on Sep 30, 2017


Hi, Anonymous I would love to help you with your engine or chassis noise but I just loaned my brand new pair of listening ears to your local dealer's chief technician so he could take your bike for a test ride and give you his professional opinion and estimate about your noise and repair cost. If you are a little short on "DRACHMA" and a Dealership is not on your list of fun places to visit then perhaps the list below will help soothe your worried mind so you can make an informed decision.
1. Bearings---SCREECH
2. Belts---CHIRP
3. Brake Rotors---BUZZ
4. Rear Chains---RATTLE
5. Cam Chains---CLICKIT
6. Clutches---CHATTER
7. Cylinders---PING
8. Fairing Panels---WHISTLE
9. Fronk Forks---Plunk
10. Gears---WHINE
11. Head Gasket---HISS
12. Hydraulic Lifters---TAP
13. Pistons---SLAP
14. Radiators---GURGLE
15. Rear Chains---RATTLE
16. Rear Shocks---SQUEAK
17. Relays---CLICK&BUZZ
18. Shaft Drives---WHIRR
19. Shifting Trans---CLUNK
20. Solid Lifters---TICK
21. Starters---CLICK
22. Connecting Rods Go---KNOCK-KNOCK---who's there, it's me "*****"
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2001 Suzuki GSF... | Answered on Aug 07, 2017


Your engine is seized! Sounds like an oil pump issue or not enough oil. If you can't turn the engine in top gear, clutch out, it is definitely a seizure. Full engine strip down to fix and see if it is the cams, pistons or big end bearings.

Try removing all the plugs and see if you can turn the engine in top gear, pushing?

Let me know by COMMENT under my post.

2001 Suzuki GSF... | Answered on Mar 16, 2017


Hi Richard, for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix or parts inquiry. If necessary transport your vehicle to the dealer or shop and have a professional technician take it for a test drive, if it is in running condition, and give you a written estimate of repairs and answer any specific questions you may have about your issue. Good luck and have a nice day.
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2001 Suzuki GSF... | Answered on Oct 05, 2015


Not being a Mechanic, just what I see as commonsense, replacing ONLY the valve seals without checking for wear in the guides will be a waste of time & money, as the head will already be off the motor, probably also consider re-seating the valves as they need to be out to check the guide wear.---Much the same for rings---If the top ring is worn the others will likley be the same and unmatched rings may cause more problems down the line---for the rings to be checked/replaced, the piston will be out, so check the bore for lip & wear/ovality---specialist tools and a manual will be handy----local library/google may help here.Chains can be measured/checked too---a manual may clarify. I would expect a chain to have some form of automatic tensioner that generally eliminates at least minor wear, which should be quite low (I would think on this mileage---if oil/filter changed as per manual).

2001 Suzuki GSF... | Answered on Jan 01, 2013


No i would not expect it to, if anything blocking the vent hose to the gas tank would cause a vacuum and stoping fuel from flowing as easy , most likely a faulty fuel pump diaphram or incorrect float height.

2001 Suzuki GSF... | Answered on Feb 23, 2012


sounds like maybe broke a ring or it's stuck. Old school fix for stuck rings is to fill cylinders with Marvels Mystery Oil, leave alone for a couple days, drain and try it.

2001 Suzuki GSF... | Answered on May 13, 2011

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