Question about 1997 Suzuki GSF 1200 Bandit S

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Vibrating footpegs worst at 70 80mph dont feel at any other time. bike done 15000 but is well looked after. have driven bikes all life from bultaco to ducati.

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Sounds like you found your sweet spot. Most bikes have vibes at certain rpms. Try shifting down a gear and see if it is still there. If not, you know it is rpm related, and if so, it would most likely be tire balance chassis related. Make sure the rubber mounts for your pegs are in good shape also.

Posted on Jul 13, 2009

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Posted on Jan 02, 2017

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indicates problem floats or needle and seats
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Very bad buzzy type vibration coming through the bars and footpegs which starts at 5500 and ends at 7000 rpm. Throughout the rest of the rev range the bike is as smooth a silk. There is no vibration on...


Hi, Cook_a911and the usual suspects are:
1. Wheels and or tires worn or damaged.
2. Engine/transmission/vehicle not aligned properly.
3. Primary chain is badly worn or links too tight as a result of insufficient lubrication or misalignment.
4. Engine to transmission mounting bolts loose.
5. Upper engine mounting bracket loose.
6. Ignition timing incorrect due to a poorly tuned engine.
7. Internal engine problem flywheels have shifted.
8. Broken frame.
9. Stabilizer links worn or loose.
10. Rubber mounts loose or worn.
11. Rear fork pivot shaft nuts loose.
12. Front engine mounting bolts loose.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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Bultaco 350 trails bike , bike seems to be running very hot and pinking when under load with modern fuel can you tell me is it wise to use fuel additives with a pre mix fuel? also the modern fuel is...


First, you're mixing the oil to the manufacturer's specification, right? No matter what it says on the oil bottle, mix it how Bultaco intended or it will, indeed, run hot. Until the piston galls..

You're much better off to buy high-octane fuel than to try to improve poor fuel with additives. Poor fuel is poor and that's all there is to it and, in my opinion, there is some pretty poor fuel being sold today. You might have to get into the dyed, off-road only fuels to find something this bike likes, a two-stroke that's running on the pipe can hit impressive pressures in the combustion chamber, so quality fuel is in order.

How does the spark plug look? It should be clean and the color of wheat bread toast. White, ashy, scalded-looking, blistered, chipped/cracked are all indications of too hot of a plug, lean fuel mixture, ignition timing too advanced.

Exhaust blockage is the last thing I'll mention. Ensure there is no restriction in the exhaust. If you can pull the muffler out of the end of the pipe, do so and see if it's still getting hot.

Go through this, get back with me on the 'comments', we'll get you going.

lp

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1 Answer

I met with an acidenet and the fork got misaligned. The realignment was done by the mechanic . I am facing a very serious problem that the whenever the i ride a bike it bumps too mcuh even on straight bump...


Coiled springs do not aid with damping which seems to be your problem. The springs are there so that you dont feel every bump in the roead. It makes your ride more comfortable. The wheel is now bouncing up and down because there is nothing to prevent it from doing that(done by a shock absorber/damper) This damper is contained within the fork(Lower part together with the springs). One on each side. Some bikes use air, larger bikes use oil or a combination of oil and compressed air. Not sure about yours.
Therefore it seems to me that the seals have failed. It could also be that the unit was assembled incorrectly. An auto spares shop should be able to supply you with the correct seals if you take the old ones as a sample. Take note of the position and also the direction a seal was installed when removing.

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this new exhaust has thrown the engine way out of tune, and the carbs need to be re-set up as the bike is now running very week,,,,you will burn a hole in a piston very soon if you dont re-tune it,,,this could also be causing some if not all of the vibration your getting, but check the sprokets are running true life the rear of the bike clear of the ground and spin the rear wheel if you feel or here a grinding sound its the sprokets not meshing with the chain also did you have the new tyer balanced when it was fitted???
this also causes vibration

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1 Answer

Suzuki VS1400 Boulevard Vibration Problems


Try to check all the bolts tht holds the engine to the frame they could be lose.
I had a similar case and only to find tht the engine mounting bolts were lose the bike was Bultaco 125 sherpa.
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1 Answer

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Hello cloaky...does the vibration seem to be more RPM related than speed related on your gixxer? Can it be felt more through the grips, or foot pegs? Any noise along with the vibration?
The 99 GSX-R600 has been subject to recall for the replacement of it's faulty cam chain tensioner (NHTSA CAMPAIGN ID Number: 99V132000) Dealer supplied and installed at no charge under warranty... corrected the problem of cam chain tension but the damage of shorten chain life for most owners, had already occured. Didn't know if you were aware of this...so i thought i would mention it.
Hope this helps...

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2 Answers

Engine vibration at 1800-rpm and up 1340 evo 1994 dyna.


Hi .... This may sound daft but have you recently changed or had the exhaust off ? Have a look at the silencer/muffler rear mounts, difficult to explain but they should be in a 'neutral' position, not fully pushed in. Maybe the vibes are coming straight along the pipes from the engine and through the footpegs.
Let me know how you get on.

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