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My Suzuki GSX750f has an acceleration lag around 7000rpm, after that I have to back off a bit and feather the throttle, but it will not accelerate much past that. Recently serviced by main dealer. has any one out there had the same problem and how was it fixed? any ideas

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Posted on Jan 02, 2017

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SOURCE: clunking noise w/ acceleration

Ya know it sounds like one of the U-Jonts in the front drive line to the front wheels has failed or even one of the driveline U- joints is either Dry and lost its bearings and is worn out,
One of the easiest ways to make sure its not the engine is while driving down a hill put the car in neutral, turn off the engine coast down a small hill and turn to either direction and see if you still hear it , if you still hear it its gonna be somewhere in the drive lines, becareful you will not have power steering or power brakes with the engine off, but you can restart the engine inn neutral at any time . Please let me know.

Posted on Aug 25, 2008

  • 2712 Answers

SOURCE: rough acceleration…

Power Commander will not fix your problem. You have a problem that Ducati knows about but will not post any recalls or dealer notices. My Monster 800 Sie with 6500 miles on it had the same identical problem which one dealer could not find the answer to. The second with a more experienced mechanic and bigger shop has seen this problem many times before, mostly on 1000's. Problem is a cough through the air cleaner and missfiring between 2-4k on tach, mostly worse at constant throttle. Check your valve guides! After having a rough time tuning the bike they went right to the guides and found upper cylinder valve guides shot. Also, anyone reading this, please go online to Ducati and complain about the problem. I have had so much trouble getting this bike diagnosed and repaired that I feel I am an expert now. Do not buy anything for it until they diagnose the engine then check guides!!!

Posted on Nov 20, 2008

  • 39 Answers

SOURCE: Won't accelerate past 40 miles per hour

these jeeps did have a small problem with the tp sensor. i would also have the back pressure of the exhaust checked to see if you have a catalytic converter choked up.

Posted on Nov 30, 2008

  • 9 Answers


It does sound like an ignition timing problem, but could also be a breathing issue, air flow in or exhaust flow out could be restricted i.e.:dirty air filter, excessive carbon build up in exhaust pipe from burning too much oil or rich fuel mixture.
possibly and more likely some junk got into your fuel system and partially plugged up the main jet in the carb, -or has the needle on the slide been moved? The little circlip at the top of the needle, if it has one.
1.Replace the spark plug, check gap, check spark, it should be bright blue and fat.
2. check the fuel filter, if no filter check the carb for dirt.

Posted on Jan 20, 2009

  • 137 Answers

SOURCE: poor running suzuki gsf 650

hi m8,, 1st u need to check the timing with a time light gun,, and trottle the bike to 7000rpm, and see if the timing marks change as u r pointing the gun at it, if they do move ,,adjustment is needed, ,if all is ok u can do a test by taking a plug spanner with u,,and riding the bike up the road, trottle it to 7000rpm,and soon as it stutters hit the kill switch and coast to a stop,, wipp a spark plug and check the colour of the plug, ,u have to look at each plug tho,, if one plug is different colour to the others ,,then the cylinder that plug came from is the problem point,,, another solution is to get your carbs balanced ,,id advise u do this 1st really b4 doin timing check,, cheers

Posted on Jan 30, 2009

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