Question about 2005 Suzuki GSF 650 N Bandit

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Poor running suzuki gsf 650

Hi my suzuki gsf 650 2005 model is lacking power at 7000rpm but from 0 to 6500rpm its fine and again when it reaches 9500rpm it goes like a rocket but it has a problem at 7000rpm to 9000rpm like fuel or timing

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  • tommyone849 Feb 01, 2009

    Sorry its taken me some time to reply anyway here goes the bike is stock all parts are STD what happens is that when i reach 6500rpm it feels like it is misfiring or fuel problems or its down on a cylinder the fuel use is very high as well i have cleaned and replaced all fuel filters and fitted new plugs but there is still no difference the bike also lacks top end speed so it also feels like its dieing when you open it up to overtake a car or bus it splutters so i do not know what is going on with this bike, just waiting for the thing to die completely.

    thank you for your help Tommy

  • joe May 11, 2010

    is the bike all stock or did someone add an aftermarket air cleaner or exhaust pipes?

    does it look like someone has tried to rejet the carbs?

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Balancing your carbs will NOT solve your problem,and riding it to the point where it stutters and hitting the kill switch and coast to a stop will tell you nothing unless you rode it at this problem rpm for at least a few minutes.

Yes, take out all the plugs and see that they are burning correctly, but the fact that you are using too much fuel suggests that you have a carb issue , and the fact that you have a dead spot at those rpm would also indicate a needle position or a jet problem.

If your plugs are darkish brown or darker remove your carbs ,service them and I would suggest moving your needle clip 2 notches up and reducing the size of your main jet by 2.5%.

Posted on Aug 07, 2009

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I had the same issue on my 03 600s Bandit and the solution for me was the battery was low on fluid , after replacing with a gell cell i still had the same problem after like 2 weeks, that time it was the terminal would get loose and it was an electric issue ,... tighten the bolts and see if that helps ,... they vibrate loose every now and again

Posted on Apr 23, 2009

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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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rate me good ;o)

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