Question about 1992 Suzuki GSF 400 Bandit

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My suzuki bandit is idling at 6000 rpms whats wrong ?

I took off the carbs to clean them when i put them back on it wants to idle super HI 6000 RPMS !!! I set the pilot jets to 2 turns out but i have the e clip on the main jet needle set all the way to the bottom notch because this is the only way it would run im not sure whats going on !

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Engine dies when idling seems like electrical problem. wait a couple of minutes with key off, starts right up.


re-tune the idle mixture setting
check for vacuum leaks at the auto transmission actuator , vent controls
raise the idle rpms to around 650

Nov 02, 2015 | Cars & Trucks

1 Answer

My 1980 GS550 Suzuki idles to high, about 3 to 5000 rpms. how do i adjust the idle.


adjust off the cable so its slack ! then between the carbs there should be the idle adjuster screw and back it off till rpm is about 700 ! rev engine and see if it returns ok ! ? if not then remove carbs and free off the butterflys etc etc !

Apr 19, 2014 | 1980 Suzuki Gs 550 L

1 Answer

Just bought a 1993 suzuki gsxr 750. has been sitting in a garage for 2 years. we took the carbs off and cleaned them really well, changed the oil, and air filter and we added new gas. bike starts up and...


If is runs better with full choke, then the bike is lean, check for air leaks at the carb manifold, vacumn cracked hoses, non standard exhausts, perhaps the mufflers have rusted out while sitting

Apr 24, 2011 | 1993 Suzuki GSX-R 750 WP

1 Answer

The bike will not take throttle, refuses actually, carbs are clean and in sync, Bike idles perfectly, but when any throttle is given, the engine is restricted to 2k rpms. Stock jetting, and a slip on pipe.


i think the fuel filter inside the tank is dirty, or the fuel on the float bowl of the carb is low that when you give gas the fuel in the bowl runs out.

Aug 19, 2010 | 1991 Suzuki GSF 400 Bandit

1 Answer

Idle problems


remove carb bowl and clean it and the jets with carb and choke cleaner, put fresh gas in tank to ensure its all good

Jun 15, 2010 | 1994 Suzuki GSF 400 Bandit

1 Answer

05 Bandit 1200S idles low, run rough at low rpms,


Try buying new diaframs for your carbs, because of the diafram and piston operation, if the diafram becomes weak due to heat from your engine, and by the diafram not beeing rigid enough, it hesitates to lift the needle out of the jet causing the lack of fuel at low tack/rpm when throttling up or accelerating slowly.

Jun 11, 2010 | 1997 Suzuki GSF 1200 Bandit S

1 Answer

Bandit idles HIGH when hot Just bought the bike! My bandit 1200S, 1997, runs smoothly when the engine is cool. But at hot temps when the bike warms up, the idle increases to 3000rpms. It doesnt want to...


OK.... firstly change the fuel cap, the tank needs to be vented correctly so pressure will equalise. Normally a rich fuel concentration will cause the engine to die not run high. From what your telling me it sounds like the throttle cables are not adjusted properly, if they are too tight the rpm's will not come back to idle. if this is the case you might be able to twist the throttle the opposite direction to lower the revs at idle. For the excess fuel problem, it could be what you say about the fuel cap, another thing will be the Needle and Seat might need changing or the float levels are not adjusted correctly. Whilst your there fit a good inline fuel filter, it will stop problems in the future.

Nov 12, 2009 | 1997 Suzuki GSF 1200 Bandit S

1 Answer

I have the same idelproblem with my bandit carb


When you want to change jets for more fuel.. they actually come in Jet Kits. you can try different sizes but will have to change 3 knobs for proper mixture of gas/air ratio. The knob adjustments you just have to try one at a time for proper adjustment and only turn 1 knob 1/4 turn at a time. Tightening the knob makes less gas flow and loosening allows more gas. the three knobs are for 3 different ranges of RPMs. there is a low mixture knob, mid range knob, and high rpms knob. for example if your RPMs at idle through 5k RPMs are boggy, you can try a 1/4 turn and if it gets worse do a half turn back and ride again. do this off the street where you won't disturb traffic. it takes a while to get it running properly mixed.

Oct 20, 2009 | 1992 Suzuki GSF 400 Bandit

1 Answer

92 suzuki bandit 400 gs-f, ran but it didn't idle after carb clea


hi buddy on my bike i had this problem when you rev it it will rev down gradually so it changed the jets and ir worked so try this buddy then get back to me give me a good rating

Sep 15, 2009 | 1992 Suzuki GSF 400 Bandit

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