My 1997 suzuki gsxr ideals really high around 4 to 5,000 when it heats up to temp why might this be?

Question

When i turn down the throttle it makes the bike bog down and cut off?

Answer 1

First, I would check the choke cable and make sure you aren't running with the choke on.... your bike would rev high once the bike came up to temp, and are you turning down the throttle, or idle? Either way, if the bike is choked, when it comes up to temp it will rev high...maybe the cable is broke or out of adjustement and isn't turning the choke completely off...check that first... that would be the easiest fix.

If it isn't that, then it may be an air leak somewhere...now we just have to find it...

Pull your tank off, check your airbox for cracks, pull the top of your air box off and check your air filter for tears or holes...also make sure the rubber seals are in good shape. If everything there looks ok..check to make sure the clamps are all tight on the boots running from the air box to the carbs, and make sure the boots are seated onto the carbs tight, if they are... loosen each s***w on the boots....pull them all four off and check them for cracks/dry rot, kind of roll them in your hand so if there is a crack it will open and you can see it.

If everything checks out ok there, put the air box back on, make sure everything is tight.

The next step will require you to have a long piece of hose the same diameter as your fuel line, and a can of starting fluid. When working on my bike with the tank off, I set my tank up on my work bench, park the bike next to the work bench and run the long fuel line from the tank to my bike so I can run it when I need to. ( I use a 5 foot peice of rubber airline, works great)

Once you have a fuel source, start the bike up....let it run, while it is running, take the starting fluid and spray at the base of each carb..do them one at a time, and spray them GOOD. If you spray at the base of a carb, and the bike revs or idle rises..you just found your leak. Spray the carbs, intake...

If you don't find an air leak or choke problem.. then maybe check the diaphrams inside the carbs, and make sure all of your vacuum lines are attached.

I think what you have going on is no vacuum in the carbs when the butterflies open. You have to have a certain amount of vacuum to get fuel... the butterflies create that vacuum at idle and low speeds...and when they come open the air box and filter create that vacuum...somewhere that vaccuum is breaking, its getting too much air even when the butterflies are set for idle..that makes the idle rise, and when you try to give it throttle it breaks the vaccum completely and the bike dies.

Sounds to me like it is above the carbs somewhere, or a vacuum line.... the boots from the air box, the air filter....something is free flowing air with no restriction to create vacuum.

Also, not familiar with the 97 GSXR, does that bike have an air intake control flap of some sort, or exhaust flap controlled by a TPS sensor on the carb? If it does, you might check that, if the TPS sensor is good, and the servo is turning, you wouldn't get an error code. But if the cables are out of adjustment or broken then it wouldn't be working right even with no error code. An exhaust flap probably wouldn't make it act like it is, but an intake control flap would... if the bike has ram air induction..then it probably has some type of intake control flap on it...im just not sure if the 97 Gixxer does or not, I have never worked on one.

Other than that, if you find nothing wrong with anything I have suggested, then I am all out of ideas.

Good Luck!!!!

Answer 2

Hey I don't know whats wrong with the bike , but what color is your gixxer? ours is a goldish color

Answer 3

check for air leaks around the carbs/fuel in jectors...sounds to me like it's drawing to much air from a crack or loose fitting.turning the idle down just closes off all the air and fuel to the engine making it stall.this has been my past expierience but I have to admit I don't know much about Suzukes...good luck

Answer 4

Synchronize the carburetors.

Older bikes with some mileage on the engine, need the carbs synced on a regular basis (at least once a year).

Each cylinder wares at a different rate than the other 3.

So every cylinder is running with a stronger, or weaker performance as the others.

The carbs have to be synchronized to compensate for the imbalance.

You have to turn up the idle, so the weakest cylinder can stay running.

The other cylinders are stronger, so they will run faster when the idle is turned up.

When you lower the idle, the strong cylinder/s don't have enough strength to keep the weak cylinders running and the engine dies.

Answer 5

look for cracks in the rubber intake boots. could be an air leak.Also you set the idle speed after the bike is fully warmed up.

Answer 6

i would take it to the shop to have it looked at.