Need Help 98 zx6r!!! - Kawasaki Forum :: KawasakiWorld.com
 
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post #1 of 9 Old 01-23-2015, 11:26 AM Thread Starter
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Need Help 98 zx6r!!!

Hey guys i really ned your help. Im trying to figure out what is going on with my brother 98 zx6r. last year he was riding and it cut off on him. i could get is started but if i gave it any throttle it would cut off. I was able to get it to stay on by adjusting the idle set screw and using a little choke and got it home. i did a tune up changed the plugs and air filter and such no luck so we took it to have the carbs cleaned. That helped but still was missing and running real funny. so i took it apart checked the vacuum lines all seemed good but the fuel filter seemed slogged blew it out and seemed to be running quite well. so my bro rode it quite a while but started running like **** again. so he parked it in about late oct. so i finally got a new fuel fliter changed it and now the same thing. it idles between 15oo-2k rpms if i barely give it throttle itll rev to about 4500-5k rpms and cut off or if i give it more than 1/8-1/4 throttle itll cut off any ideas what can be going one? carbs out of sync maybe i dunno im at a loss and he cant really afford to put it in the shop any help or suggestions would be great thanks in advance.
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post #2 of 9 Old 01-23-2015, 11:36 AM
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Have you checked the petcock at the fuel tank? Sometimes the O-ring/gasket can deteriorate and become misshapen and disrupt fuel flow. Just throwing out ideas.
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post #3 of 9 Old 01-23-2015, 11:53 AM Thread Starter
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no i havent but i certainly will at this point ill take any suggestions and check them out ya never know
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post #4 of 9 Old 01-23-2015, 11:55 AM
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Vaccum leak.

"In a world full of hate.....There is nothing left to divide."
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What's wrong with you people? The sky is MANY colors throughout the day....not JUST BLUE!
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post #5 of 9 Old 01-23-2015, 12:06 PM
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Those carbs have rubber everywhere. It is either flooding out (possible but I don't think so by your description), or more than likely has a vaccum leak somewhere. Check the boots where they mount to the head, pull the black covers off the tops and check the slider diaphrams for pin holes, check ALL vaccum lines, to the fuel petcock is one, the rest, after all these years of heating and cooling they get hard, brittle and crack. You would still be able to revv if they were out of sync, unless is was so bad, which if that was the case you would be able to see it with a visual inpsection manipulating the throttle plates with the carbs off the head and looking at them opening. You have a vaccum leak somewhere I would bet.

Those same sliders in the carbs, if they are worn out, they could be sticking as well, which would cause the same condition. Check for heavy grooving and wear. They slide up and down, and get pretty messed up over years of use.

"In a world full of hate.....There is nothing left to divide."
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What's wrong with you people? The sky is MANY colors throughout the day....not JUST BLUE!
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post #6 of 9 Old 01-23-2015, 12:10 PM
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Also look for missing caps on vaccum tits on the carbs.

One way to check the boots is when the bike is running at that high idle, spray some carb cleaner all around those boots, and if the engine bogs or stalls, you know where to look. Pay attention to where you spray tho, don't just go nuts with it. One boot at a time, one line at a time ect. It won't take much to cause a change in the engine.

"In a world full of hate.....There is nothing left to divide."
T. J. Maiden ca. 1994


What's wrong with you people? The sky is MANY colors throughout the day....not JUST BLUE!
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post #7 of 9 Old 01-23-2015, 12:22 PM Thread Starter
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ok sounds good once the weather gets nicer ill definitely check that out but thats where my mind was going was vacuum leak i just couldnt find one but didlook at all the places u were saying ill check those out thanks
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post #8 of 9 Old 03-10-2015, 02:42 AM
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Also check for a kinked fuel line, or if the bike has an in tank fuel filter be sure that that is free of any dirt just to cross that off the list

If you are not living on the edge, you are taking up too much room
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post #9 of 9 Old 03-10-2015, 11:25 AM
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Carb cleaner can also sometime make the bike rev, not just bog or choke... Your just looking for a change in rpm either way.

My carb cleaner is pretty much starter fluid lol

still a good test to do!
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