kawasaki zzr 400 problem

[KAWIguy14]

i recently bought a 2nd hand 1993 kawasaki zzr 400 and its not in "running condition" when i got it. then i immediately took it to my certified bike mechanic so after a week of dismantleling it and repairing the carbs,flushing radiator water,checking water pump etc..it runs smoothly the only problem is that after a few kilometers while riding it ,,first the bike jerks like misfiring then it suddenly stalls and the engine dies but after a few minutes or so the engine runs again then the problem starts all over again after a kilometer ride...can you pls help me what causing this problem??my mechanic told me that all cooling system is great i even saw it while the radiator cap is off the water runs great and the engine in normal state of temperature...is this electrical problem?or maybe the CDI is worn out?

all inputs are very much appreciated thanks


from the philippines ride safe ya'll

[CaNsA]

get over to

https://www.zxrworld.co.uk/zxr400oc/index.php

and ask for help, they are awesome

[Kickstart]

Hi

My first guess with a problem like that would be fuel starvation, probably from a blocked breather hose for the fuel tank (could just be kinked). Takes a while to have an effect, but as fuel is used and air cannot get into the tank to replace it, it builds up low pressure in the tank until the pressure is low enough to stop fuel getting out of the tank. When it happens try opening the fuel cap while listening carefully. If you hear air being sucked in and then the bike starts fone then that is the problem.

Could also be other things, such as a blocked fuel filter, dodgy fuel pump (think the ZZR has a fuel pump), coil getting too hot, etc, but the breather would be the first thing I would check.

All the best

Keith
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[Barry_M2]

The first thing that sprung to my mind when reading the symptoms was also fuel starvation.

Go with Keith's suggestions above and then come back...


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[KAWIguy14]

[KAWIguy14]

[Kickstart]

[Theoutsider]

Hi.Try a new set of spark plugs and carb balancing,it should do the trick.

[chris-red]

I agree with Keith, all the bikes I have had have had 2 hoses coming from the bottom of the tank that go to the bottom of the bike you should see them hanging down slightly. Lift the tank up then put it down but as you are putting it down get somebody to pull on these lines gently to keep them taught this should stop them being kinked.

https://img.photobucket.com/albums/v295/chris-red/06052009225.jpg

Here is a picture of mine from the Speed Four.
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[temeluchus]

[KAWIguy14]

[Kickstart]

Hi

There might well be 2 non fuel pipes. One as a breather and possibly another to allow water to drain away from around the filler cap.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[steveh]

Out of interest its not a purple one is it? friend of mine sold one not so long back, i do have a few spares lying around aswell if you need anything.

cheers, steve.
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Current : 06 Zx10r, 07 Wr450f SM, 74 850 norton commando, 63 bsa b40, 1962 Triton 650, 67 Triumph Tr6r, 1955 Triton 750, 1978 TY250E.