Question about 1984 kawasaki KE 125

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Idles high when choke is fully closed

I have a 1984 ke 125 when you close the choke it will go into a high idle open just a little she idles and runs fine. anybody with some input could reallyhelp me out .

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  • lilmissch722 May 26, 2009

    thanks for the info jpolicky you gave me some new things to test out i was thinking it could be the pilot screw adjustment.the carb is clean and has nothing clog up.you now have thing about a leak in the crank seal, head or base gasket .do i spray the head with carb cleaner or in the carb ?if there is a leak the idle will change if it dont, does this mean i have no leak?

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You are running lean. it could be a leak in the intake track. a plugged carb passages and or jets. A leak in a crank seal or head or base gaskets. spraying carb clean in any of these areas will change the idle if it is leaking in that area

Posted on May 26, 2009

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If you've tried to reset the idle pins on the throttle plate and that did nothing and also checked the throttle postion sensor (TPS) and engines codes, then it could be that the air bypass valve (APV - electronic engine control idle control valve) is simply stuck open.

The APV is a little black (3") solenoid valve bolted on the front of throttle body, 90° from the TPS that, when energized, allows addtional air to bypass the throttle plate (as if you were holding the pedel down some). It's the fancy modern equivalent for the much more complex 100% mechanical assemblies that were in old time carbs that set high idle air flow when you also had set the choke.

The APV is used (energized - opened) to set the high idle when the car is cold and closes (de-energized) when the engine reaches temperature. It can get all fouled up with recylced exhaust and/or crankcase recirculation fumes from the emmission control system. If you take it off and manually actuate the piston, it should move in and out freely and, all by itself, it should return (via a spring) to the normally fully closed position. If not, try cleaning it with some brake cleaner or get a new one.

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