Question about 1989 kawasaki GPX 250 R

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Gpx mixing screw

Wany got any detailed photos of a kawasaki gpx250 carby, showing where things like the pilot mixing screw are.

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No photos but the should be located at the bottom front of the carbs  they are very hard to get to  and may require a special screw driver to reach them  if u use a small mirror u may be able to see them if u place mirror under the carbs  and shine light up at  them  thier in side a small round cavity about 1/4 inch inside the  bottom of the opening 

Posted on Feb 16, 2009

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Posted on Jan 02, 2017

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MY SPARK PLUG FOULSALL THE TIME. BLACK SOOTY ON THE END OF THE PLUG.


Ok most likely cause for this is jetting (Carbi) and or the air / fuel mix screw set to rich - Well done for noticing though as no where near enough people read their spark plugs and make adjustments - they normally wait til bike don't work before researching?
Simplest and first option would be turn in your air/fuel mix screw quarter to half a turn in (clock wise) this leans the fuel mix slightly
Second option if still not helping from just screw adjustment is put the mix screw back to where it was before and change the pilot jet to a smaller size - the pilot jets have number stamped on them so once you have yours out look for the number and just buy new 1 or 2 sizes smaller (they only about $5 each) then of course go back to fine adjustments on your air/fuel mix screw to find the correct balance
You will very quickly know if your setting is to lean as result of adjustments as you will get back firing when rolling of the throttle if becomes to lean
jetting and air fuel mix adjustments can be annoying sometimes as you may need to go up a bit then down a bit then up again but take your time do very minor adjustments then check results and my tip is only ever change one thing at a time then record the change then test and record the result if you dont you will very quickly forget what you did, not know what to reverse if result was poor and if result was good you won't know exactly what made the improvement.
good luck mate regards Jamie

Jul 03, 2011 | 2003 Honda CRF 150 F

1 Answer

Hi i would just like to know if there is a common problem with the kx 65 I took my son riding today and the bike was running good then it stalled on him now it won't run I got it started for 5 sec then...


No common problems to the KX in particular but very common to all race bred 2 strokes is they all require lots of love and attention so clean air and pilot jets regularly clean air filters regularly make adjustments to the fuel air mix screws to suit time of day and altitudes etc regularly and if you ever have problems starting and stalling throw away the spark plug and replace as you no doubt would have fouled it and the plugs never return back well after that no matter how new they may be!
Revisit your fuel oil mix also depending how you ride and where you ride you may want anything from 30:1 mix to 50:1 mix to give reliability (35:1 - 40:1 mix is good place to start?)
I would change spark plug and clean pilot jet in carbi as first steps for this problem then once sarting again do some tests on different fuel mixes (small steps at a time though) to see what works best
good luck regards Jamie

Jun 03, 2011 | 2010 kawasaki KX 65

1 Answer

Late 1988 GPX250 sounds like noisy tappets. Do these need to be replaced or can they be adjusted?


the valve clearances will be adjustable.
If it has shims for the adjustments, you need to measure the clearance, remove the shims that need adjustment(may need cams removed) and replace shims with thicker or thinner ones to correct clearances.
cam chain also needs regular replacement, and can cause rattling noises, as it may be 23 years old, this is also possible.

Feb 04, 2011 | 1989 kawasaki GPX 250 R

1 Answer

My 94 gpx250 .been standing for a few years,cleaned carb but still lack of power it revs fine when standing but on the move its flat


Pick up some seafoam cleaner and pour it in. To the amount it calls for for your tank size. You may need to clean your tank, lines & replace your needle valves in you carbs.
Old gas is a killer.
Did you change your plugs could be gummed up.

May 17, 2010 | 1989 kawasaki GPX 250 R

1 Answer

1985 Kawasaki GPZ600 carby flooding engine when


sounds like the float level is set to high and it is laeking out the over flow. try adjusting float level.

Mar 23, 2010 | 1987 kawasaki GPZ 500 S - GPX 500 R

1 Answer

My gpx250 wont start unless i put fuel in airbox . was starting fine a couple of monts ago. i put it away for a bit and now it wont start if i put fuel (or carby cleaner) in the airbox it starts for a...


hi buddy take the carb off and take the bottom of the carb off by undoing the 2-4 screws an just pop the bottom off and inside will be the float this needs adjust you need to slide the pivot pin out and the float will just come off with the inlet valve still connected take this inlet valve off just slides off and bend the tab down wards so it allows more fuel in the carbs f2b20fc.jpg
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Sep 14, 2009 | 1989 kawasaki GPX 250 R

1 Answer

Stalls after 1minute of starting


sounds like you have a clogged pilot jet. did you remove the jet and make sure it is clean by holding it up to the light? could you see through it? you mentioned that you cleaned the carbs, but if you didn't remove the jets and make sure they are clean, then more than likely your pilot jets are clogged.

Apr 22, 2017 | 2001 Sachs XTC-N

1 Answer

Hoses on a 01 gpx250


Hi again

Have the link for the manual to get your problem solved. here

you may need to register at the site first to get the download.

The hoses should be colour coded(I hope your still are) and are easy to get mixed up without a decent diagram of the setup. Check page 1.10 for the fuel and emission hoses.

regards
robotek

Dec 04, 2008 | 1989 kawasaki GPX 250 R

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