Question about 2003 kawasaki KX 125

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Ive got a 96 kx 80 that starts first kick,but battlels on pull off until powerband then takes off wildly.ive changed head gasket plug,set float and cleaned jets.my altitude is 2100 m/s,air screw is set 1 1/2 turns out

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Remove the slide from the throat of the carb. Move the clip on the jet needle one notch lower. Two notches may be needed but start with one.

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ive got a 96 kx 80 that starts first kick,but - d4c3c5d.gif

Posted on Jun 23, 2009

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Does it have a power valve adjuster on the side of the cylinder if so you need to adjust it

Posted on Jun 23, 2009

  • thomas foster
    thomas foster Jun 25, 2009

    did you try adjusting your power valve ? or do you not have a adjuster

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1 Answer

I have kx 85 an powband doesn't kick in I put new govner in an full rebuild can u help


Hi, Frankee and the usual suspects are:
1. Severely drained or faulty battery.
2. Faulty regulator/rectifier or high output coil.
3. Faulty power valve, solenoid or installation.
4. Clogged air filter or exhaust.
5. Cracked or incorrect float level.
6. Float needle is not seating.
7. Faulty reed valve.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
kx85 2003 won rev out
03 KX 85 Powerband Problem Kawasaki 2 Stroke
http://www.kawasakimotorcycle.org/forum/kawasaki-motocross-offroad/148673-03-kx85-powerband-wont-kick.html
bike bogs when it hits the powerband Kawasaki 2 Stroke
Kawasaki KX85 Service Manual

Sep 03, 2016 | Motorcycles

2 Answers

Head gasket or intake manifold gaste again 96 k1500 5.7 vortec. starts runs idles and drives rough it likes to **** while trying to drive almost as if it wants to stall out. i put my scanner on it and


The website has software that looks for obscene words.
I would think a compression test would show if the cylinder is having mechanical problems. And yes the intake or head gasket could be leaking again, especially if the intake or head were warped or cracked.
Have you checked fuel pressure ?
Does the spark plug for cylinder 5 show signs of coolant leaking into the cylinder ?

Feb 09, 2013 | 1996 Chevrolet K1500

1 Answer

Kdx 125 sputters just before the "powerband" kicks in


I used to ride enduro in the 1980s on a KLX 250 :>)

Sounds like you have two issues.

Your spluttering and jolting sounds like a defective Reed Valve, but could also be carburetor float level problems. If it is runs fine when on the power band, then the carb is fine. For the cost, I would replace the reed valve.

http://www.athenaparts.com/eng/sections/view/128/carbon-fiber-reeds-for-intake-reed-valve/page:6

Regarding the electrics, this could be a few things. Check all the earthing points, especially the one on the negative side of the battery. Take the wire off where it grounds to the frame, clean and apply Vaseline which stops corrosion and is electrically conductive. Check all the connectors that you can find. Pull them and make sure they are clean and sealed. Vaseline is good on these too. The specs below confirms it is rectified and regulated. Check the output voltage of the alternator with a test meter. Check the battery is as spec Battery 12v 3Ah and get it stress tested, or just replace it, if it older than 3 or 4 years.

You really need a good workshop manual. I had them for all my scooters and bikes.

Manual
http://www.servicerepairmanualonline.com/859/kawasaki-kdx125-kdx-125sr-125-manual/

Spare Parts List
http://www.cmsnl.com/kawasaki-kdx125-a3-kdx125sr-1992-europe-nr_model11759/partslist/

Specs
http://www.motorbikespecs.net/index.dyn?flag=2&model_id=1914354&make=Kawasaki

Voltage Main Fuse 20A
Ignition CDI electronic advance
Charging System 3 phase AC, 27V@4000rpm. Rectified 14.5@4000rpm
Spark Plugs NGK BR8ES
Bulb-Headlight Battery 12v 3Ah
Ignition Timing 10.5BTDC@1300rpm - 26.5BTDC@3000rpm

Engine Type Liquid Cooled 2 Stroke Reed Valve Straight Single Bore x Stroke 56 x 50.6 mm Compression Ratio
Displacement 124mL
Lubrication System Oil injection
Starting kickstart
Carburation Keihin/PE28
Carburation Main Jet 115
Carburation Idle Jet 48
Pilot Screw Setting 1.5
Red line RPM 10,500rpm


kawasaki KDX 125 Google Search

Apr 02, 2017 | kawasaki KDX 125 Motorcycles

2 Answers

The powerband on my 2007 yz125 doesnt feel like its running strong at all. the powerband wants to scream but it's like as if it hesitates or kicks on and off. whats going on???


Hi, Andrew and the usual suspects are:
1. Severely drained or faulty battery.
2. Faulty regulator/rectifier or high output coil.
3. Faulty power valve, solenoid or installation.
4. Clogged air filter or exhaust.
5. Cracked or incorrect float level.
6. Float needle is not seating.
7. Faulty reed valve.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
01 YZ 125 no power band please help Yamaha 2 Stroke
https://www.floridatrailriders.org/ftr_forums/showthread.php?t=1302
YAMAHA YZ125 Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Sep 11, 2012 | 2007 Yamaha yZ 125

1 Answer

I recently put a new head gasket on my '99 KX 2 stroke. It blew the head gasket and drained all the radiator into the lower end. It was a pain to clean out, but I reassembled everything, took the bowl...


Hi, Brandon nice novella, it could be a funky power valve and they are moderatley easy to clean/repair and you will need the free manual provided below as for a gasket/o-ring you may be able to reuse the old one if you are careful removing it, worse case scenario you can always make a gasket out a cereal box and use high temp silicone for more information about your question and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Kawasaki KX powervalve set up
How to install KIPS on Kawasaki KX 125 Power Valves
Kawasaki KX125 Service Manual
OEM Parts for Kawasaki
Kawasaki kx125 1997 Owner Manual

Feb 28, 2017 | 2003 kawasaki KX 125

2 Answers

Oil contamintation, 1998 KX 250


Normally water gets in through the head gasket, sometimes you can hear if the head gasket has blown. One way of finding out is to take it to your dealer and ask them to do a compression check that will tell you if you have a duff gasket. You will also notice a slight drop in performance.

Aug 17, 2009 | kawasaki KX 250 Motorcycles

2 Answers

Water into oil after going through creek and lost all compression. What can I do?


sounds like exhust valves rusted open or hung up.. pull head on cyclinder... drain crankcase oil put in fresh oil.. reassembile head with new gasket.

Jun 17, 2009 | Suzuki RM-Z 250 Motorcycles

2 Answers

White smoke coming out tailpipe


If your intake gaskets are leaking, when you dump soapy water on the gasket, it should bubble like crazy ( when it's running). If you can, run it with the rad cap off and watch for bubbles. If it keeps bubbling, you probably have a head gasket problem.

May 14, 2009 | 1996 Chevrolet Cavalier

1 Answer

Problem with the powerband on my kx250


sounds like you need a new power valve in the cylinder. They can go bad and thats how they will act. You have to take the cylinder off to change it. If your that far you might as well put a new piston and ring in it.

Jan 23, 2009 | 2003 kawasaki KX 250

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