starting my kfx 400 - Kawasaki Forums

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Old 04-28-2008, 02:44 AM
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Default starting my kfx 400

i have a new battery. carb is in great shape. and has spark...

i can pull start it and it fires up everytime..
but no matter how long i start it in neutral giving it gas, messing with the choke. using starting fluid, it wont start.... then as soon as i pull it with the truck it fires right up....
any thoughts?? maybe the igniter?
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Old 04-28-2008, 04:46 AM
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Default RE: starting my kfx 400

Yes one thought, and I almost hate to suggest this, you might have low compression. I'm not familiar with your machine, but back in the day I bought an 1985 Suzuki Quadracer, two smoker, and I got it home and it would not kick start for anything. I pulled it with the truck and it would finally start, but as soon as it was cold again I got nothing. Finally I got fed up and took off the jug and found a hole in the piston about the size of a bb like as in a bb gun, it didn't have enough compression to fire with just the kick, but I guess pulling it would cause enough to get it to fire. Now in your case if it's a 4 stroke with valves, you might have one that is sticking, or burnt. Good luck, but that is the only thing I can think of. Oh wait what color is the spark? If its yellow then its weak and it may just be the coil. Good luck man.
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Old 05-01-2008, 02:00 AM
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Default RE: starting my kfx 400

My 400 needs to be run....hard. Anytime it sits for a couple of weeks, it can be a chore to get started. Deej could be right. You could have a valve sticking. Get up real close to the motor at idle and you may hear an unusually loud ticking. I know when I have mine thoroughly serviced and fine tuned, I always have the valves checked.Coil, compression, could be one or two of many possibilities. Talk around a little bit and take it to the shop everyone seems to favor. I know where I live, EVERYBODY takes their toys to the Kawasaki mechanics.

PS: Don't make starting fluid a habit..........
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Old 07-05-2008, 05:23 PM
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Default RE: starting my kfx 400

i have a03 kfx 400 and i had a similar problem and i took it apart and it was the igniter and mine wasnt getting enough compression. so i replaced the piston and rings and replaced igniter and i havent had a problem since.

and Hunter is rite do not keep using starting fluid, it is terrible for it
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