Hi guys, problem with start

[kx250.1698]

Hi,

I have a kx125 93 model, the bike have a problem with kick starting it.
when you kick start it the bike has no spark!The wiring of the bike is corect!when you push start the bike it starts and runs without problems.(starts very easy first try).so what could be the problem?

[DoldGuy]

A fresh 93 KX125 has 165 to 170 compression, what is yours??

[kx250.1698]

Im not sure the bike have been done about 4 months a gow from the guy i bought it from. he newer knew what was the problem, it has a wiseco piston in?

[Hillclimb#42]

My guess is also down on compression.  The spark is hard to see, so i'm saying its there kicking or pushing. could be weak, which would be a bad connection or loose or bad ground. Nothing should be happening to ignition differently when kicking or pushing, other than it turns over more. My 250 would not be easy to push start cold, on flat ground, so I'm agreeing that its compression. Everyone says they rebuild them, but they often are calling rings and a gasket a rebuild. Better look in there and see whats going on with piston and cylinder plating. you can pull exhaust pipe and look in that side easy to do a quick inspection of rings, piston and cylinder. Thats just one side, but you can usually tell alot from looking there. Once the plating is chewed away, compression goes away fast.

[kx250.1698]

oke kwl; thnaks will do that, other wise wil take it to bike shop to have a look at it

[kx250.1698]

but bike runs gr8 no problems

[Hillclimb#42]

A bike shop is like going to the Doctor. You get medicine for what you describe as symptoms. You might as well self-diagnose.

[kx250.1698]

Thanks trow n wil get some one to mesuare the compression level. thanks

[Hillclimb#42]

Somethin's up that's a simple fix, probably. Maybe even as simple as a new method of kicking. trying the choke when warm or holding the throttle wfo. No choke when cold. Pushing means there's a problem, but since it runs good, its hard to say why. If it turns out to be low on compression, you'll be real happy when its fixed.

[kx250.1698]

hehehe jah, but even i take the pluge out of the engin and then put my finger in the coil and kick it hard with my boot there is no spark?

[gwcrim]

I just went through this with two mini bikes.  Both were hard to start, both seemed to have weak spark.  Both wound up needing top end overhauls.

If you intend to be a life long gear head, buy your self a nice compression gauge.  You'll use it more often than you think.

[kx250.1698]

Yah, will buy me one but my kx dont even have spark when you kick it!