Kawasaki Dirt Bikes Forum

i have a 2000 kx 125. i went out to ride in some trails. i was riding it fast and hard for most of the ride. i stopped, turned it off, started it back up, and reved it up a couple times(NOT TO REV LIMIT), and directly as i let off the throttle the bike made a funny metal on metal noise from the exhaust. it sputtered, and turned off.

engine head? or do u think its time for an entire top end rebuild?

and what ratio coolant do 2 strokes take?  

You definately need to pull the topend! Metal on Metal= seizure

You can buy premixed coolant at your nearest dealer.  
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Nobody's gonna hurt anybody. We're gonna be like little Fonzies here. And what's Fonzie like? Come on what's Fonzie like?

isn't a seizure when the piston gets locked up in the cylinder? cuz the piston still moves up and down.

im gonna take off the top end off and inspect it for damage today hopefully if i have time.  

I think what Chud was trying to say was, that metal on metal will eventually result in a seizure.  
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As the metel gets hot or cold it will contract and if you have a piston/top end issue it can cause a semi sizure and can crank when cold.
If not taken care of will cause full sieze and  crank and bottom end damage.
Do not try to start and pull the top end.  
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Ruff!

oh alright i understand now thanks 93rm125 and yzwoods.

yzwoods, you said not to pull the top end off...why not?  

No, I ment don't keep trying to start the bike.
And DO pull the top end!  
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Ruff!

You perhaps could have have phrased it a little better Woods.
Better because was going to ask the same question as TMG. Until I re-read what you put. And fully understood it.  
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yzwoods:
No, I ment don't keep trying to start the bike.
And DO pull the top end!

haha now i get ya!

i drained all the coolant out and stripped the bike down to get ready to start taking the top end apart and i just could not get the head off . im not stupid i know how to take apart a top end, but this stupid thing keeps getting stuck when its about 1/4 inch off of the cylinder. its always come off easy before this.

has this happened to any of ya'll? how do u get it off without damaging anything?  

What little thing, little bit more info. And pics!  
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Do you mean the bolts wont come out?
And 92, Refer to my new song. (UN-Screw you 92) lol.  
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Ruff!

Does he mention bolts? No, I think not.
He is obviously talking about the stupid thingy, aka The Watcha Ma Call It.  
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lmao. sorry...

the cylinder head gets stuck and wont move when i get it about a quarter inch off the cylinder. its practically impossible to get off. what should i use to help get it off that wont damage anything?  

sounds like power valve problem (the rings will stick on exhaust side when the plating comes off the cylinder).need to tear down and inspect and I believe you will find the problem...and say  damm now what!!!(as I usually do)