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KX250 / KX125 / Re: 97 Kx 250 top end thoughts
« Last post by Borntworide on February 09, 2020, 01:11:53 PM »
Pull it down , might only need a set of rings .But be sure to dissemble power valve and clean real good , i hope your using a good 2 stroke oil , some 2 stroke oils are real dirty and leave a black film on internal parts like motul 800 . Just remember if the piston has wear on it replace it to as it will wear the cylinder coating then it will cost you more for a new plate job.

I have been using motul for 10year , smh
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KX250 / KX125 / Re: 97 Kx 250 top end thoughts
« Last post by KXDINO on February 08, 2020, 07:55:27 PM »
Pull it down , might only need a set of rings .But be sure to dissemble power valve and clean real good , i hope your using a good 2 stroke oil , some 2 stroke oils are real dirty and leave a black film on internal parts like motul 800 . Just remember if the piston has wear on it replace it to as it will wear the cylinder coating then it will cost you more for a new plate job.
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KX250 / KX125 / 97 Kx 250 top end thoughts
« Last post by Borntworide on February 08, 2020, 09:29:11 AM »
I bought my bike new, Its always been well taken care off, I have been off from riding for a good number of years other than a spin around the farm, looking to get back into this year as much as I can finally or time-wise.  Figured, I have to do something for me now.  I don't know when I did last top end or how many hours on last piston change.  Figured I would change all the fluids, clean carb, clean and grease all bearings, take compression, reading.  Now with that out of the way, I have 150 psi for compression, (snap on gauge) wide-open throttle -kicked for a few. 

Compression is good I believe at 150. My question is:  tear it down , inspect cylinder, connecting rod, clean carb, replace piston/ring anyway, clean power valves or Just skip top end and do rest?

This bike has always been good to me I believe because I have well maintained it. I am leaning toward doing a top-end. Financially I am thinking of not doing it because I need tires , tubes, kick starter , kick starter shaft, clutch cable, front and rear pads, rear rotor, chain , sprockets, plastics.

I probably answered my own question and should just bite the bullet and do it. Figured I needed a push lol

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KX500 Original / Re: Kx500 snowbike light
« Last post by Polar-Bus on February 08, 2020, 04:15:05 AM »
Ok guys doing some more research the light draws 1 amp

Here's how I did it. Works excellent.

https://www.kxriders.com/forums/index.php/topic,6603.msg49759.html#msg49759

*edit , sorry for all the missing images, friggin goddam  greedy pigs photobucket  changed over to a paid image host subscription or they delete your images.. 
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KX500 Original / Re: KX500 Crank oil seal issue, help !!!
« Last post by dave916 on February 07, 2020, 06:38:53 AM »
Main bearing loose in case in common, never seen seal loose on kv5
Bearing retainer should work good since the seal is steel outer

leo Sadzerwiczon kx GURU [FACEBOOK] made insert for smaller removable from outside seal / would work good for u
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KX500 Original / Re: KX500 Crank oil seal issue, help !!!
« Last post by Dad of Alf on February 07, 2020, 02:11:53 AM »
Hello Sandblaster,
Yes I used a genuine Kawasaki seal with a small amount of bearing fit solution.
Then made a retaining washer on the lathe that went in the shallow recess between the main bearing and the seal. This was measured to ensure there is a 'light squeeze' on the seal once the main bearing was fitted, fully home.
The seal protrudes inwards a small amount once fitted, Note : There is a very small ring of rubber on the circumference edge (the thin edge innermost when fitted) on genuine main seals. This washer pushes against that edge.
I put a few dots of threebond in the recess beforehand to hold the washer in place to stop it bouncing out.
I also notched the washer so a tab bent into the cylinder drain 'groove', That way the washer doesn't rotate thus blocking off that drain hole.
Pressed bearing fully home  ... all good. 

Thanks
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KX500 Original / Re: Kx500 snowbike light
« Last post by Wilde1yamaha on February 06, 2020, 03:13:15 PM »
Ok guys doing some more research the light draws 1 amp
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KX250 / KX125 / 93-94 kx125
« Last post by Guitarmann on February 05, 2020, 03:41:32 PM »
Hi, I have a 94 kx125 I just rebuilt the top end on. I later found the governor spring gear that opens the power valve. Well the bearing are worn. When i ordered a new one it did not match the one in it. The one in it resembles a 93 governor spring gear. Could it have been built early enough they would have put the 93 spring gear in it? Just want to make sure before I order it again. Thanks in advance.
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KX500 Original / Re: Airbox help!!
« Last post by climbku86 on February 04, 2020, 03:47:12 AM »
The carb to the motor is fine. The issue is the elbow and filter to the carb. See attached. The lip on the Lectron is smaller than the Mikuni. If i could go back to stock it would be fine but I can't find parts. How do I fix uploader is full?
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KX500 Original / Re: Airbox help!!
« Last post by sandblaster on February 03, 2020, 12:28:50 PM »
Is the current carb shorter than the stock carb?
If so you can use a reed spacer block.
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