Maintenance & Technical > KX250 / KX125

02 kx125 head gasket

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Foxx4Beaver:
I would inspect that head gasket very closely, and inspect the head closely.

What was your procedure for re-surfacing the head/jug?
Most of us like to use a compound called TimeSaver...it's just a powder form, and you mix a little bit with tranny fluid...and go in a figure 8 motion on a very hard flat surface....I use a 3/4" piece of glass I got from my local glass shop...others use a steel bench, or a piece of steel.

I'm not tryin to insult your intelligence by explaining all this, just tryin to help you.

larryenticer:
no insults takin....im no master bike tech but an auto tech i am....i used a flat sanding block in steps from 400 600 then 1000 on both surfaces....they looked great no dark low spots on either

Foxx4Beaver:
I myself would try a different gasket...either an OEM or Cometic....and if that doesn't do it, (again, I myself) would put a very thin layer of Yamabond4 on the head gasket, and call it good...even though that won't get you to the root of the problem(it's more like a Band-Aid), but it won't leak anymore.

You're not jetted ridiculously rich are you?
what ratio are you mixin the pre-mix?

Foxx4Beaver:
when the top end was rebuilt...did you disassemble the KIPS valves and clean them thoroughly?

larryenticer:
well the problem is i didnt do piston i only did cyl head as i got the bike from sumone who needed cash fast...so i couldnt say if power valve was cleaned i premix 32:1 plug looks perfect brown not black w spoog or white nice deep brown

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