Maintenance & Technical > KX500 Original

she wont rev out...

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Grunty-Motor:

--- Quote from: Jopiz on July 15, 2009, 10:38:21 AM ---There you go! http://www.allthingsmoto.com/forums/f-15/how-set-your-motorcycle-carburetor-float-level-more-commentary-13608/

By the way did you happen to change to ATF type F or similiar from normal 10w30 or 10w40?  :mrgreen:

-J

--- End quote ---

cheers J - my floats are sitting too low. hope thats the issue.

And, yes, i am running 50/50 ATF & 10/40 - why you ask?

Jopiz:
Im just asking because i had same thing a few week ago. In my case the viscosity of the ATF type F oil was so big it came through the smallest imperfections into crankcase. I re-surfaced my crankcases and problem solved! I thought it was the crank wet seal that was leaking but it wasn't the issue. Previous owner used normal motoroil in the tranny. Its a lot "thicker" than ATF F.

Adjust your float level and post us some info how it runs. Try switching normal 10/40 if float level doenst make it run any better.

-J

fredodido:
well well,

i found my problem...

my exhaust valves are so for of carbon, nothing is moving ... so i decoded to do a complete buttom and top rebuild. this way i start fresh. and i also think it is the cheapess way to go long term.
i already took the engine out, everything look very good, no bad surprises...

so hope you find your problem soon. :-D

Grunty-Motor:
good to hear - it might be a bit of work, but atleast you know the cause.

Grunty-Motor:
bit of an update (been struggling for time.....)

1. float bowl set proper = no difference
2. new carb slide (old one has ridges in it but i thought it was ok) = no difference
3. changed tranny oil back from ATF to 10/40 = no difference
4. fitted coil from my ktm - it now revs cleaner, but there is no real power there

PLUS,
coolant coming out of overflow = weak rad cap or head gasket probs?
plug is a bit oily - maybe its cause its been running crap for weeks?
its surging on the over run

next step is to get a kx coil and i'll run it a bit longer incase it needs clearing out (clutching at straws me thinks)

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