Compression Reading For KX85?

Joined
Jul 12, 2005
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#1
Hey Guys,

I think my sons KX85 overheated and did some cylinder damage.
The problem stemmed from the bike ingesting its own coolant. I had topped it off last Saturday but did not check it again yesterday (mybad)
The bike ran well and then quit. Will not start now.
I checked the coolant level again and it seemed way low. I don't think these bikes hold much coolant to begin with?
Anyway, I want to check the cylinder compression. What should it be about?

Thanx
Bernie
 
Joined
Sep 12, 2006
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#2
160 - 170 psi seems to be pretty normal for the KX85's and KX100's. The factory manual states 119 - 180 psi as usable operating compression range. 119... who came up with that number? And I have never seen one of the KX85's that made 180 psi either.