Maintenance & Technical > KX500 Original

Is the piston considered bad when...

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Paul:
Shannon, with that damage on the exhaust side of the jug what does the nikasil look like around the exhaust port? Still shiney hopefully and NOT flaking.

ShanMan:
Actually Paul, the cylinder looks really good. There is no flaking and no scoring at all. Even the cumbustion chamber in the head looks perfect with virtually no carbon buildup. I think running it at 32:1 really saved the cylinder...of course, not riding for 8 weeks might have helped too!  :wink:

Zombie:
I ran an '88 sleeve AND '88 piston in my '85 without any trouble. It just looked slightly funky with extra exhaust ports that didnt go anywhere.

-BTW- yes, it is bad when your piston looks like that :wink:

-Z

ShanMan:
Alrighty then....saga number two: how to get a stubborn wrist pin out without using some fancy-shmancy puller tool???  :oops:  :wink:

woodsy:
Take a socket that is large enough to let the pin into, cover the leading edge of the socket with duck tape about 4 layers thick so it dont mar the piston, take a knife and cut the center portion of the tape out so the pin can go in.  get another socket that will fit inside of the pin hole (probably have to be a deep well).  Put sockets in place and drive the pin out with a C-Clamp - WORKS GREAT!!  
Hey, sometimes you have to resort to "creative thinking" when working on this stuff :)))
Wanna hear how I ground the valves in my XR one time.......
Woodsy

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