Maintenance & Technical > KX250 / KX125

Testing compression

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donnieray:
Been track and trail riding weekends just a bit worried, hadnt had the kx long and dont know when was the last rebuild. The bike looks new!

Coop:
No certain number of kicks. Hold the kill switch down, hold the throttle wide open, and kick until the needle stops. Do it to 3 times and average your results.

BDI:

--- Quote from: donnieray on July 24, 2010, 09:56:06 AM ---Been track and trail riding weekends just a bit worried, hadnt had the kx long and dont know when was the last rebuild. The bike looks new!

--- End quote ---
Put a new top end on it then. Skirts of stock pistons can show cracks in as little as twenty hours. Just because it has good comp does not mean it does not have cracks. If I was the type of person to worrie about that type of stuff I would put a new piston and rings in it and an hour meter, then start counting hours.

donnieray:
Thanks for the advice guys, top end is ordered, lookin for an hour meter now!

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