Maintenance & Technical > KX250 / KX125

How often rebuild?

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mustangfury:
I have a 93 kx 125.  Approx. how often do you usually have to rebuild the top end?

gowen:
I usally shot for about every 20-30 hours with my 125s.

alan:
I have always gone by compression to decide when to rebuild the top end. When it gets to between 75 to 80% it's time! :-D

hughes:

--- Quote from: gowen on September 28, 2007, 01:40:53 AM ---I usally shot for about every 20-30 hours with my 125s.

--- End quote ---

I agree that 20-30 hrs would be cool for the average person. If I was racing this 125 at a high level I would shorten that down to 10-20 hrs. 125 have alot of stress on them due to the fact they need to stay a high engine rpm to produce the power that is needed.

mustangfury:
Thanks for the advice.  The last time I rebuilt it was due to lack of compression.  I think i might try going with that.

Thanks again.

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