Question about 2002 Honda CR 125 R

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I want to know how big i can bore out my 125cc 4 stroke motorbike

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I believe the pistons only range from stock to 1st oversize. Boring to first oversize will not make a noticeable change in performance. If you want a real change what you need is a race cam. You will be able to wax any other 125cc and many 150cc bikes. Below is a source.
www.webcamshafts.com

Posted on Sep 03, 2010

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