how to tell if a 400ex has been bored out

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Aug 6, 2010 | 06:13 PM

honda400exdude1

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Weekend Warrior

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how to tell if a 400ex has been bored out

I need to know how you can tell if a 400ex has been bored out?

Aug 6, 2010 | 07:11 PM

zach0199

Trailblazer

Joined: Apr 2010

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Contact the prev owner or take it apart?

Aug 6, 2010 | 11:45 PM

JeffinTD

Extreme Pro Rider

Joined: Oct 2004

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If it is a Honda oversize piston, it may be stamped.

Otherwise, take a micrometer to the piston or bore.

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