Thread: 2009 ktm 400xcw
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Old 11-17-2012, 08:39 PM   #10
WetSideRider
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Joined: May 2008
Location: Kenmore, Washington
Oddometer: 1,086
On my Husaberg 390 (same piston) the size was stamped on the piston. As stated above, you don't bore the cylinder, you replace like rings or ring and piston kit.
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