Thread: 2009 ktm 400xcw
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Old 11-17-2012, 08:39 PM   #10
Beastly Adventurer
Joined: May 2008
Location: Kenmore, Washington
Oddometer: 1,211
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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