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Old 08-26-2011, 01:54 PM   #39285
ScienceOfDirt
U-Boat Rider
 
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Joined: May 2010
Location: Snowbelt/Rustbelt of Northeast Ohio
Oddometer: 1,668
Quote:
Originally Posted by mgorman View Post
Looks like a combo deal, not enough oil & gas. The mechanicals are an oil deficiency but the holed piston is usually caused by a lean condition. 1st thumper I've seen hole a piston, I usually see 2 strokes doing that.
I haven't had 4-strokes bikes long enough to know for sure, but I don't think that was a lean burn through. It doesn't look melted, it looks like something hit it.
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