Thread: XR650R Thread!
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Old 05-16-2013, 06:42 PM   #17044
cragdweller
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Joined: Jul 2012
Oddometer: 15
Detonation causes cracked pistons. Overheating can contribute to this, but I would look at fueling (both mixture and grade) and timing first. That piston died from detonation.
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