Quote:
Originally Posted by dhgeyer
Thrown rod comes to mind, or broken/jammed cam chain leading to valves getting beaten to a pulp. I'm guessing it's unlikely to be a transmission problem, as the total failure occurred with the clutch disengaged.
Whatever happened, it is likely that some kind of lubrication issue brought it on. I say likely, not certain.
Sorry to hear this happened to you. By the sound of it, it won't be an easy fix.
One possibility to keep in mind is keeping an eye on Ebay and Craigslist for someone parting out a GZ250, and getting a replacement engine/transmission. You might get lucky.
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Thanks, dhgeyer! Do you know what causes, a "thrown rod"? The weird thing was that it kept running with all this noise happening for about 10 seconds or so. I would think that if a valve was broken up, it would start running rough, or stall, but it kept running. I don't know.