Piston problems

BrandonG said:
No its a bikeberry flyin horse. What type of an imperfection? Mine looks ok but Im not sure what to look for
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The inside of the rod small end is also the bearing race. Mine had a spot near the edge where it wasn't perfectly round. I can't say for sure if it was made that way, or if the first bearing failure caused it.

Since it's a Flying Horse, a rebuild with be extra difficult, because flying horse motors have a lot of unique parts. One being japanese small end bearings which shouldn't cause this problem. That points to something else being the cause, like the rod.

Other unique parts are the cylinder, and piston.
 
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