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I have a 81 polaris 440 engine that needs a cylinder. It's a fan cooled engine. The needle bearing cage broke and stuck a needle bearing on the side of the piston and cylinder. My options are either do an over bore or get a new cylinder. They only list a .020" over piston for this engine. Does anyone know if a 650 piston would work? They go oversized up to .050" and have the same bore/stroke if not could you tell me what other years of cylinders would fit? It's a EC44-2PM-3100 engine.
Thanks.
Thanks.