K321 rebuild / vibration - Only Cub Cadets

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K321 rebuild / vibration

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06-23-2026, 03:05 PM

Enosgl

New Member

Join Date: Oct 2021

Location: IL

Posts: 5

K321 rebuild / vibration

Hi all,

I am a very experienced engine rebuilder, having been in the business years ago. I just completed a rebuild on a 1450 with available, ie, aftermarket parts. No complaints, seems to be of decent quality, all went together well, and runs well. One thing I did NOT do is weigh the replaced components against the weight of the new parts. The wrist pin wall was thicker, but I assume the aftermarket manufacturer's piston was perhaps lighter than OEM and the combined reciprocating weight is similar. Has anyone else experienced this? Engine runs good on the floor, but does vibrate a bit. I know the Quiet Line CC tractors were not counter balanced which is why they use rubber mounts, but how much is normal? Trying to not overthink it, but don't want to complete the install just to take it out and change a wrist pin. Many thanks!

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