Also make sure the piston is on correctly, with the ring gaps toward the intake...
William.. you mean the wrong ring in each groove ?? Because i never knew each ring could have a top and bottom. Please let me know. Always trying to learn more.
I will second this and bet thats what it is. If they are installed upside down they wont close all the way.
It's definitely worth checking out, but I can not imagine been able to insert the piston into a cylinder like that in the first place!
It would have been pretty tough fit and probably broken the ring ends?
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