Balancing Engine

You should be within the usable range on a relatively stock piston replacement, if you number the rods and caps, but if you replace any other components, you might consider it.

Be sure to check the stock balancer against true/ corrected TDC. Mark the balancer with masking tape and a pen, at .060" drop of the piston, before TDC, then again after TDC. Use a dial indicator on the block with a magnetic base. Then measure the distance between your marks, and find/ mark center. Rotate the crank back past it and come up to that mark in the correct rotational direction. That is true TDC. A lot of the balancers slip.