Inliners International Forums General Discussion Hi Performance Help to Compression and Piston issue

You might try pulling all the pistons and remove them from the rods. Then using a deck gauge, slip the piston pin out just a speck and measure the piston from the top of the piston to the top of the pin. That ought to tell you whether it's the pistons. If they all come up to speck, then you will move to the rods and measure the rods to make sure they were not machined wrong, i.e., not all the same length.Then I think you are down to checking the crank throws to make sure the crank throws are equal and the crank is properly spaced apart degree wise, 120 degrees.