Imola Piston

[Jeff T]

Started to fit the kit but the piston is bottoming out ever so slightly at the bottom of the stroke, I've fitted a 60mm crank could I have the wrong pistons or are they the same length.

[Ian Hepworth]

Started to fit the kit but the piston is bottoming out ever so slightly at the bottom of the stroke, I've fitted a 60mm crank could I have the wrong pistons or are they the same length.

It probably will bottom out, with a 60mm crank the piston goes down 1mm further and up 1mm further. You can fit thicker base gaskets and or shorten the piston but you need to keep an eye on port timings etc.