MOPED ARMY

Your stroke won’t change. Your kit spacing will change. That’s it. Port timing will be funky until you mess with base gaskets. Putting this on a puch with the metra 65 may help with its deck issues. Otherwise installing a long rod on an un stroked Crank is pretty much a waste

The piston pin is oversized on the swing crank, that’s the way they were able to stroke it. I don’t think it would work in a z50 without boring the crank pin holes.

You don’t get the idea of a 1mm stroker crank, it’s not the conrod that’s any longer,

A 1mm longer stroker crank means the crank big end conrod bearing is offset 1/2mm more to the outside of the crank lobes then stock so the conrod moves 1/2mm farther down and 1/2mm up equaling 1mm more stroke, it uses the same length Conrod Not a longer one

By just using a longer conrod in a stock sized crank the stroke will be the same but the port timing will be different because the piston will sit up 1 mm higher then stock in the cylinder instead of 1/2 a millimeter lower then stock like what you want because most cylinders and kits are made wrong,

They really need to come out with a 2 mm millimeter stroker crank with the crank pin offset 2 millimeters because that would be a millimeter each way and that would be close to being enough to fix some of these wrong height cylinders That require large amount of base spacing and then decking of the cylinder

This is the 1mm longer (+1mm) crank I believe but I’m not very good at Dutch language

https://www.mofakult.ch/puch/kurbelwelle/maxi-1-gang-kurbelwellen/swiing-kurbelwelle-high-end-1-mm-hub-puch-maxi-e50

I don’t know how you could take it apart and put it on a Z 50 (edited)