My Puch 175 SV motor refurbishment is coming along,I have acquired a barrel a good crankshaft from Austrian ebay sites.The barrels had a bore size of 44mm ,a size which are not stocked by either RBO Stockl or Weiser but after a few months of searching i came across a German engineer/dealer who had size 44mm Gerd Krauter and with all new bearings and seals. I was ready to insert the pistons into the barrels. Putting Puch pistons into barrels is a very precarious procedure if done in the normal manner ie barrel on top and get pistons in from underneath the barrel is heavy and very heavy if its a SGS barrel also you cant see all the piston in regards to ring position in relation to the piston pegs Result is very often broken rings !as i have found a few times.
But there is another fool proof way of getting them in place simply insert them into the barrels detached from the conrods you are doing one at a time you can see all around the piston hence no brokens rings! no stress! a bit like a hot knife through butter.
So pictures below will show the simple procedure
That,s the way to do it! the only problem is you need the motor out of the frame!