Ring Types

This page is to help folks figure out which rings they are in need of. There are actually 3 different kinds, The GI, the FG, and the "L" ring. Above is an example of the GI and FG. They depict the area of the ring where the 2 sides join together on the piston. The GI "flaps" shown above actually cover the round pin that is in the piston to align the ring. The FG flaps go around the side of the pin. The "L" ring, when looked at from a cross section point of view, will be shaped like the letter "L". Puch's and a couple other models use this type of ring. On the Puch's that use the "L" ring,  you will have 1 "L" ring, and one FG ring. So, if you have the piston, and do not have the original rings, look at the piston ring sleeves, and if there are 2 different sleeves, then the "L" ring will be the top ring. 

The find out which size of ring you need, the 1.5mm or the 2.0mm height, measure the ring sleeves' thickness from the top of the ring sleeve, to the bottom of that same sleeve.