This is a replacement YS Piston & Liner, and is intended for use with the YS 91SR engine.
This product was added to our catalog on June 21, 2010
Thursday, Nov 26 2020 (about a year ago)
YS Engines Piston & Liner
my YS91 SR would not start after lean run from plugged filter.GUY on forum replaced liner/piston/ring with same issue and started rite up.Did same and mine fired rite up too. Very happy!!! kit comes with ring!Check your rear main bearing too.