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 (11 months 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.