Mark Scrivener· Premium Member
Discussion Starter · #1 ·
My Aster Alisan Shay uses "Graphited Yarn" for piston rings and as a substitute for O rings on the throttle and blower valve. The valves are less of a problem as I could always cut an O-ring grove. But for the pistons one needs a good seal and low drag. Any suggestions? Where does one find "graphited yarn" and what other materials would work for piston rings?