YAMAHA TY250/350 MONO 84-92 SWINGING ARM CHAIN SLIPPER 38V-22147-10

GENUINE Swinging Arm Chain Slipper / Protector 38V-22147-10
 These fit all years and models of the Yamaha TY250 & 350 Air Cooled Mono Bikes 1984-92. 
Number 12 on the Parts Diagram