This is a new ProX piston kit for the Vintage 1982-83 Yamaha YZ-80. The kit is supplied with standard size 46.95mm piston, ring, wrist pin, clips.  This piston fits the 47mm standard bore size. 
Identification Help; 
Yamaha YZ-80 1982 Cylinder Marks : 5X2
               YZ-80 1983 Cylinder Marks: 22W
ProX pistons are the best original replacement parts available.
Always great quality for reliable running engines. 

A qualified mechanic is required to check your cylinder, measure the bore size and install the piston, cylinder to the bottom end.
Check your cylinder size before you purchase , a re-stocking fee applies.

Keep your Vintage Yamaha YZ80 running with this new piston kit.
Note: Picture is for reference and is the exact model, you will receive this kit when ordering.