2 Strokes Down Under

Hi guys, I have just recently got back into messing around with two strokes. I have acquired a 1983 Yamaha YPVS RZ250. I need only 1 Piston for 1 of the 2 barrels,.... so I can get this bike running again. The piston I need is a Genuine Yamaha Rz250 piston 1st or 2nd oversize. I have 2 sets of cylin...