Radius Rod Retaining Plate ties the center four rod ends together.
$5.00
11-139 Bushing, Spindle Insert, Steel, 5/8″ x 2 1/8″ x 3/8″ ID
Piston Pin Clip, Polaris OEM 3083839, each.
Bearing, Piston Pin
Piston Kit, 500cc, Standard, SP1