Formula: Displacement = (((bore x bore) /# of pistons) x 3.141593 x stroke x # of pistons) / 1000)

FZR400
56.00mm x 40.50mm = 399.01cc STOCK
57.00mm x 40.50mm = 413.38cc (+1mm bore)
58.00mm x 40.50mm = 428.02cc (+2mm bore)
59.00mm x 40.50mm = 442.90cc (+3mm bore = FZR600 pistons)

FZR600
59.00mm x 54.80mm = 599.29cc STOCK
60.00mm x 54.80mm = 619.77cc (+1 mm bore)
61.00mm x 54.80mm = 640.60cc (+2mm bore)
62.00mm x 54.80mm = 661.78cc (+3mm bore)

YZF600
62.00mm x 49.60mm = 598.98cc STOCK
63.00mm x 49.60mm = 618.46cc (+1mm bore)
64.00mm x 49.60mm = 638.25cc (+2mm bore)
65.00mm x 49.60mm = 658.35cc (+3mm bore)

Hybrid FZR600 crank w/ YZF600 pistons
62.00mm x 54.80mm = 661.78cc STOCK
63.00mm x 54.80mm = 683.30cc (+1mm bore)
64.00mm x 54.80mm = 705.16cc (+2mm bore)
65.00mm x 54.80mm = 727.37cc (+3mm bore)

-cad600