2008 Yamaha WaveRunner FX SHO / FX Cruiser SHO Service Manual, Page 227Get this manual
Crankcase, connecting rod, and piston
Piston ring check
1Measure: Piston ring dimensions and Out of specification Replace the piston rings as setPiston ring dimensions: Top ring a: B: 1.171.19 mm (0.04610.0469 in) T: 2.853.05 mm (0.1120.120 in) 2nd ring b: B: 1.171.19 mm (0.04610.0469 in) T: 2.602.80 mm (0.1020.110 in) Oil ring c: B: 2.372.47 mm (0.0930.097 in) (reference data): 2.50 mm (0.098 in)