2008 Yamaha WaveRunner FX SHO / FX Cruiser SHO Service Manual, Page 235Get this manual
Crankcase, connecting rod, and piston 2Select: Crankshaft main journal bearing
Selecting steps: 1Check the crankcase journal size number on the crankcaseNOTE: If the crankcase journal sizes are the same at all positions, the size number is stamped only at the "J1" positionExample: If "J1""J5" are different:
J1 J2 J3 J4 J5 55545
J1 J2 J3 J4 J5
If "J1""J5" are the same:
J1 J2 J3 J4 J5 55555