2005 Kawasaki STx-12F Jet Ski Factory Service Manual., Page 177Get this manual
ENGINE TOP END 6-9 Special Tools and Sealant
Valve Seat Cutter, 45 57001-1187 30: Valve Seat Cutter, 55 -1 35 :
Valve Spring Compressor Adapter, 70 1- 20 2
Compression Gauge Adapter, M10 1.0: -1 7