2004-2007 Honda Aquatrax ARX1200N3/T3/T3D Factory Service Manual, Page 304Get this manual
CYLINDER HEADVALVE
CYLINDER COMPRESSION
Start the engine according to the flushing procedure (page 5-2) and warm it up for several minutes at idleTurn off the water and stop the engineRemove all the direct ignition coils and spark plugs (page 4-7)Remove the storage box (page 3-8) and disconnect the fuel pump 5P (gray) connector
5P CONNECTOR
Install the compression gauge into the spark plug holeTOOL: Compression gauge attachment 07RMJ-MY50100 or equivalent commercially available in U.S.A(Snapon, EEPV308A)
COMPRESSION GAUGE