I found I could get the Honda 070PZ-ZY30100SCS Service Connector for less money at a Honda marine dealer...
070PZ-ZY30100 HONDA SCS SRVCE CONNECT0R (Honda Code 7060437) $18.06
the SCS Service connector plugs into the diagnostic port to allow you to read codes in memory. Without it you can only read any current codes by putting the bike in neutral with the engine running and the sidestand down. Both of these methods only read the major code. Once you have the flash code, you can look it up in the manual and get some diagnostic help with a malfunction. To read the minor code, you need the Honda diagnostic reader which costs over $3,000 and has a subscription cost of $800 per year. In other words, forget it.
070PZ-ZY30100 HONDA SCS SRVCE CONNECT0R (Honda Code 7060437) $18.06
the SCS Service connector plugs into the diagnostic port to allow you to read codes in memory. Without it you can only read any current codes by putting the bike in neutral with the engine running and the sidestand down. Both of these methods only read the major code. Once you have the flash code, you can look it up in the manual and get some diagnostic help with a malfunction. To read the minor code, you need the Honda diagnostic reader which costs over $3,000 and has a subscription cost of $800 per year. In other words, forget it.