18 and newer bikes are easier to install the oem socket. Honda revised the harness and plug in location. Plus it cost less for the newer bikes. It was a pain in the ass to install on my 17. The whole front end of the bike had to come apart to access the hidden plug in behind the gauges. Mine said 2 amp rated on the provided warning sticker but it had a 7.5 amp fuse in the fuse holder on the provided harness. I'm not about to test that out because if the fuse pops I'll have to take to whole bike apart again to access the fuse location. Stupid design on the 16-17 model bikes IMO.