Dielectric grease if your friend. I use it on every connector on the bike. I pack the connectors, put them together, and wipe off the excess. Use on the HT connectors, spark plug boots, fuses, etc. There's lots of connectors on these bikes, and every one of them needs to be touched.
On my 2010, most of the connectors were done at the factor with dielectric grease. On our 2007, I had to do more of them.
I just went throught the bike front to back, starting at the headlight shell. Don't forget the starter cables, starter solenoid, battery, oil pressure sender, rear brake switch, etc.
HTH,
H.
