Hi i had 2 rec/reg go and had to replace my wireing loom,i was just out the warrenty i done only 6000 miles.It look like the earth wire and melted in main wire loom, so i would check this and i have now put a cover to shop all the road crap ect get at the Rec/reg.
I try to get a answer of Yamaha but know one seems to why this keeps happening? my is 09 xt660z and i had spayed all the main connect ect .
hope your trip gos well .