I am dealing with the same problem rear lights and cluster out. Replaced the 10A fuse for that circuit and its fine. I can find any issues with my wiring. I believe others have had this problem and I am thinking the only active component in that circuit is the turn signal relay. I am going to run it for a while and see if it blows again....something caused it to blow in the first place.
2004 RC51 Nicky Hayden, PCMIII, Sato-Low Mount
1994 FZR600, KTMSXC625 Thumper, Honda Metro, 150cc Puma