I have a 2011 with approximately 48k miles and found a corroded under the left headlight ground block (S7). My problem (no headlight, turn signals, windscreen movement, heated grips & indicator lights on) started last April on a ride from Seattle to Houston via the PCH and since I felt headlights, turn signals, etc. are important I stopped at a Yamaha dealer near Victorville, California (nice folks and took me in right away I would add). The tech couldn't find anything wrong but contacted Yamaha support who told him to replace the "starter cut-off relay" or often called "relay"; P/N 5VK-81950-30. Of course, relay wasn't in stock so confident that the rest of the bike was okay I continued my trip. After arriving in Houston, I replaced the relay. Everything worked fine for another thousand miles. However, the problem re-appeared. This time I researched the forum and decided to inspect all the ground blocks (or spiders). All were in good condition except for under the left headlight. Consequently, for the ones in good condition, I filled them with dielectric grease and the corroded one I removed, split the five or six wires into two heavy (14 gauge?) which routed to the negative terminal of the battery. I'm pleased to report that everything works fine and would like to thank this forum for wonderful tips and guidance. I also want to add that I'm a bit disappointed with Yamaha engineering on this particular issue. Grounding circuits shouldn't be an issue; this is well understood science and a lot of motorcycles get this right. Ride safe.
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