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Old 03-27-2019, 09:30 AM   #3
Off the deep end
MichaelFZ1's Avatar
Join Date: Jun 2017
Location: Georgia Piedmont
Posts: 1,435
Originally Posted by okrider View Post
I had a similar issue where one of the coils would die. Figured out that it was the day after the bike got wet. If I rode in rain or washed the bike, next day, one coil would go out.

Turns out it was a coil wire. It had been touching the radiator fan and was exposed. Couldn't see it at first because I change the coils from the left side of the bike and the wire was cut on the right side. Put some electric tape. No issues since.
Was just about to suggest this, and upon refresh, here it is!

Yamaha lists the coil harness as a separate part number, and although Iíve never removed it, this leads me to believe that you can. May be worth thoroughly checking it out.
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