As some may know this alternator o-ring for '84 through '87 bikes is unavailable through Yamaha :ireful:
(http://i208.photobucket.com/albums/bb37/campsimonette/photo%204_zps6vaco7gp.jpg) (http://s208.photobucket.com/user/campsimonette/media/photo%204_zps6vaco7gp.jpg.html)
(http://i208.photobucket.com/albums/bb37/campsimonette/Capture_zps6m6mj35y.png) (http://s208.photobucket.com/user/campsimonette/media/Capture_zps6m6mj35y.png.html)
Which probably isn't all bad, because for $30 Yamaha should be ashamed... :ireful: :mad:
My old one of 31 years developed a cross section that looked like this and seemed to have developed a leak
(http://i208.photobucket.com/albums/bb37/campsimonette/o_ring_zpswxcloqrh.png) (http://s208.photobucket.com/user/campsimonette/media/o_ring_zpswxcloqrh.png.html)
Original one is on the left:
(http://i208.photobucket.com/albums/bb37/campsimonette/closer_zpskmv0vawa.jpg) (http://s208.photobucket.com/user/campsimonette/media/closer_zpskmv0vawa.jpg.html)
I found a replacement and will see how it works :good2: It's National O-Ring item 235.
https://www.fastenal.com/products/details/66868 (https://www.fastenal.com/products/details/66868)
http://www.oreillyauto.com/site/c/detail/NAT0/235/N0243.oap?ck=Search_N0243_-1_-1&pt=N0243&ppt=C0142 (http://www.oreillyauto.com/site/c/detail/NAT0/235/N0243.oap?ck=Search_N0243_-1_-1&pt=N0243&ppt=C0142)
http://www.grainger.com/product/GRAINGER-APPROVED-O-Ring-1KLG2 (http://www.grainger.com/product/GRAINGER-APPROVED-O-Ring-1KLG2)