{"id":4010,"date":"2017-11-04T10:55:16","date_gmt":"2017-11-04T14:55:16","guid":{"rendered":"http:\/\/192.168.50.23\/wordpress\/?p=4010"},"modified":"2018-04-07T16:19:37","modified_gmt":"2018-04-07T20:19:37","slug":"dissecting-a-failed-triumph-bonneville-starter","status":"publish","type":"post","link":"https:\/\/forths.com\/index.php\/2017\/11\/04\/dissecting-a-failed-triumph-bonneville-starter\/","title":{"rendered":"Dissecting a Failed Triumph Bonneville Starter"},"content":{"rendered":"<p>When the starter failed on my 2014 Triumph Bonneville T100 after only 6700 miles, I searched online for a new replacement.\u00a0 The part is made by Denso and is similar to many new motorcycle starters priced under $100.\u00a0 After seeing some Triumph dealers listing the part for over $900, a completely ridiculous price, I picked up a used one on eBay for $90.\u00a0 Given the high prices for these starters, I decided to disassemble the original starter to determine what failed and whether it could be rebuilt and put on the shelf.\u00a0 The video below shows my failed starter, which could barely spin and sounded like a steam engine.<\/p>\n<p><iframe loading=\"lazy\" width=\"735\" height=\"551\" src=\"https:\/\/www.youtube.com\/embed\/R7lwE412LCA?feature=oembed\" frameborder=\"0\" allow=\"autoplay; encrypted-media\" allowfullscreen><\/iframe><\/p>\n<p>When I remove the two screws holding the starter together, smelly black oil poured out.\u00a0 That wasn&#8217;t a good sign.\u00a0 The starter mounts directly the the Triumph engine, which itself has oil inside.\u00a0 To keep the oil inside the engine, there are two seals.\u00a0 The first is a simple O-ring around the starter flange, but since oil wasn&#8217;t seeping onto the ground, that O-ring performed as expected.\u00a0 The second is a shaft seal that prevents the engine oil from entering the starter.\u00a0 Apparently oil got past this seal, but why?\u00a0 There could be a few possibilities, such as seal failure, damage to the starter shaft, a failed bearing, or excessive crankcase pressure.\u00a0 Regardless, this inexpensive seal, and the exterior O-ring, will be replaced.<\/p>\n<p>The good news is that the armature tested good &#8211; no open or shorted circuits.\u00a0 The brushes are also in good condition &#8211; not surprising given the low mileage of the motorcycle.\u00a0 I&#8217;ll order a new seal and O-ring then put the starter back together and test it.\u00a0 If it passes the test, it will go on the shelf as a spare part.<\/p>\n<div id='gallery-1' class='gallery galleryid-4010 gallery-columns-3 gallery-size-thumbnail'><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/forths.com\/wp-content\/uploads\/2017\/11\/rsIMG_20171104_092029.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"200\" src=\"https:\/\/forths.com\/wp-content\/uploads\/2017\/11\/rsIMG_20171104_092029-200x200.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-4012\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-4012'>\n\t\t\t\tAn oily mess where no oil should be\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/forths.com\/wp-content\/uploads\/2017\/11\/rsIMG_20171104_092036.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"200\" src=\"https:\/\/forths.com\/wp-content\/uploads\/2017\/11\/rsIMG_20171104_092036-200x200.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-4013\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-4013'>\n\t\t\t\tThe armature is coated in smelly burned oil\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/forths.com\/wp-content\/uploads\/2017\/11\/rsIMG_20171104_095450.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"200\" src=\"https:\/\/forths.com\/wp-content\/uploads\/2017\/11\/rsIMG_20171104_095450-200x200.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-4015\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-4015'>\n\t\t\t\tThe likely culprit is a failed seal\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/forths.com\/wp-content\/uploads\/2017\/11\/rsIMG_20171104_095302.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"200\" src=\"https:\/\/forths.com\/wp-content\/uploads\/2017\/11\/rsIMG_20171104_095302-200x200.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-4014\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-4014'>\n\t\t\t\tThe O-ring did its job\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/forths.com\/wp-content\/uploads\/2017\/11\/rsIMG_20171104_104841.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"200\" src=\"https:\/\/forths.com\/wp-content\/uploads\/2017\/11\/rsIMG_20171104_104841-200x200.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-4011\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-4011'>\n\t\t\t\tCleaned parts ready for reassembly\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>When the starter failed on my 2014 Triumph Bonneville T100 after only 6700 miles, I searched online for a new replacement.\u00a0 The part is made by Denso and is similar &hellip; <\/p>\n","protected":false},"author":2,"featured_media":4012,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","footnotes":""},"categories":[3],"tags":[142,141],"class_list":["post-4010","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-projects","tag-starter","tag-triumph-bonneville"],"_links":{"self":[{"href":"https:\/\/forths.com\/index.php\/wp-json\/wp\/v2\/posts\/4010","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/forths.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/forths.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/forths.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/forths.com\/index.php\/wp-json\/wp\/v2\/comments?post=4010"}],"version-history":[{"count":3,"href":"https:\/\/forths.com\/index.php\/wp-json\/wp\/v2\/posts\/4010\/revisions"}],"predecessor-version":[{"id":4058,"href":"https:\/\/forths.com\/index.php\/wp-json\/wp\/v2\/posts\/4010\/revisions\/4058"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/forths.com\/index.php\/wp-json\/wp\/v2\/media\/4012"}],"wp:attachment":[{"href":"https:\/\/forths.com\/index.php\/wp-json\/wp\/v2\/media?parent=4010"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/forths.com\/index.php\/wp-json\/wp\/v2\/categories?post=4010"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/forths.com\/index.php\/wp-json\/wp\/v2\/tags?post=4010"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}