{"id":701,"date":"2013-07-20T15:08:47","date_gmt":"2013-07-20T23:08:47","guid":{"rendered":"http:\/\/atom.familjenjonsson.org\/blog\/?p=701"},"modified":"2017-02-25T18:36:01","modified_gmt":"2017-02-26T04:36:01","slug":"nc23-engine-noise","status":"publish","type":"post","link":"https:\/\/blog.familjenjonsson.org\/blog\/2013\/07\/20\/nc23-engine-noise\/","title":{"rendered":"NC23 Engine Noise"},"content":{"rendered":"<p>The NC23 has been making this ticking sound when first started when cold since I got it. It disappears after a minute or so. This might just be a bad exhaust gasket. It&#8217;s also clear the clutch bearing is going, because pulling the clutch in when cold often results in some quite unpleasant noises. That shouldn&#8217;t be a big deal, though.<\/p>\n<p>However, lately it&#8217;s started making a much worse-sounding, loud rattle around 3000RPM. This also goes away, or at least becomes much less noticeable, when the bike has warmed up properly. The sound is what I associate with piston slap, but I&#8217;m not sure what it is. It&#8217;s confined to a very narrow RPM range, it&#8217;s basically only there between 3000-3500 RPM. It largely goes away when the bike has warmed up properly.<\/p>\n<p>I tried recording the noise with my phone, but its microphone isn&#8217;t good enough to pick it up. I finally pulled out the Macbook with the high-quality Sennheiser USB microphone, which worked much better:<\/p>\n<p><iframe loading=\"lazy\" width=\"730\" height=\"411\" src=\"http:\/\/www.youtube.com\/embed\/vDel5Cnjm4M?feature=oembed\" frameborder=\"0\" allowfullscreen><\/iframe><\/p>\n<p>Any ideas what this might be? I first noticed it about a month ago and it got worse quite rapidly. Now it seems to have stabilized.<\/p>\n<p>There&#8217;s also a low-end rumble that I assume are the crankshaft or rod end bearings. I&#8217;d be fine rebuilding the engine and replacing the bearings, but I don&#8217;t want to do that until the NC30 is regularly rideable (and who knows how long that&#8217;ll take) so I hope it can go a little while longer.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The NC23 has been making this ticking sound when first started when cold since I got it. It disappears after a minute or so. This might just be a bad exhaust gasket. It&#8217;s also clear the clutch bearing is going, because pulling the clutch in when cold often results in some quite unpleasant noises. That &#8230;<\/p>\n<p><a href=\"https:\/\/blog.familjenjonsson.org\/blog\/2013\/07\/20\/nc23-engine-noise\/\" class=\"more-link\">Continue reading &lsquo;NC23 Engine Noise&rsquo; &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[4,30],"tags":[13,14],"class_list":["post-701","post","type-post","status-publish","format-standard","hentry","category-motorcycle","category-nc23","tag-motorcycles","tag-nc23"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/blog.familjenjonsson.org\/blog\/wp-json\/wp\/v2\/posts\/701","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.familjenjonsson.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.familjenjonsson.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.familjenjonsson.org\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.familjenjonsson.org\/blog\/wp-json\/wp\/v2\/comments?post=701"}],"version-history":[{"count":5,"href":"https:\/\/blog.familjenjonsson.org\/blog\/wp-json\/wp\/v2\/posts\/701\/revisions"}],"predecessor-version":[{"id":2032,"href":"https:\/\/blog.familjenjonsson.org\/blog\/wp-json\/wp\/v2\/posts\/701\/revisions\/2032"}],"wp:attachment":[{"href":"https:\/\/blog.familjenjonsson.org\/blog\/wp-json\/wp\/v2\/media?parent=701"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.familjenjonsson.org\/blog\/wp-json\/wp\/v2\/categories?post=701"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.familjenjonsson.org\/blog\/wp-json\/wp\/v2\/tags?post=701"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}