{"id":325,"date":"2020-06-25T19:48:06","date_gmt":"2020-06-25T19:48:06","guid":{"rendered":"https:\/\/advwisdom.com\/a\/?p=325"},"modified":"2020-06-25T19:49:40","modified_gmt":"2020-06-25T19:49:40","slug":"gs-speedo-fix","status":"publish","type":"post","link":"https:\/\/advwisdom.com\/a\/gs-speedo-fix\/","title":{"rendered":"GS Speedo Fix"},"content":{"rendered":"<p><strong>GS Speedometer Accuracy Fix Thread<\/strong><\/p>\n<p style=\"text-align: left;\">I just installed a speedo hub from the R1100R. It has a 2.875 ratio, compared to the 3.0 ratio stock on the Oilhead GS. The changeover is quick, under 15 minutes including cleaning your hands afterwards. Bottom line: it works just fine, and my speedometer is now *much* more accurate.<\/p>\n<p>Here are some data for 6th gear:<\/p>\n<p>Tires: Metzler Tourance<br \/>\n38.5 rear, 35.5 front, cold pressures<\/p>\n<p>With 3.0 speedo hub,<br \/>\n3000 RPM 65 mph indicated, 60.8 actual, 6.9% error<br \/>\n3500 RPM 75 mph indicated, 70.0 actual, 7.1% error<br \/>\n4000 RPM 85 mph indicated, 79.2 actual, 7.3% error<\/p>\n<p>With 2.875 speedo hub,<br \/>\n3000 RPM 62 mph indicated, 61.2 actual, 1.3% error<br \/>\n3500 RPM 71 mph indicated, 70.0 actual, 1.4% error<br \/>\n4000 RPM 80 mph indicated, 79.0 actual, 1.3% error<\/p>\n<p>I used a Magellan 315 GPS on flat straight sections of freeway at steady throttle to allow the GPS time to settle. Obviously, my data collection technique is imperfect, it&#8217;s hard to read the analog speedometer and the digital GPS at the same time while avoiding trucks and SUVs. The GPS is only accurate at steady speeds on straight roads.<\/p>\n<p>The part number from BMW is 62 12 2 306 532. Maybe you&#8217;ll find it for less than I paid&#8230; but it&#8217;s worth it for peace of mind.<\/p>\n<p>Now I&#8217;m happy, a 1.4% error is much better than a 7% error. If I were buying a new GS, I would demand that the dealer include the speedo hub from the old Roadster in the package, out the door. It&#8217;s absurd that BMW gets away with selling bikes with inaccurate speedometers.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>GS Speedometer Accuracy Fix Thread I just installed a speedo hub from the R1100R. It has a 2.875 ratio, compared to the 3.0 ratio stock on the Oilhead GS. The changeover is quick, under 15 minutes including cleaning your hands afterwards. Bottom line: it works just fine, and my speedometer is now *much* more accurate. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"https:\/\/advwisdom.com\/a\/wp-json\/wp\/v2\/posts\/325"}],"collection":[{"href":"https:\/\/advwisdom.com\/a\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/advwisdom.com\/a\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/advwisdom.com\/a\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/advwisdom.com\/a\/wp-json\/wp\/v2\/comments?post=325"}],"version-history":[{"count":2,"href":"https:\/\/advwisdom.com\/a\/wp-json\/wp\/v2\/posts\/325\/revisions"}],"predecessor-version":[{"id":327,"href":"https:\/\/advwisdom.com\/a\/wp-json\/wp\/v2\/posts\/325\/revisions\/327"}],"wp:attachment":[{"href":"https:\/\/advwisdom.com\/a\/wp-json\/wp\/v2\/media?parent=325"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/advwisdom.com\/a\/wp-json\/wp\/v2\/categories?post=325"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/advwisdom.com\/a\/wp-json\/wp\/v2\/tags?post=325"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}