{"id":30573,"date":"2021-12-05T19:44:41","date_gmt":"2021-12-05T10:44:41","guid":{"rendered":"https:\/\/www.decoboco.info\/en\/?p=30573"},"modified":"2026-09-24T13:45:28","modified_gmt":"2026-09-24T04:45:28","slug":"yamaha-sumitomo-mos-caliper-oh","status":"publish","type":"post","link":"https:\/\/www.decoboco.info\/en\/20211205\/everyday-events\/yamaha-sumitomo-mos-caliper-oh","title":{"rendered":"Yamaha Sumitomo MOS Caliper OH"},"content":{"rendered":"
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I picked up an MOS caliper for future reference.

The cap is Pentalobe\u2014now that’s a puzzle. Why? There’s no special tool setting for it.
What do we do about the O-ring here? <\/p>\n\n\n\n

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Tools are available for sale, but I probably won’t be using them going forward.
I welded stainless steel rods into a V-shape and milled two flats to make a simple homemade tool (‘\u03c9’)\u30ce<\/p>\n\n\n\n

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If you make three contact points fit perfectly, it should come off! <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Well, since it’s a machined hole, maybe the message is don’t remove it? <\/p>\n\n\n\n

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So it’s 27\u201330 mm.
Brembo is 30\u201334 mm, so this is about 10% smaller. There must be a reason behind those specific numbers. <\/p>\n\n\n\n


<\/p>\n\n\n\n

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I really like the design of this MOS caliper, but it seems it doesn’t appeal to the general public. <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Monoblock, aluminum caliper, reliable seal supply
… Am I the only one who thinks it surpasses Lockheed (AP Racing) in every way? <\/p>\n\n\n\n

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With 100 mm pitch, it can also fit the Inazuma 1200.
I haven’t fully checked the right offset yet, so I can’t say for certain, but this seems like an interesting option too. <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

I always find myself thinking of Sponden calipers…
You don’t know them? Well, that’s fine too in this modern age. <\/p>\n","protected":false},"excerpt":{"rendered":"

I picked up an MOS caliper for future reference. The cap is Pentalobe\u2014now that’s a puzzle. Why? There’s no special tool setting for it. What do we do about the O-ring here?<\/p>\n","protected":false},"author":2,"featured_media":30563,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"pochipp_cv_data":"","swell_btn_cv_data":"","footnotes":""},"categories":[1924],"tags":[279],"class_list":["post-30573","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-everyday-events","tag-caliper-oh"],"_links":{"self":[{"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/posts\/30573","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/comments?post=30573"}],"version-history":[{"count":0,"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/posts\/30573\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/media\/30563"}],"wp:attachment":[{"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/media?parent=30573"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/categories?post=30573"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/tags?post=30573"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}