{"id":27385,"date":"2022-06-07T08:00:00","date_gmt":"2022-06-06T23:00:00","guid":{"rendered":"https:\/\/www.decoboco.info\/en\/?p=27385"},"modified":"2026-09-24T13:45:56","modified_gmt":"2026-09-24T04:45:56","slug":"episode-11-inazuma-1200-bito-rd-hollow-chromoly-axle","status":"publish","type":"post","link":"https:\/\/www.decoboco.info\/en\/20220607\/decoboco-cars\/inazuma-1200\/episode-11-inazuma-1200-bito-rd-hollow-chromoly-axle","title":{"rendered":"Episode 11 \u3010Inazuma 1200\u3011 Super cool? Installing a BITO R&D hollow chromoly axle"},"content":{"rendered":"
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This Inazuma 1200 series.
There’s quite a lag between when we do the work and when we post it to the blog, so I often forget things.
I’ll try to post without forgetting as much as possible… Please enjoy this self-satisfied world! <\/p>\n\n\n\n\n\n\n\n

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Super beautiful chromoly shaft
BITO R&D made (for GSF1200). It won’t fit directly, so you might be tempted to click buy… but you shouldn’t. <\/p>\n\n\n\n

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JB-POWER hollow chromoly axle shaft 671-03-011<\/a><\/p>\n\n\n\n

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Beautiful finish and stable pricing. If you can choose a BITO R&D shaft, I’d recommend it! <\/p>\n\n\n\n

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So, the top is the Inazuma 1200 and the bottom is the GSF1200 (BITO R&D).

To be precise, the fork span is 200mm (GSF1200) and 205mm (Inazuma 1200), so the shaft is 2.5mm shorter on each side\u2014it goes in a bit.
However, the wrench grips firmly, so we’ve confirmed there’s no problem. <\/p>\n\n\n\n


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The GSF1200 and others use a stepped shaft.
The Inazuma 1200 uses a sleeve to make it stepped.

By swapping the shaft…
\u30fbWeight reduction (both the shaft and your wallet)
\u30fbParts count goes from 2 to 1
\u30fbAnd the looks become beautiful too
(*\u00b4\u03c9\uff40*) <\/p>\n\n\n\n

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I don’t really like measuring weight, but since people ask, I’ll measure it reluctantly.
780g to 420g…
Wow, that’s a dramatic change. It’s about the weight of one plastic bottle, so that’s significant. <\/p>\n\n\n\n

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The Inazuma 1200 is the odd one out among the oil-cooled 1200 series\u2014it’s such a pain.

The front axle diameter is 20\u03c6, which is common, but only the threaded part is one step thinner…
It definitely looks like it’s borrowed from something else. <\/p>\n\n\n\n

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The Inazuma 1200 bottom case needs to be machined to M20-P1.5. <\/p>\n\n\n\n

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We took it to the machine shop and it was done in seconds. <\/p>\n\n\n\n

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The fork assembly is complete, and the shaft slides in smoothly by hand\u2014it feels really good. <\/p>\n\n\n\n

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It’s p-e-r-f-e-c-t (*\u00b4\u03c9\uff40*) \u266a <\/p>\n\n\n\n

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The wheel area lubrication situation where the bonito-flake culture never fades…
It’s just plain dirty, so I really wish people would stop doing it ( \uff9f\u0414\uff9f) <\/p>\n\n\n\n

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Rather than lubing those spots, if you’d properly lubricate the areas that move and rub, everyone would be happy. <\/p>\n\n\n\n

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That’s how it becomes noticeably lighter and the quality improves.

*By the way, we don’t do this as a service, so please understand… Go have a custom shop do it for you. <\/p>\n","protected":false},"excerpt":{"rendered":"

This Inazuma 1200 series. There’s quite a lag between when we do the work and when we post it to the blog, so I often forget things. I’ll try to post without forgetting as much as possible… Please enjoy this self-satisfied world!<\/p>\n","protected":false},"author":2,"featured_media":27363,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"pochipp_cv_data":"","swell_btn_cv_data":"","footnotes":""},"categories":[39],"tags":[257,443,442,400,120],"class_list":["post-27385","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-inazuma-1200","tag-inazuma-1200","tag-inazuma-1200-bumpy","tag-inazuma-1200-decoboco","tag-inazuma-1200-oil-cooled-katana","tag-oil-cooled-katana"],"_links":{"self":[{"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/posts\/27385","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=27385"}],"version-history":[{"count":0,"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/posts\/27385\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/media\/27363"}],"wp:attachment":[{"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/media?parent=27385"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/categories?post=27385"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/tags?post=27385"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}