{"id":19158,"date":"2023-06-02T08:00:00","date_gmt":"2023-06-01T23:00:00","guid":{"rendered":"https:\/\/www.decoboco.info\/en\/?p=19158"},"modified":"2026-09-24T13:46:12","modified_gmt":"2026-09-24T04:46:12","slug":"part-2-zephyr550-400-forced-decompression-secondary-air-pump","status":"publish","type":"post","link":"https:\/\/www.decoboco.info\/en\/20230602\/decoboco-cars\/zephyr550zr550\/part-2-zephyr550-400-forced-decompression-secondary-air-pump","title":{"rendered":"[Part 2] ZEPHYR550\/400 – Zephyr 550\/400 Crankcase “Forced Decompression” Secondary Air Pump Reuse – Great Results! \u266a"},"content":{"rendered":"\n
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A tip that may or may not be useful…
Any bike equipped with secondary air can do the same thing.

Just note that whether it passes emissions testing is a separate matter. <\/p>\n\n\n\n

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Kawasaki has a tube sticking out from the head cover.
The lack of a hose retainer clip is very Kawasaki-like… <\/p>\n\n\n\n

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The OEM uses a boldly unconventional hose which is a bit troublesome.
Ideally I should have made an adapter,

but since this silicone hose is so flexible, I just went ahead and installed it (*\u00b4\u03c9\uff40*) <\/p>\n\n\n\n

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And the pump isn’t even fixed in place – it’s free-floating.
What a great era we live in… ( *\u00b4\u8278\uff40) <\/p>\n\n\n\n

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I blocked the breather inside the air cleaner box with a well nut.
Rough and ready is fine. <\/p>\n\n\n\n

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Top of air cleaner box
The hole where the secondary air hose normally connects is blocked off with a collar. <\/p>\n\n\n\n

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Since the hose is blue, I wrapped it with braided tubing to tone it down a bit. <\/p>\n\n\n\n

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That’s the kind of modest work I did.
I haven’t ridden this bike yet so I can’t say for sure, but…

When I rev it, it spins up easily.
This is what forced decompression is all about!
It’s a low-cost way to have fun, so feel free to give it a try! <\/p>\n\n\n\n

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(\u00b4\u30fc\uff40) Whoooosh, she revs right up! <\/h2>\n\n\n\n
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\n\t\t\t\t\t\n\t\t\t\t\t\t\"\"\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\n\t\t\t\t\t\tBlowby Takeoff Adapter M30\/P1.5 \u03c614 Black 1953\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t\t\t
\u30c6\u30e9\u30e2\u30c8(TERAMOTO)<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\u00a56,397\t\t\t\t\t\t\uff082026\/09\/20 12:33\u6642\u70b9 | Amazon\u8abf\u3079\uff09<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\"\"\n\t\t\t\t\t\t\t\u53e3\u30b3\u30df\u3092\u898b\u308b<\/span>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\tAmazon\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\tRakuten\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\tYahoo!\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\"\"\n\t\t\t\t\t\u30dd\u30c1\u30c3\u30d7<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\n\n\n
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\n\t\t\t\t\t\n\t\t\t\t\t\t\"\"\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\n\t\t\t\t\t\tUxcell silicon vacuum tube heater hose 14 mm ID 1 m 101psi 392F blue reinforced high-temperature engine\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t\t\t
uxcell<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\u00a53,285\t\t\t\t\t\t\uff082026\/09\/19 10:33\u6642\u70b9 | Amazon\u8abf\u3079\uff09<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\"\"\n\t\t\t\t\t\t\t\u53e3\u30b3\u30df\u3092\u898b\u308b<\/span>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\tAmazon\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\tRakuten\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\tYahoo!\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\"\"\n\t\t\t\t\t\u30dd\u30c1\u30c3\u30d7<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t","protected":false},"excerpt":{"rendered":"

A tip that may or may not be useful… Any bike equipped with secondary air can do the same thing. Just note that whether it passes emissions testing is a separate matter.<\/p>\n","protected":false},"author":2,"featured_media":19149,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"pochipp_cv_data":"{\"a1b692a8\":{\"pv\":661,\"imp\":489,\"clickedOther\":11,\"clickedRakuten\":3,\"clickedAmazon\":4,\"clickedYahoo\":1},\"8d1d5ee5\":{\"pv\":661,\"imp\":407,\"clickedOther\":1}}","swell_btn_cv_data":"","footnotes":""},"categories":[41],"tags":[],"class_list":["post-19158","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-zephyr550zr550"],"_links":{"self":[{"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/posts\/19158","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=19158"}],"version-history":[{"count":0,"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/posts\/19158\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/media\/19149"}],"wp:attachment":[{"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/media?parent=19158"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/categories?post=19158"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.decoboco.info\/en\/wp-json\/wp\/v2\/tags?post=19158"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}