[Part 2] ZEPHYR550/400 – Zephyr 550/400 Crankcase “Forced Decompression” Secondary Air Pump Reuse – Great Results! ♪

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.

Kawasaki has a tube sticking out from the head cover.
The lack of a hose retainer clip is very Kawasaki-like…

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 (*´ω`*)

And the pump isn’t even fixed in place – it’s free-floating.
What a great era we live in… ( *´艸`)

I blocked the breather inside the air cleaner box with a well nut.
Rough and ready is fine.

Top of air cleaner box
The hole where the secondary air hose normally connects is blocked off with a collar.

Since the hose is blue, I wrapped it with braided tubing to tone it down a bit.

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!

(´ー`) Whoooosh, she revs right up!

テラモト(TERAMOTO)
¥6,397 (2026/09/20 12:33時点 | Amazon調べ)
  • Copied the URL !