Nostalgic… I looked up the DYNOJET website and sent them an inquiry. ZEPHYR550/400

The Dynojet carburetor inner kit was quite the sensation back then, wasn’t it?

At the time, I didn’t really understand the principle, but
“install it and get a performance boost” it was this amazing thing.

Well, I definitely got the impression that the response became snappier.
Since it enlarges the slide valve by drilling,
“no back gear”

you need to get a used one on Yahoo Auctions.


Dynojet: Powersports Vehicle Parts

You can narrow down by manufacturer/year/model from here and check the lineup.
It really gets your imagination going, doesn’t it?

But if you try to use it with an air cleaner box attached,
fine-tuning is a hassle, so it’s a bit of a drag.

And
as expected, there was no GSX1200 (;∀;)
Of course not…
I’ll do a bit more searching.

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