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Author Topic: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)  (Read 49763 times)

Offline Nebr_Rex

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #180 on: Dec 03, 2016, 20:50:31 »
Something to do with this.

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Offline Nebr_Rex

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #181 on: Dec 03, 2016, 20:56:48 »
Need something like this, but smaller.
I have a solution rattling around in my head.

Offline Nebr_Rex

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #182 on: Oct 30, 2017, 00:31:56 »
A little thing called life had gotten in the way of some of my projects.
I was having trouble with the stock carbs leaking when  the fuel valve was open.
If the Keihins needle and seat are the problem I may have to switch to BS34s.
So I installed my standby 29 smoothbores. I will be doing some testing on a little something
I made some months ago. I need to see if it works and how much pressure it will produce.


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Offline doc_rot

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #183 on: Oct 30, 2017, 13:10:51 »
is that a mechanical fuel pump that runs off the cam?

Offline Nebr_Rex

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #184 on: Oct 30, 2017, 20:57:14 »
It is suppose to be. We'll see how well it works. There are a couple of dimensions I would change next time if it doesn't.
I also need to make a support bracket yet.


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Offline kwak250

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #185 on: Nov 07, 2017, 04:30:52 »
So a few pages back I saw you're tube crossing over the engine to both carbs with the filters in each side, does that take the place of an air box for CV carbs? And if it is, does it work good with no need to re jet the carbs? Thanks been following but not a good enough mechanic to give any other input


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Offline Nebr_Rex

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #186 on: Nov 08, 2017, 21:21:22 »
It's sort of a hybrid between an air box and individual filters.
As far as jetting goes I believe the stock jetting on a completely
stock bike will be incorrect because todays gas is not what it
was 10/15 years ago let alone when the bike was new.


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Offline kwak250

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #187 on: Nov 28, 2017, 22:35:40 »
It's sort of a hybrid between an air box and individual filters.
As far as jetting goes I believe the stock jetting on a completely
stock bike will be incorrect because todays gas is not what it
was 10/15 years ago let alone when the bike was new.


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Thanks for the info, looks cool


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Online canyoncarver

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #188 on: Apr 08, 2018, 23:52:11 »
Still working on this?   I just re-read your whole thread.  Not that I understand a great deal of it but I'm working on it....   :)

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YZF750/1000R The Fly
KZ 750 Twin
ZRX 1100
KZ400 The Rabbit
65 Norton, My damn Shovelhead chop, and an 86' FXR
more YZF750R's, the KZ's, a Zephyr750...and the unfinished 75' CB550 cafe.
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Offline Nebr_Rex

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #189 on: Apr 09, 2018, 21:42:10 »
Still working on it. Not making much progress lately.
First prototype fuel pump was a bust. Now I'm working
on making a scale copy of a Hilborn pump.
Going to pull the engine out of Jekyll and install it in Hyde.
It ran pretty good before with just a milled head [with no
correction for cam timing] and 29 smooth bores. It should
run real good along with the modified cam and increased
displacement. With this I'm going to test the pump.
Depending on how much volume and pressure I get will
determine the next step. That will be BS36s and the turbo
if low pressure. Or constant flow injection with a barrel valve
and extras if high pressure. First naturally aspirated then with
an unmilled head and turbo.
Also picked up an early 400 engine for Jekyll which will get
69mm pistons etc.... for about 40/45 hp at the tire.
Here is one of the gears for the pump. That end mill is .100 in.
in diameter.


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