KZ 440 Jetting

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09 May 2015 22:09 #671317 by Mat429
KZ 440 Jetting was created by Mat429
I have an 81 kz 440 with Pods and mufflers cut off. At low rpms its very very blubbery but as soon as you get to mid throttle it runs great. I shimmed the needle to move it up a bit. The fuel air screws are out about 4 1/2 turns. Should i get bigger pilot jets? Was thinking the mains were good because it runs so well from mid to top. Tryin to get some advice so i can stop taking the carbs apart…help me!
- Mat

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10 May 2015 06:18 #671347 by Nebr_Rex
Replied by Nebr_Rex on topic KZ 440 Jetting
Do a search on KZ440 jetting.
1) cut off exhaust just makes noise, there is NO performance advantage.
Just the opposite happens, they reduce it.
2) the filters you are using could be all wrong, do they block the air bleeds?


.
2002 ZRX1200R
81 GPz1100
79 KZ1000st daily ride
79 KZ1000mk2 prodject
78 KZ650sr
78 KZ650b
81 KZ750e
80 KZ750ltd
77 KZ400/440 cafe project
76 KZ400/440 Fuel Injected

www.dotheton.com/forum/index.php?topic=39120.0


.

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11 May 2015 14:46 #671575 by Mat429
Replied by Mat429 on topic KZ 440 Jetting
i ended up getting it by doing some tinkering. Went up a few sizes on the main and a little bit on the Pilot and it runs great.

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11 May 2015 15:12 #671581 by Richardb98
Replied by Richardb98 on topic KZ 440 Jetting
Hey mat I have a 440 too and I was wondering if you could tell me where the fuel mixture screw is? It's probably really obvious but for some reason I can't find it. Thanks

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11 May 2015 20:12 #671691 by Mat429
Replied by Mat429 on topic KZ 440 Jetting
Richard mine are on the top of the carbs toward the front of the bike so you have to have a really small flathead to fit under the tank to adjust them. I also know some of them have a little plug covering them and you have to drill through it to get to them.
The following user(s) said Thank You: Richardb98

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13 May 2015 16:02 #671974 by undiablo
Replied by undiablo on topic KZ 440 Jetting
Mat429: do you mean you manage to get bigger pilots? could you tell us where?
Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires

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13 May 2015 16:10 #671976 by JR
Replied by JR on topic KZ 440 Jetting

undiablo wrote: Mat429: do you mean you manage to get bigger pilots? could you tell us where?


+1
Please tell.
1980 kz750E1, Delkevic exhaust

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13 May 2015 19:16 #672001 by Mat429
Replied by Mat429 on topic KZ 440 Jetting
I got micro drill bits and drilled them out just a little bit.

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13 May 2015 21:33 #672015 by SWest
Replied by SWest on topic KZ 440 Jetting
That's what I'm doing to find that "sweet spot". If you make a mistake you can solder them and start over. Best to have a spare set to play with.
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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14 May 2015 05:02 - 14 May 2015 05:06 #672030 by JR
Replied by JR on topic KZ 440 Jetting

Mat429 wrote: I got micro drill bits and drilled them out just a little bit.


thanks for the info. I was hoping you had found a source. I won't risk drilling though.

It would be nice to try a bigger size pilot but if I screwed up drilling then dead in the water. I can live with what I have

Keihin pilots for the CV34 just don't seem to be available. Darn!
1980 kz750E1, Delkevic exhaust
Last edit: 14 May 2015 05:06 by JR.

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14 May 2015 06:46 #672041 by 650ed
Replied by 650ed on topic KZ 440 Jetting

JR wrote:

Mat429 wrote: I got micro drill bits and drilled them out just a little bit.


.... I won't risk drilling though.
...


Smart man! Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

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14 May 2015 07:57 #672053 by undiablo
Replied by undiablo on topic KZ 440 Jetting
I wonder if anyone with a good micro CNC lather could make them...
Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires

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