philhoward
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| posted on 24/4/09 at 01:00 PM |
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ZX9R carbs - adjusting
How do you adjust the fuel mixture on the ZX9R carbs. I need to make it slightly richer at the top end.
I have been told that there is a clip on the top of the needle which can be moved up and down. Which part of the carb do you have to strip down to get
to it?
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mackei23b
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| posted on 24/4/09 at 01:10 PM |
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Yes I've ameded my first post after a bit of brainfade...........
Yes, needles are for mid range, main jet for top end
The stock needles are not ajustable. It's the dynojet needles that have the clips.
That said you can use washers to raise the stock needles. To get to the needles you need to remove the round black plasic caps on the carbs, then
you'll need to remove the spring and diaphramthen you'll see the needle. Theres a good parts diagram on kawasaki.com.
Cheers
Ian
[Edited on 24/4/09 by mackei23b]
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coozer
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| posted on 24/4/09 at 02:26 PM |
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To richen up the top end (WOT) you need to enlarge the main jet. Go up 1/2 mm at a time if its close.
Mixture screws adjust the tick over and just off, while the needle position adjusts the mid range.
1972 V8 Jago
1980 Z750
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andrewcutchey
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| posted on 24/4/09 at 03:32 PM |
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Best to go up only 0.05 of a millimetre at a time!
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jacko
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| posted on 24/4/09 at 03:38 PM |
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Hi - You say you need to richen the carbs at top end - on the ZX 9 R carbs there is a air hole in line with the main needle looking from the air
filter side. Have u blocked this off? (This is what Bogg Bros do) to stop the carbs leaning off at high revs.
T adjust the needles you remove the top of the carbs and carefully remove the diaphragm and slide then you can get to the needle. Depending on which
ZX carbs you have some have clips to lift the needles up and down and some u put thin washers under the needles. Jacko ps What engine are you using?
If you do a search under my name and look in my photo archives u will find more info.
The best way to get it rght is to have them set up on a rolling road then you know there set right
this is what i did 
[Edited on 24/4/09 by jacko]
[Edited on 24/4/09 by jacko]
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