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Old 09-25-2006, 07:02 PM   #1051
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Quote:
Originally Posted by Kendall
The settings are for the ZX-21 DSII.
Any chance of getting the stock settings for the ZX-12?
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Old 09-25-2006, 07:17 PM   #1052
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Quote:
Originally Posted by neltime64
Any chance of getting the stock settings for the ZX-12?
Start around here:

HSN: 4 1/2 turns out
LSN: 5 1/2 turns out

AFM
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Old 09-25-2006, 09:44 PM   #1053
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Quote:
Originally Posted by afm
Start around here:

HSN: 4 1/2 turns out
LSN: 5 1/2 turns out

AFM
Thanks
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Old 09-26-2006, 01:27 AM   #1054
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Quote:
Originally Posted by mrgsr
m7h.. if i start the engine with the low end that far out it runs very rich, i now have my low end pretty flush with the carb body and it seams ok, but still only going to 85-90degrees Celsius and still rich middle range.

im gonna take it to the lhs the guy there is has been racing nitro for over 20 years his pretty good with tuning.. illlet u know how it goes
With that temp, I think you can lean the top a bit, and after that probably you need to richen the bottom also.....
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Old 09-27-2006, 10:16 PM   #1055
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Default engine prob solved..

Thanks everyone for your help

The engine ended up having a rich low end. Its now able to idle for more than 30+ seconds and then take off with just a slight rich blurb.

The low end needle actually sits screwed in about 1.5 mm from the carb body.. temps are up in the 100degree range now with the engine making great power.

thanks guys!
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Old 10-04-2006, 06:33 PM   #1056
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Default diameter of carb neck?

hi

does anyone know the diameter of the carb neck on the dsII .21 ?

thanks
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Old 10-04-2006, 06:57 PM   #1057
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The DS II .21 , like most engines, comes with different size inserts for the carburetor: 7, 8, & 9.

Clay.
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Old 10-04-2006, 07:40 PM   #1058
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i meant the neck where it fits in to the engine block

thanks
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Old 10-05-2006, 07:48 AM   #1059
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I don't remember the measurement, but if you are thinking of using some other carb,,, Sportwerks carbs fit. They are cheaper & work better than the picco carbs. These do NOT fit; Nova, OS, Sirio, Rossi, Cippola, and Force.
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Old 10-05-2006, 07:58 AM   #1060
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damn i wanted to use the os vz-r .21 carb
has 3 needle adjustment and just seams easier to work with

i might measure the necks and see

i havent ran it on a track yet to see its performance, here we only have 1:8 races 3rd sunday every month so next sunday ill be able to see how it goes
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Old 10-05-2006, 08:13 AM   #1061
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It has been my experience over the years, that any carb you can cram in there, will work better that the picco carbs!
I think Picco engines are top shelf. Great materials, long lasting, able to withstand a lot of abuse and high performance. But,,, the carbs are designed by the retarded step-nephew! I can see this scene play out in my mind; (CEOs' wife to CEO) "you hire Gesepe to make carb!" "He like carbs." "You no hire Gesepe, you no get any of this!"
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Old 10-06-2006, 04:32 AM   #1062
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Hi

I have just installed a STS carby onto my ZX12 to see if that improves it any. I will let you all know how i go...

BB
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Old 10-06-2006, 06:24 AM   #1063
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I think in the .12 size engines, you can use Nova with Picco too.
There are also a couple of adapters for fitting OS carbs to Nova or Picco.
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Old 10-06-2006, 06:50 AM   #1064
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Quote:
Originally Posted by Bundy_Bear
Hi

I have just installed a STS carby onto my ZX12 to see if that improves it any. I will let you all know how i go...

BB
I use an RB carb on my ZX12 and it works great.
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Old 10-09-2006, 09:01 AM   #1065
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I tried a Cippola carb on my .21 over the weekend. I was very pleased with the results. It did require reducing the size of the neck, in order to install it in the Picco block. Not too hard since the neck of the Cippola has an insulating sleave on it. The fiber material cuts nicely on the lathe.
Several advantages with this carb. First, it has all adjustments on the end of the body (opposite of the slide). Far easier to get to the idle speed & low-end adjustments. The flow rates are a closer match to the engines needs than the Sportwerks (and of course the Picco). Still not quite right, but pretty close. The idle is still a little rich when the rest of the low-end adjustment is correct. I will try some different plugs to see if that cures it.
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