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TOPIC: 29 mm smooth bore carbs

29 mm smooth bore carbs 1 year 5 months ago #585054

  • kawasaki mike
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This is aimed at Patton. I found a set of 29mm smoothbores and according to z1 interprises the standard jetting for a kz 1000 is #120 main and a #20 pilot or #25 pilot on the later ones. How do you tell if they are later ones. I do not have pumpers but do have large float bowl plugs. They are the 29-7 carbs.They are pristine and float level is right on. I am at 3200ft elevation, running open 4 into 1 header and pods with Dyna ignition and 1015 10 1/2 to one J E pistons. Everything else stock. Air screw is 1 full turn out and seems lean. What does anybody suggest. I will put either 22.5 or 25 pilots in, just wanted to know what stock jetting was.
Am addicted to Z1's and kz 900's have an el camino, fly rc helicoptors and am strung out on horsepower.
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29 mm smooth bore carbs 1 year 5 months ago #585076

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I didn't think there was a "stock" setting for 29mm carbs since they aren't a factory setup. you could only get them as an aftermarket part.
KZ 900-a4
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29 mm smooth bore carbs 1 year 5 months ago #585078

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You mean as to what was sold in the carbs fron the factory?
KZ 900-a4
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29 mm smooth bore carbs 1 year 5 months ago #585080

  • turboking
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Same carb with different jet....stock jetting for kz mikuni 29's was 25 pilot jet, 120 main........
Current stable
2000 325 H.P. mcXpress turbo Hayabusa
1979 kz 1000 mk II ATP turbo
1975 Z1 960 cc Mr. Turbo
1975 Z1 1428 big block ATP turbo
1976 Kz900 1103 cc ATP turbo
1985 GS 1150E
1983 GS 1100E
1983 GS 1100ES
1997 Suzuki Bandit 1200S
2001 Kawasaki EX 500 Ninja
1972 Honda cb750 (836cc turbo)
Last Edit: 1 year 5 months ago by turboking.
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29 mm smooth bore carbs 1 year 5 months ago #585083

  • Jeff.Saunders
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Before you put them on the bike, check the slide cutaway. Pull a carb top off, stamped on the top of the slide is the cutaway. Carbs for Suzuki GS's typically used a 2.0 cutaway, for the KZ they were 1.5 cutaway.

Depending which version the pilot just will be different.

Assuming 1.5 cutaway, the 25 pilot is probably too rich for your setup at that altitude. The 22.5 or a 20.0 will be best to start with.

If it is a 2.0 cutaway 25 pilot is a good starting point. THe issue with these is the transition of idle is a little soft on KZ. You can make the 2.0 work, but usually they are best on larger motors.
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29 mm smooth bore carbs 1 year 5 months ago #585124

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Thank you Jeff. These have the 1.5 cut slides so I will try the 22.5 pilots. I might be selling these if my buddy wants to get rid of his 34 flat slides.
Am addicted to Z1's and kz 900's have an el camino, fly rc helicoptors and am strung out on horsepower.
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29 mm smooth bore carbs 1 year 5 months ago #585125

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Thats what I needed to know. Thanks for the info.
Am addicted to Z1's and kz 900's have an el camino, fly rc helicoptors and am strung out on horsepower.
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29 mm smooth bore carbs 1 year 5 months ago #585126

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Yes. I will put in 22.5 first and go from there. Thanks for the assistance.
Am addicted to Z1's and kz 900's have an el camino, fly rc helicoptors and am strung out on horsepower.
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29 mm smooth bore carbs 1 year 5 months ago #585127

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I have a set of 28mm ss carbs that work great so I might consider selling these 29mm. They were polished by me and look as close to chrome as you can get. Jet blocks are fine as are the floats. Very clean set. Will post pics if I decide to sell them.
Am addicted to Z1's and kz 900's have an el camino, fly rc helicoptors and am strung out on horsepower.
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