hi all,
im going down the zx6 bike carbs with a 2.0l blacktop zetec combi route dose anyone know what size jets i should be using? also the best place to buy
them? also any info on what should be blocked up tweeked/taken off ect the bike carbs to make them suitable for using on the car.im new to this so am
trying to get my head around it all.
many thanks, lewis.
1.8mm diameter for the main jet on a 2l. That holds true for R1s and ZX9Rs so I think its the same for zx6s.
They can be drilled out yourself (I asked this the other day) or you can get a set here for £10:
>>LINKY<<
I think I read the other day that ZX6Rs dont need anything blocking off. There is an air pipe on the top which you should NOT block off, but could fit
a filter too.
Aparently there is something that needs blocking off on the ZX9Rs that I'm currently refurbing (if I can hijack..does anyone have a picture for
reference?)
thanks for the reply i would also like to see pics come on get em out!
Ill get mine out for ya.
zx9r's
Description
Hi Dan, what preparation work did you do on the carbs to get them working on the engine apart from drilling the mains?
Craig, my ZX9R carbs came from ebay off the bike still with petrol in them, bunged them on and went for SVA. Passed.
Had to go to Bogg Brothers after that for tuning as the engine wouldn't rev past 4K.
Mine had a dynojet kit fitted which blocks off the air bleed hole thats in line with the main jet..
The brill mate, thanks a lot. 
Mine were an early bogg bros setup.
They have the blocked air jets and 155 mains. The rest is as bike. They did have 190 jets but i changed them as it was rich as hell.
quote:
Originally posted by Danozeman
Mine were an early bogg bros setup.
They have the blocked air jets and 155 mains. The rest is as bike. They did have 190 jets but i changed them as it was rich as hell.
its some nonstandardised way of describing the diameter of the main jet from reading around.
believe the '155' is a referance to a flow rate rather than a specific dimension, if buying replacement jets be aware there are many
different types/shapes, the number is generally stamped on the top or side of the jet. best way i found was to take a jet into a motorbike shop and
ask, i used a local motorbike dyno shop about £4 each
some jet info
1.55mm i thought
more info from google
Available jets
You never know what kind of jets you might find at your local shop when you try to find new jets. Wes says to just ask for jets that will fit in a
Harley. That keeps the sales droid from having to think too much. Asking about Ninja 250s causes all sorts of confusion. Having this chart, and
knowing what will fit and how they compare to each other, will help you figure out if they have what you can use.
There are four current sources of main jets which will fit the Ninja 250:
1) Keihin - OEM main jets - Jets are measured using an unknown convention in steps of 2 or 3. Available from Kawasaki dealers 2 sizes larger and 2
smaller than the Ninja 250's stock #105 main jets.
2) Dynojet - Measured in mm. Dynojet numbers are simply the hole diameter. A 140DJ main has a 1.40mm (0.055"
diameter hole in it at the threaded
end. Available in .02mm increments. Marked with a 'DJ' on the jet.
3) Precision Engineering - Also sold under the names 'RD Precision Engineering' and 'Freeman Automotive' - All are marked with an
'AB' on the jet. Like Dynojet, measured in mm, but come in .025mm increments.
4) Mikuni - Made for Mikuni Carburetors, but will also fit Keihin. Available in 2.5 increments. Mikuni uses yet another measurement convention -
reportedly based on flow rate. The result is that Mikuni's sizes are vastly different from the other makers'.
The different manufacturers' jets will have a slightly different taper to the orifice, which can affect flow. This means that there will most
likely be very slight differences between the same diameter jets from different makers.
The measurements in this chart are from the actual measured orifice size, in millimeters. Keihin 105 is the stock main jet.
1.8mm will be too big. 1.6 is about right on a 2.0 Zetec.
Stu