srx carbs

This is a scary thread for me because I over looked this when I put a newer set of carbs on my sled this year. My plugs are great!!! Which is nice. How do I check them for the different needles. I know they are clip in the same position!! Help would be awesome.
 
To check your needles, you need to remove them from the carburetors. You do so through the slide covers on the top of the carb. The numbers are stamped on the needles.
 
If you are talking about needle jets (nozzles), and I'm assuming you are, the difference in sizes are in 5 thousands of a millimeter per number increment. Therefore, a Q8 would be 0.010mm larger in diameter than a Q6. Also, each letter increment is 0.050mm larger than the previous.

Example:

Q6 measures 2.730 mm
Q8 measures 2.740 mm
R8 measures 2.790 mm

I hope this helps you.
 
Ok so I am .20 thousands between the needle jets that the sled came with and what I have in it now. It that going to make a big difference? srx6-q2 srx7-q6

both are clipped in the same position!!
 
It will make a difference, yes. Having a larger nozzle will allow more fuel to flow past the needle at various throttle positions.
 
spoons said:
think you just answered your own question
Click to expand...


im not sure about that , i pulled the needles from my 600 carbs and the ones from my 700 yesterday read as follows ;

600- g26
700- f26

i calipered both of them and there does not seem to be any differences ;
 
Ok guys I pulled my carbs and this is what I found.
Oringinal srx600 needles are 6fn2
Srx 700 needle are 6gm26
They are almost the same on my calipers gauge
I know nothing about these and need to know if I should use the old ones or the ones that came with the newer carbs. I am off to do research also!! I would like to put my sled back together so I can ride tonight. Any help would be great!!!!!!!!!!
 
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Here is a pic!!! I think they are tapered but it is really hard to tell!!!
 

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Guys, I am going to clarify this, in case anybody is a bit confused.

You are talking about the needles, not the needle jets.

The needle jets (nozzles, tubes) are mounted in the lower portion of the carburetor. They are hollow tubes where the main jet screws into on the bottom, and the needle slides in and out of when you vary throttle position.

The needles are mounted in the carburetor slide and move in and out of the needle jet. They generally have 5 clip positions, and are tapered on the bottom.
 
Not yet but I am going back out and what should I look for, both of the carb racks are sitting on the bench!!!
 
The letters in the needle description depict the different tapers on the needle, and it will affect how the fuel is drawn during partial throttle application.

F = 1 degree, 30'
N = 3 degrees, 30'

G = 1 degree, 45'
M = 3 degrees, 15'

Generally, there is a number after the ones you have given that states the top width of the needle. I am assuming the numbers you have posted after the letters either have to do with needle length, or where those tapers begin on the needle. The changes on those two needles are minimal, and providing they run the same length, you won't notice much of a difference.
 
valin said:
The letters in the needle description depict the different tapers on the needle, and it will affect how the fuel is drawn during partial throttle application.

F = 1 degree, 30'
N = 3 degrees, 30'

G = 1 degree, 45'
M = 3 degrees, 15'

Generally, there is a number after the ones you have given that states the top width of the needle. I am assuming the numbers you have posted after the letters either have to do with needle length, or where those tapers begin on the needle. The changes on those two needles are minimal, and providing they run the same length, you won't notice much of a difference.
Click to expand...


thanx ryan awsome info " need 4.6 mph to catch the chisler ..those 34mm are looking tempting
 
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